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<strong>Gracial</strong> Product Monograph<br />
Product Monograph<br />
o<br />
For further information, please contact: N.V. Organon, PO Box 20, 5340 BH Oss, The Netherlands, www.<strong>org</strong>anon.com
40 µg ethinylestradiol/25 µg desogestrel (7x)<br />
30 µg ethinylestradiol/125 µg desogestrel (15x)<br />
Product Monograph
© 2000 N.V. Organon<br />
All rights reserved, including that of translation into other languages. No part of this publication may be<br />
reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying,<br />
recording or any information storage and retrieval system, without permission in writing from N.V. Organon.<br />
ISBN 90 687 80 239
Contents<br />
Page<br />
1. INTRODUCTION 1<br />
1.1 Rationale for <strong>Gracial</strong> 4<br />
2. PHARMACOKINETICS 6<br />
2.1 Desogestrel 6<br />
Absorption 6<br />
Metabolism 6<br />
Distribution 7<br />
Elimination 7<br />
2.2 Ethinylestradiol 8<br />
3. PHARMACODYNAMICS 10<br />
3.1 Receptor affinity 10<br />
3.2 Selectivity index 11<br />
3.3 Effects on the pituitary ovarian axis 12<br />
3.4 Effects on cervical mucus 15<br />
4. CONTRACEPTIVE EFFICACY 16<br />
5. ACCEPTABILITY 17<br />
5.1 Cycle control 17<br />
Irregular bleeding 18<br />
Withdrawal bleeding 18<br />
5.2 Side effects 20<br />
5.3 Body weight 21<br />
5.4 Continuation rate 21<br />
6. GRACIAL AND MILD TO<br />
MODERATE ACNE 22<br />
6.1 Effect on SHBG and testosterone 22<br />
6.2 Clinical effects 23<br />
7. SAFETY ASPECTS 27<br />
7.1 Venous thromboembolism 28<br />
Hemostasis 28<br />
Epidemiological data 29<br />
7.2 Arterial disease 33<br />
Lipid metabolism 33<br />
Carbohydrate metabolism 35<br />
Blood pressure 35<br />
Epidemiological data 35<br />
7.3 Gynecological cancer 38<br />
Breast cancer 39<br />
Cervical, ovarian and endometrial cancer 40
Contents<br />
Page<br />
8. SUMMARY 42<br />
9. REFERENCES 43<br />
10. SUMMARY OF PRODUCT<br />
CHARACTERISTICS 48
1. Introduction<br />
•<strong>Gracial</strong> is the first combiphasic oral contraceptive, with<br />
an estrogen-dominant phase of seven days, followed by<br />
a progestogen-dominant phase of 15 days<br />
• The control of irregular bleeding that this regimen<br />
offers makes <strong>Gracial</strong> ideal for women with<br />
unacceptable irregular bleeding patterns<br />
•<strong>Gracial</strong> has also been shown to have beneficial effects<br />
on mild to moderate acne<br />
Benefits of<br />
the Pill<br />
The introduction of combined oral contraceptives (OCs) in the<br />
early sixties made effective and reversible contraception for<br />
women available for the first time.<br />
The obvious benefits of the Pill – prevention of unwanted<br />
pregnancy and consequent reduction in the need for abortion,<br />
the possibility of family planning and the realization of sexual<br />
liberation – were quickly recognized. Pill users also<br />
appreciated the regulation of the menstrual cycle, the<br />
decrease in premenstrual complaints and the possibility of<br />
timing their menstrual periods.<br />
After some initial hesitation, use of the Pill increased rapidly.<br />
By 1999, some 90 million women were using an oral<br />
contraceptive, and their number is still growing.<br />
Although new forms of contraception may be developed in the<br />
near future, the Pill is likely to maintain its important position<br />
as a contraceptive, and more and more women are likely to<br />
become long-term users. Meanwhile, the development of<br />
newer OC formulations, with less systemic effects, has made<br />
the Pill acceptable for a wider spectrum of women.<br />
1
Introduction<br />
Since all the current low-dose OCs containing new-generation<br />
progestogens are safe and reliable, more attention can be<br />
given to the development of preparations that are ‘fine-tuned’<br />
to fit the individual needs of women.<br />
Switchers<br />
Reasons for<br />
switching OCs<br />
Most OC users who start with a low-dose preparation are<br />
satisfied with this. However, for certain subgroups (e.g. women<br />
with unacceptable irregular bleeding or subjective side<br />
effects), the estrogen/progestogen doses of their firstprescribed<br />
OC may not be in balance. These women may<br />
benefit from switching to an OC preparation which has been<br />
especially developed to meet their specific needs.<br />
A study from the Netherlands showed that in 1993, 13.6% of<br />
all OC users switched from one brand to another, mainly for<br />
reasons of acceptability (Figure 1) (Oddens et al 1994).<br />
stop use 12.2%<br />
starters 9.4%<br />
switchers 13.6%<br />
Major Reasons:<br />
• cycle control<br />
• subjective side effects<br />
• skin problems<br />
• change to lighter pill<br />
same brands 64.8%<br />
Fig. 1: OC use and major reasons for brand switching<br />
in the Netherlands in 1993<br />
2
Introduction<br />
<strong>Gracial</strong><br />
A recent study in 2,278 women showed specific reasons for<br />
switching from their previous OC to <strong>Gracial</strong>, as shown in the<br />
figure below (Vree 2000).<br />
Incidence (%)<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
41.3%<br />
Irregular<br />
bleeding<br />
27.0%<br />
Other<br />
menstrual<br />
disorders<br />
9.8%<br />
Migraine/ Decreased<br />
headache libido<br />
3.2% 2.8% 2.7%<br />
Increased<br />
body<br />
weight<br />
Main reason for switching to <strong>Gracial</strong><br />
Fig. 2: Reasons for switching from other OCs to<br />
<strong>Gracial</strong><br />
Acne<br />
Vree 2000<br />
<strong>Gracial</strong> is a Pill which is particularly suitable for women who<br />
want to switch to a different OC because of unacceptable<br />
irregular bleeding or subjective side effects. A number of<br />
studies have also shown <strong>Gracial</strong> to have beneficial effects on<br />
mild to moderate acne.<br />
This product monograph discusses the clinical properties<br />
of <strong>Gracial</strong>, an OC preparation with a unique combiphasic<br />
regimen. The preparation contains DSG and EE in a relatively<br />
estrogenic phase during the first seven days of the Pill cycle,<br />
followed by a progestogenic phase of 15 days for the<br />
remainder of the Pill cycle.<br />
3
Introduction<br />
1.1 Rationale for <strong>Gracial</strong> -<br />
a combiphasic pill with 22 tablets<br />
per cycle<br />
Although most women are satisfied with the first low-dose OC<br />
they are prescribed, each year more than 10% of all OC users<br />
switch their Pill mainly because of unacceptable cycle control<br />
and/or subjective side effects (Oddens et al 1994). In order to<br />
continue with OC use, they need a preparation fitting their<br />
individual needs.<br />
Combiphasic<br />
regimen<br />
Step-up/<br />
step-down<br />
From clinical studies with OCs it seems that irregular bleeding<br />
which occurs early in the cycle is due to a relative estrogen<br />
deficiency, whereas mid- and late-cycle irregular bleeding can<br />
be attributed to a lack of progestogen. Consequently an<br />
innovative combiphasic dosage regimen has been developed<br />
by Organon. It consists of two different estrogen and<br />
progestogen phases, and differs considerably from the<br />
standard biphasic Pill. The combiphasic regimen (Figure 3) has<br />
a unique step-up/step-down sequence. This means that the<br />
progestogen dose increases whilst the estrogen dose<br />
decreases in the second phase of the Pill cycle.<br />
EE 40 µg 30 µg<br />
DSG<br />
25 µg<br />
125 µg<br />
Pill-free<br />
interval<br />
7 22 28<br />
days<br />
Fig. 3: Step-up, step-down combiphasic regimen of<br />
<strong>Gracial</strong><br />
4
Introduction<br />
Estrogen<br />
dominance<br />
7 days<br />
Progestogen<br />
dominance<br />
15 days<br />
Excellent cycle<br />
control<br />
<strong>Gracial</strong>, the first combiphasic oral contraceptive, has an<br />
estrogen-dominant phase of seven days (25 µg DSG + 40 µg<br />
EE), which is followed by a progestogen-dominant phase of 15<br />
days (125 µg DSG + 30 µg EE). The relative estrogenic<br />
dominance during the first seven days controls irregular<br />
bleeding in the first part of the cycle. From day 8 onwards, the<br />
shift to progestogen dominance controls irregular bleeding<br />
during the middle and latter part of the cycle. Theoretically,<br />
this makes <strong>Gracial</strong> an ideal OC for women with unacceptable<br />
irregular bleeding. It has been clearly demonstrated that<br />
<strong>Gracial</strong> has exceptionally good cycle control characteristics<br />
(Dieben, Op ten Berg et al 1994).<br />
Table 1: Estrogen/progestogen balance of<br />
DSG-containing OCs<br />
EE dose Desogestrel dose E/P<br />
(µg/cycle) (µg/cycle) balance<br />
Mercilon 420 3150 1:7.5<br />
Marvelon 630 3150 1:5.0<br />
Laurina 665 2100 1:3.2<br />
<strong>Gracial</strong> 730 2050 1:2.8<br />
The new regimen allows a reduction of one third of the total<br />
progestogen dose compared to Mercilon and Marvelon and a<br />
completely different estrogen/progestogen balance compared<br />
to other OCs containing EE and DSG (Newton 1994).<br />
Conclusion<br />
<strong>Gracial</strong> is a unique combiphasic oral contraceptive that is<br />
particularly suitable for women who wish to switch to a<br />
different OC because of unacceptable irregular bleeding or<br />
subjective side effects. <strong>Gracial</strong> has also been shown to have<br />
beneficial effects on androgenic skin disorders such as acne.<br />
5
2. Pharmacokinetics<br />
• After oral administration, desogestrel is rapidly<br />
transformed into its active metabolite, etonogestrel<br />
• Approximately 96–99% of circulating etonogestrel is<br />
bound to plasma proteins, predominantly albumin and<br />
SHBG<br />
• EE undergoes rapid absorption after oral<br />
administration, with peak plasma levels being reached<br />
after approximately 1.5 hours<br />
Etonogestrel<br />
2.1 Desogestrel<br />
Absorption<br />
Desogestrel (DSG) itself is relatively inactive and most of its<br />
pharmacological activity is attributed to its active metabolite<br />
etonogestrel. In humans, oral doses of DSG are rapidly and<br />
almost completely absorbed, mostly from the duodenum.<br />
Following oral administration, DSG is rapidly and adequately<br />
biotransformed into the active progestogen etonogestrel<br />
(Hasenack et al 1986). In vitro studies indicate that<br />
biotransformation occurs in both the liver and the intestinal<br />
mucosa (Madden et al 1989;1990), the bioavailability being<br />
62–81% after multiple dosing (Timmer et al 1990).<br />
Metabolism<br />
The biotransformation of DSG into etonogestrel takes place in<br />
gastrointestinal and hepatic tissues within 30 minutes<br />
following ingestion.<br />
Potential drug<br />
interactions<br />
The main route of DSG metabolism is a cytochrome P450-<br />
catalyzed hydroxylation followed by a dehydrogenation. The<br />
hepatic cytochrome P450 enzyme system involved in the<br />
metabolism of contraceptive steroids may be induced by<br />
rifampicin, griseofulvin and a number of anticonvulsant drugs<br />
(hydantoins, barbiturates, primidone, carbamazepine) (Geurts<br />
et al 1993). Interactions with oxcarbazepine, rifabutin,<br />
troglitazone and felbamate are also suspected. Animal studies<br />
with phenobarbitone have shown that it induces the<br />
metabolism of desogestrel and etonogestrel. Therefore, there<br />
is a theoretical risk that the effectiveness of <strong>Gracial</strong> may be<br />
reduced in women taking the specified enzyme-inducing drugs.<br />
6
Pharmacokinetics<br />
ENG<br />
predominantly<br />
bound to albumin<br />
and SHBG<br />
Half-life ENG<br />
30 hours<br />
Distribution<br />
After absorption and bioactivation, etonogestrel is distributed<br />
throughout the body. Studies have shown that etonogestrel is<br />
about 96–98% bound to proteins, predominantly to albumin<br />
and sex hormone-binding globulin (SHBG). The EE-induced<br />
increase of plasma SHBG after multiple dosing induces a shift<br />
towards more binding of etonogestrel to SHBG relative to<br />
albumin (Hammond et al 1984).<br />
Elimination<br />
Etonogestrel is eliminated from the body, mainly as<br />
conjugated and polyhydroxylated metabolites (Viinikka et al<br />
1980). The elimination half-life of desogestrel is about 30<br />
hours (Archer et al 1994). Desogestrel and its metabolites are<br />
excreted with urine and feces, the ratio being 1.5:1 (Viinikka<br />
et al 1980).<br />
Etonogestrel<br />
(ng/ml)<br />
1.5<br />
1.0<br />
0.5<br />
Day 22<br />
Day 7<br />
2 4 6 8 12 24 h<br />
Fig. 4: Etonogestrel serum concentration on days 7<br />
and 22 of <strong>Gracial</strong> administration<br />
Jung-Hoffmann et al 1992<br />
7
Pharmacokinetics<br />
ENG mainly<br />
bound to<br />
albumin and<br />
SHBG<br />
2.2 Ethinylestradiol (EE)<br />
Following oral administration of <strong>Gracial</strong>, ethinylestradiol (EE) is<br />
absorbed within 1.5 hours (Jung-Hoffman et al 1992) and<br />
then distributed throughout the body. The absolute<br />
bioavailability of EE after multiple dosing of a DSG/EE<br />
combination has been calculated as approximately 59% (Back<br />
et al 1987). Plasma EE is 98.5% protein bound, almost<br />
entirely to albumin (Kuhl 1990).<br />
The metabolism of EE involves cytochrome P450-mediated<br />
hydroxylation, with 2-hydroxy-EE and 2-methoxy-EE as the<br />
major metabolites (Purba et al 1987).<br />
Half-life EE<br />
29 hours<br />
EE is eliminated from the body principally as conjugated<br />
metabolites and the elimination half-life has been calculated<br />
at about 29 hours (Bergink et al 1990). Excretion occurs via<br />
urine and feces at a ratio of 1:1.6 (Speck et al 1976).<br />
EE pg/ml)<br />
100<br />
50<br />
Day 7<br />
2 4 6 8 12 24 h<br />
EE (pg/ml)<br />
100<br />
50<br />
Day 22<br />
2 4 6 8 12 24 h<br />
Fig. 5: Ethinylestradiol serum concentration on days<br />
7 and 22 of <strong>Gracial</strong> administration<br />
Jung-Hoffmann et al 1992<br />
8
Pharmacokinetics<br />
Conclusion<br />
<strong>Gracial</strong> contains the progestogen desogestrel, which is rapidly<br />
absorbed and transformed following oral administration to its<br />
active metabolite, etonogestrel. Etonogestrel is 96–99%<br />
bound to plasma proteins, mainly albumin and SHBG and is<br />
eliminated from the body in urine and feces. Ethinylestradiol is<br />
98.5% bound to plasma proteins, mainly albumin.<br />
9
3. Pharmacodynamics<br />
•Etonogestrel has a high selectivity index<br />
• The 22-day regimen of <strong>Gracial</strong> permits a very low<br />
progestogen dose in the first seven days of the cycle,<br />
without compromising contraceptive reliability<br />
•<strong>Gracial</strong> inhibits follicle development and ovulation<br />
3.1 Receptor affinity<br />
Different progestogens have different hormonal profiles: in<br />
addition to the progestogenic activity required for the<br />
inhibition of ovulation, progestogens may also possess some<br />
degree of androgenic activity. This is neither required nor<br />
desirable in OCs because of adverse effects such as<br />
androgenic skin disorders.<br />
Desogestrel is derived, like levon<strong>org</strong>estrel, gestodene and<br />
n<strong>org</strong>estimate, from 19-nortestosterone. Desogestrel is,<br />
however, differentiated from levon<strong>org</strong>estrel and other<br />
progestogens by a methylene group at position 11, which<br />
interferes with the binding of desogestrel to androgen<br />
receptors.<br />
CH 3<br />
H 2<br />
C<br />
11<br />
12<br />
CH 2<br />
13<br />
17<br />
OH<br />
C<br />
CH<br />
2<br />
1<br />
9<br />
10 8<br />
14<br />
15<br />
16<br />
3 5<br />
4<br />
6<br />
7<br />
Fig. 6: Structure of desogestrel<br />
10
Pharmacodynamics<br />
In vitro receptor-binding studies are useful in predicting the<br />
hormonal characteristics of progestogens. Such studies have<br />
shown that desogestrel has very little affinity for progesterone,<br />
estrogen or androgen receptors (Bergink et al 1981; Breiner et<br />
al 1986; Juchem and Pollow 1990). However, its active<br />
metabolite etonogestrel exhibits:<br />
• significantly stronger affinity for the progesterone receptor<br />
than levon<strong>org</strong>estrel or norethisterone<br />
•very low affinity for the androgen receptor (considerably<br />
lower than levon<strong>org</strong>estrel or gestodene)<br />
• negligible binding to the estrogen receptor (Bergink et al<br />
1981, 1983; Hoppen and Hammann 1987; Juchem and<br />
Pollow 1990; Kloosterboer et al 1988)<br />
3.2 Selectivity index<br />
The hormonal characteristics of a progestogen can be<br />
assessed by its binding affinity for progesterone and androgen<br />
receptors in in vitro receptor-binding studies as well as by in<br />
vivo bioassay techniques in animal models. In addition,<br />
progestogenic activity can also be assessed in women by<br />
employing clinical endpoints such as the dose needed for<br />
complete ovulation inhibition and effects on the endometrium<br />
and cervical mucus.<br />
Low risk of<br />
adverse<br />
androgenic<br />
events<br />
The receptor-binding affinity studies have indicated that<br />
etonogestrel has a high affinity for the progesterone receptor,<br />
only a low affinity for the androgen receptor and no significant<br />
binding affinity for the estrogen and glucocorticoid receptors.<br />
Figure 7 shows the selectivity index (relative binding affinity to<br />
progesterone versus androgen receptors) of etonogestrel, the<br />
active metabolite of DSG, and the progestogens<br />
norethisterone, levon<strong>org</strong>estrel and gestodene. (Kloosterboer et<br />
al 1987).<br />
11
Pharmacodynamics<br />
40<br />
30<br />
20<br />
10<br />
0<br />
norethisterone<br />
levon<strong>org</strong>estrel etonogestrel gestodene<br />
Fig. 7: Selectivity index of various progestogens<br />
Kloosterboer et al 1987<br />
Suppression of<br />
LH and FSH<br />
secretion<br />
The selectivity index was higher for etonogestrel than for the<br />
other progestogens, norethisterone, levon<strong>org</strong>estrel or<br />
gestodene. Receptor-binding studies do have certain<br />
limitations because the pharmacokinetics and<br />
pharmacodynamics of each compound are not considered.<br />
Nevertheless, they give an indication of the intrinsic properties<br />
of a progestogen and may contribute to the evaluation of<br />
animal and human data. This can be useful when comparing<br />
OCs with similar hormone doses and dose regimens.<br />
3.3 Effects on the pituitary ovarian axis<br />
The contraceptive efficacy of combined oral contraceptives is<br />
primarily due to the ovulation-inhibiting effect of the<br />
progestogen component at the level of the hypothalamus and<br />
pituitary gland. Gonadotrophin (LH and FSH) secretion is<br />
suppressed and as a result follicular maturation and ovulation<br />
are inhibited.<br />
Etonogestrel has been shown to have strong ovulationinhibiting<br />
properties when given in a daily oral dose of 60 µg<br />
(Skouby 1976; Cullberg et al 1982).<br />
<strong>Gracial</strong> contains a daily dose of desogestrel of 25 µg for seven<br />
days and 125 µg for the consecutive 15 days. The 22-day<br />
regimen permits an extremely low progestogen dose in the<br />
first seven days of the cycle, without compromising<br />
contraceptive reliability.<br />
12
Pharmacodynamics<br />
In an ultrasound study, Van der Vange et al (1988)<br />
investigated the effects of <strong>Gracial</strong> on ovarian activity, utilizing<br />
a "standard" 21- (7+14) day regimen. They found that the low<br />
progestogen dosage in the combiphasic regimen permitted<br />
more ovarian activity than did a conventional 30 µg EE<br />
monophasic pill containing DSG. However there was, in every<br />
case, complete inhibition of ovulation.<br />
Jung-Hoffman et al (1992) demonstrated that <strong>Gracial</strong> caused<br />
significant suppression of LH and FSH levels. This was<br />
confirmed by Kuhl et al (1993) (Figure 8) who demonstrated a<br />
significant reduction in gonadotrophin and a profound<br />
suppression of estradiol and progesterone levels, indicating<br />
impairment of follicular development and reliable inhibition of<br />
ovulation.<br />
Conclusion<br />
Pharmacodynamic studies have demonstrated that <strong>Gracial</strong><br />
suppresses gonadotrophin secretion and reliability inhibits<br />
ovulation.<br />
13
Pharmacodynamics<br />
mIU/ml<br />
7<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
0<br />
pg/ml<br />
160<br />
140<br />
120<br />
100<br />
80<br />
60<br />
40<br />
20<br />
0<br />
ng/ml<br />
10<br />
9<br />
8<br />
7<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
0<br />
Pretreatment<br />
cycle<br />
Pretreatment<br />
cycle<br />
Pretreatment<br />
cycle<br />
= LH<br />
= FSH<br />
Cycle 1 Cycle 3 Cycle 6<br />
LH and FSH<br />
Cycle 1 Cycle 3 Cycle 6<br />
Estradiol<br />
Cycle 1 Cycle 3 Cycle 6<br />
Progesterone<br />
Posttreatment<br />
cycle<br />
Posttreatment<br />
cycle<br />
Posttreatment<br />
cycle<br />
Fig. 8: Changes in FSH, LH, estradiol and<br />
progesterone serum concentrations on day<br />
21–24 of the pretreatment cycle, day 18–22<br />
of the first, third and sixth treatment cycle<br />
and day 21–24 of the post-treatment cycle<br />
Kuhl et al 1993<br />
14
Pharmacodynamics<br />
Prevention of<br />
sperm<br />
penetration<br />
3.4 Effect on cervical mucus<br />
Apart from ovulation inhibition, combined OCs have a second<br />
contraceptive effect: they block the cervical ostium to<br />
spermatozoa by keeping the cervical mucus thick and viscous<br />
(Diczfalusy 1968).<br />
During a normal menstrual cycle, the cervical ostium opens<br />
and the mucus becomes more liquid around the time of<br />
ovulation, facilitating sperm penetration. <strong>Gracial</strong> has been<br />
shown to inhibit these changes, thus preventing penetration of<br />
spermatozoa into the uterus. A low ‘Spinnbarkeit’ together<br />
with absence of ‘ferning’ have been consistently observed<br />
(Organon Scientific Development Group 1980).<br />
Conclusion<br />
Pharmacodynamic studies have demonstrated that <strong>Gracial</strong><br />
suppresses gonadotrophin secretion and reliably inhibits<br />
ovulation. <strong>Gracial</strong> also keeps the cervical mucus thick and<br />
viscous, thus preventing penetration of spermatozoa into<br />
the uterus.<br />
15
4. Contraceptive<br />
efficacy<br />
• The Pearl Index of <strong>Gracial</strong> is 0.0 for method failure and<br />
0.1 for user failure, confirming that <strong>Gracial</strong> is a very<br />
reliable Pill<br />
Pearl Index<br />
Contraceptive reliability can be expressed by means of the<br />
Pearl Index, which is an indication of the number of<br />
pregnancies likely to occur per 100 women per year during<br />
use of the method. Combined OCs belong to the group of<br />
contraceptives with the lowest Pearl Index of any reversible<br />
method of contraception: the Pearl Index of modern low-dose<br />
OCs is usually in the range of 0.1–1.<br />
The Pearl Index can be differentiated into the Pearl Index for<br />
‘user failure’ (including those pregnancies occurring when the<br />
Pill is incorrectly taken, e.g. in the case of f<strong>org</strong>otten tablets,<br />
vomiting, diarrhea, simultaneous use of interacting drugs) and<br />
for ‘method failure’ (pregnancies occurring when the Pill has<br />
been taken correctly).<br />
In a large-scale, multicenter study of <strong>Gracial</strong> in which 12,850<br />
cycles were evaluated (Table 2) (Dieben et al 1991) only one<br />
pregnancy occurred and this was attributed to a missed Pill.<br />
This gives a Pearl Index of 0.0 for method failure and 0.1 for<br />
user failure.<br />
Table 2: Pearl Index of <strong>Gracial</strong><br />
Pregnancies<br />
Total investigated<br />
cycles Method failure User failure<br />
12,850 0 1<br />
Pearl Index 0.0 0.1<br />
Dieben et al 1991<br />
The Pearl Index for <strong>Gracial</strong> is fully comparable with that of<br />
conventional low-dose monophasic OCs.<br />
Conclusion<br />
The Pearl Index obtained confirms that <strong>Gracial</strong> is a very<br />
reliable Pill.<br />
16
5. Acceptability<br />
•<strong>Gracial</strong> is associated with excellent cycle control and<br />
the incidence of irregular bleeding is low<br />
• The subjective side effects commonly reported by OC<br />
users are less apparent during use of <strong>Gracial</strong> than<br />
before OC use<br />
• The effects of <strong>Gracial</strong> on body weight are negligible<br />
•<strong>Gracial</strong> is a highly acceptable Pill that should prove<br />
especially suitable for women who experience<br />
unacceptable cycle control with any other low-dose OC<br />
Bleeding during<br />
OC use<br />
Spotting and<br />
breakthrough<br />
bleeding<br />
Withdrawal<br />
bleeding<br />
The acceptability of an OC is determined by subjective<br />
parameters, such as the incidence of side effects like nausea,<br />
headache and breast tenderness, and by more objective<br />
parameters such as cycle control and body weight. These<br />
factors will be discussed in this chapter.<br />
5.1 Cycle control<br />
One of the most important reasons for brand switching of OCs<br />
is poor cycle control. Cycle control is evidenced by the pattern<br />
of irregular bleeding and the heaviness and duration of<br />
withdrawal bleeding.<br />
Irregular bleeding is bleeding occurring during the tablettaking<br />
period, subdivided in studies into spotting - scanty<br />
bleeding requiring no hygienic measures or at most one<br />
sanitary pad per day, and breakthrough bleeding - bleeding<br />
requiring two or more sanitary pads per day.<br />
Withdrawal bleeding is bleeding that starts during the tablet<br />
free intervals. It is generally accepted and welcomed by Pill<br />
users as long as it is not heavier or of longer duration than the<br />
woman’s menstrual blood loss before commencing oral<br />
contraception.<br />
17
Acceptability<br />
Effect of <strong>Gracial</strong><br />
on irregular<br />
bleeding<br />
Irregular bleeding<br />
One of the objectives during the development of <strong>Gracial</strong> was<br />
to minimise irregular bleeding. In a large-scale, European<br />
multicenter study during which 882 women were followed<br />
during a total of more than 12,000 cycles (Dieben et al<br />
1991), excellent cycle control was noted. During <strong>Gracial</strong> use,<br />
the overall incidence of breakthrough bleeding and/or spotting<br />
decreased from 15.4% in the first cycle to 4% at the end of<br />
the study period.<br />
Subsequent detailed analysis of the study data (Dieben, Op<br />
ten Berg et al 1994) demonstrated that during <strong>Gracial</strong> use the<br />
incidence of breakthrough bleeding and/or spotting in<br />
switchers decreased from 14.2% in cycle 1 to 8.1% in cycle 6<br />
and to 5.7% by the end of the study period. Table 3 shows<br />
the incidence of spotting and breakthrough bleeding in<br />
switchers during <strong>Gracial</strong> use.<br />
Table 3: Incidence of irregular bleeding (%) in women<br />
using <strong>Gracial</strong> (switchers)<br />
Switchers<br />
Cycle S B S/B<br />
1 6.8 6.0 1.4<br />
3 4.4 4.9 0.3<br />
6 4.2 3.6 0.3<br />
12 3.5 2.2 0.0<br />
(S=Spotting B=Breakthrough bleeding) Dieben, Op ten Berg et al 1994<br />
The low incidence of irregular bleeding was associated with a<br />
correspondingly low overall dropout rate of 2.2% after 18<br />
cycles, as a result of irregular bleeding.<br />
Withdrawal bleeding<br />
Overall, withdrawal bleeding failed to occur in only 3.2% of<br />
the 12,850 cycles evaluated in the European multicenter<br />
study (Dieben et al 1991).<br />
Withdrawal bleeding occurred in 92.4% in cycle 1, 95% in<br />
cycle 3, 96.8% in cycle 6 and 98.2% in cycle 18 (Figure 9). In<br />
90% of the women, withdrawal bleeding started within the<br />
first four days of the tablet-free period.<br />
18
Acceptability<br />
Decrease in<br />
amount and<br />
duration of<br />
withdrawal<br />
bleeding<br />
The duration of withdrawal bleeding decreased slightly during<br />
the course of the study. Similarly, the amount of bleeding<br />
decreased in 25% of the women while a slight increase in<br />
amount of bleeding was reported by 5% (Dieben, Op ten Berg<br />
et al 1994).<br />
%<br />
100<br />
90<br />
92.4%<br />
95%<br />
96.8%<br />
98.2%<br />
80<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
Cycle 1<br />
Cycle 2<br />
Cycle 6<br />
Cycle 18<br />
Fig. 9: Occurrence of withdrawal bleeding during<br />
<strong>Gracial</strong> use<br />
Dieben et al 1991<br />
In a more recent study, cycle control was found to be<br />
significantly improved after switching to <strong>Gracial</strong> (Vree 2000).<br />
In this study, the incidence of spotting and breakthrough<br />
bleeding decreased from 33.2% and 23.2% of women<br />
respectively in the cycle before starting <strong>Gracial</strong>, to 6.8% and<br />
3.4% of women at the end of the study period (Figure 10).<br />
19
Acceptability<br />
% of women<br />
35<br />
30<br />
25<br />
20<br />
15<br />
10<br />
5<br />
0<br />
Spotting<br />
Previous OC<br />
Breakthrough bleeding<br />
<strong>Gracial</strong><br />
Fig. 10: Incidence of spotting and breakthrough<br />
bleeding before and after switching to <strong>Gracial</strong><br />
Vree 2000<br />
Low incidence of<br />
side effects<br />
5.2 Side effects<br />
As with all OCs, side effects with <strong>Gracial</strong> tended to be reported<br />
more frequently in the first few cycles of use, thereafter<br />
decreasing. Women who switched to <strong>Gracial</strong> from another OC<br />
showed a marked improvement after 12 cycles (Table 4).<br />
Table 4: Incidence of subjective side effects in switchers<br />
Breast<br />
Nausea Headache Nervousness Depression tenderness<br />
Pretreatment 3.7% 9.4% 6.6% 4.5% 6.6%<br />
Cycle 1 3.4% 3.7% 3.9% 0.8% 5.2%<br />
Cycle 3 1.1% 5.2% 2.7% 1.1% 3.0%<br />
Cycle 12 0% 2.5% 2.1% 0.4% 0.7%<br />
Dieben, Op ten Berg et al 1994<br />
In starters it has been shown that minor complaints commonly<br />
reported by OC users are less apparent during the use of<br />
<strong>Gracial</strong> than before OC use (Figure 11).<br />
20
Acceptability<br />
%<br />
0<br />
Nausea<br />
Headache<br />
Nervousness Depression<br />
Breast<br />
tenderness<br />
-0.5<br />
-1<br />
-1.5<br />
-2<br />
-2.5<br />
-3<br />
-3.5<br />
-4<br />
-4.5<br />
-1.5<br />
-4<br />
-3.3<br />
-1.1<br />
-3.1<br />
Fig. 11: Changes in incidence of subjective side<br />
effects after six cycles of <strong>Gracial</strong> (compared<br />
to levels before Pill use) in starters<br />
Dieben, Op ten Berg et al 1994<br />
Negligible effect<br />
on body weight<br />
5.3 Body weight<br />
Body weight was measured every three months in the<br />
multicenter study. There was a mean increase in weight of<br />
between 0.1 and 0.6 kg above pretreatment weight over 18<br />
cycles. Since almost 20% of the study population were aged<br />
under 20 and the actual weight changes were very small, it is<br />
probable that they were merely a reflection of normal growth.<br />
Therefore, as with other low-dose OCs, the effect of <strong>Gracial</strong> on<br />
body weight is negligible and merely reflects the natural<br />
growth in younger women.<br />
5.4 Continuation rate<br />
Overall dropout rate due to bleeding irregularities was 2.2%,<br />
and 4.3% due to minor side effects. These very low figures<br />
illustrate the high acceptability of <strong>Gracial</strong>.<br />
Conclusion<br />
The excellent cycle control during <strong>Gracial</strong> use, together with a<br />
low incidence of subjective side effects and negligible effect on<br />
body weight, makes <strong>Gracial</strong> a highly acceptable Pill. It should<br />
prove especially suitable for women who experience<br />
unacceptable cycle control with any other low-dose OC.<br />
21
6. <strong>Gracial</strong> and mild to<br />
moderate acne<br />
•<strong>Gracial</strong> significantly increases levels of SHBG and<br />
reduces free testosterone<br />
• These serum changes in SHBG and free testosterone<br />
result in a marked reduction in the incidence and<br />
severity of acne<br />
• The improvement in acne seen with <strong>Gracial</strong> is<br />
comparable to that seen with cyproterone acetate<br />
Androgenic skin<br />
disorders<br />
Occurrence or worsening of androgenic skin disorders is also a<br />
reason for brand switching of oral contraceptives, especially in<br />
younger women (Oddens et al 1994). This can be a<br />
consequence of the androgenicity of the progestogen<br />
component.<br />
More androgenic OCs may worsen these skin disorders (and<br />
even induce them in those previously free of such conditions).<br />
One of the underlying factors is an increased total serum<br />
testosterone and/or decreased sex hormone binding globulin<br />
(SHBG) levels, leading to an increase in free serum<br />
testosterone.<br />
In general, exogenous estrogens increase SHBG levels. As a<br />
consequence, more testosterone can be bound to SHBG,<br />
resulting in a decrease of free testosterone in the blood. This<br />
decrease of free testosterone in the blood can lead to an<br />
improvement in mild to moderate acne.<br />
6.1 Effect on SHBG and testosterone<br />
Due to its unique dosage regimen, <strong>Gracial</strong> is slightly estrogen<br />
dominant. In addition, the active progestogen component of<br />
<strong>Gracial</strong> is the most selective of the progestogens used in<br />
combined oral contraceptives. This profile suggests that<br />
<strong>Gracial</strong> has beneficial effects on acne.<br />
22
<strong>Gracial</strong> and mild to moderate acne<br />
Increase in<br />
SHBG levels<br />
Jung-Hoffmann et al (1992) showed that <strong>Gracial</strong> induced a<br />
significant increase in SHBG (+250%) which was sustained for<br />
some weeks after discontinuation of therapy. This finding was<br />
confirmed by Falsetti (1991) and by Kuhl et al (1993) who<br />
subsequently also demonstrated a reduction of 55% of free<br />
serum testosterone levels in <strong>Gracial</strong> users (Figure 12).<br />
nmol/ml<br />
250<br />
200<br />
150<br />
100<br />
50<br />
0<br />
pg/ml<br />
3.0<br />
2.5<br />
2.0<br />
1.5<br />
1.0<br />
0.5<br />
0<br />
Pre-treatment<br />
cycle<br />
Pre-treatment<br />
cycle<br />
Cycle 1 Cycle 2 Cycle 6<br />
SHBG<br />
Cycle 1 Cycle 3 Cycle 6<br />
free testosterone<br />
Posttreatment<br />
cycle<br />
Posttreatment<br />
cycle<br />
Fig. 12: Effects of <strong>Gracial</strong> treatment on serum SHBG<br />
and free testosterone<br />
Kuhl et al 1993<br />
6.2 Clinical effects<br />
In the study by Falsetti (1991), these serum changes in SHBG<br />
and free testosterone levels were associated with a marked<br />
reduction in the incidence and severity of acne. Of 30 women<br />
suffering from a mainly mild to moderate grade of acne, 18<br />
were cured after nine cycles of <strong>Gracial</strong> and in the remaining<br />
12 only mild acne remained.<br />
23
<strong>Gracial</strong> and mild to moderate acne<br />
<strong>Gracial</strong> has<br />
beneficial effects<br />
on mild to<br />
moderate acne<br />
These findings have been confirmed in a study by Volpe et al<br />
(1994) in which almost 80% of a group of 33 young women<br />
with acne were cured or greatly improved during 12 cycles of<br />
<strong>Gracial</strong> use.<br />
Dieben and Vromans (1994) carried out a comparative study<br />
of <strong>Gracial</strong> with a preparation containing 35 µg EE/2 mg<br />
cyproterone acetate (EE/CPA) per day and found that in both<br />
groups there was an equal reduction in degree of severity and<br />
number of acne lesions. Overall there was no statistically<br />
significant difference between the two preparations in their<br />
effects on acne (Figure 13).<br />
Mean acne grade<br />
1.0<br />
0.5<br />
0.69<br />
0.52<br />
0.54<br />
0.41<br />
0<br />
Pretreatment<br />
cycle<br />
EE/CPA<br />
Cycle 4<br />
Pretreatment<br />
cycle<br />
<strong>Gracial</strong><br />
Cycle 4<br />
Fig. 13: Effects of <strong>Gracial</strong> and EE/CPA on acne<br />
Dieben, Vromans 1994<br />
24
<strong>Gracial</strong> and mild to moderate acne<br />
Number and<br />
severity of acne<br />
lesions reduced<br />
Recently, the effects of <strong>Gracial</strong> on acne were again compared<br />
with those of an OC preparation containing ethinylestradiol and<br />
cyproterone acetate (2.0 mg cyproterone acetate/35 µg EE)<br />
(Melief 2000). The study (in which 172 women were randomized<br />
to either treatment) found that <strong>Gracial</strong> progressively reduced<br />
the number and severity of acne lesions during the six cycles of<br />
treatment. In both groups, the majority of women with severe<br />
acne shifted to a less severe acne category (Figure 14). The<br />
efficacy of <strong>Gracial</strong> was comparable to the preparation containing<br />
the antiandrogen cyproterone acetate and no statistically<br />
significant differences were observed between the two groups.<br />
%<br />
100<br />
90<br />
80<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
%<br />
100<br />
90<br />
80<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
A<br />
0 3 6 0 3 6<br />
Combiphasic EE/DSG<br />
EE35/CPA<br />
B<br />
0 3 6 0 3 6<br />
Combiphasic EE/DSG<br />
EE35/CPA<br />
Severe Moderate Mild No acne<br />
Fig. 14: Objective (A) and subjective (B) classification<br />
of severity of acne at pretreatment, Cycle 3<br />
and Cycle 6<br />
25<br />
Melief 2000
<strong>Gracial</strong> and mild to moderate acne<br />
Reduction in<br />
severity of acne<br />
Another recent noncomparative clinical evaluation of women<br />
who switched from a different OC to <strong>Gracial</strong> showed a<br />
reduction in the severity of acne during treatment with <strong>Gracial</strong><br />
(Figure 15) (Vree 2000).<br />
100<br />
80<br />
52%<br />
% of women<br />
60<br />
40<br />
35%<br />
77%<br />
20<br />
18%<br />
0<br />
Previous OC<br />
(n=592)<br />
No. of papules/pustules:<br />
<strong>Gracial</strong><br />
(n=396)<br />
1–5 6–10 >10<br />
Fig. 15: Changes in acne severity after switching to<br />
<strong>Gracial</strong><br />
Vree 2000<br />
Conclusion<br />
<strong>Gracial</strong> significantly increases SHBG levels and reduces free<br />
testosterone, which results in an improvement in the incidence<br />
and severity of mild to moderate acne comparable to that of<br />
cyproterone acetate.<br />
26
7. Safety aspects<br />
• The effects of <strong>Gracial</strong> on hemostatic parameters are<br />
comparable to those of classic triphasic regimens<br />
•<strong>Gracial</strong> has mainly beneficial effects on lipid<br />
metabolism and no clinically adverse effects on<br />
carbohydrate metabolism<br />
•<strong>Gracial</strong> has not been found to have any consistent<br />
adverse effects on blood pressure<br />
• The association between OCs and venous<br />
thromboembolism is likely to be influenced by the<br />
amount of estrogen in the Pill and not by the type of<br />
progestogen<br />
• The risk of AMI is significantly lower in users of third<br />
generation OCs than that seen with older-generation Pills<br />
• The risk of stroke in users of third-generation OCs is not<br />
increased<br />
• OC use substantially reduces the incidence of ovarian<br />
and endometrial cancer<br />
As oral contraceptives are used for long periods of time by<br />
healthy young women for the main purpose of preventing<br />
pregnancy, manufacturers have constantly striven to identify<br />
and minimize potential health risks. From the time of its first<br />
introduction, the Pill has provided virtually 100%<br />
contraceptive efficacy. As a result, most of the developments<br />
in oral contraception over the last 35 years have been driven<br />
by the search for ever better safety and tolerability.<br />
Consequently, any health risk attributable to modern OCs is<br />
small in comparison to the risk to health posed by an<br />
unwanted pregnancy.<br />
Epidemiological<br />
data<br />
New epidemiological data have recently become available<br />
which cast new light upon the association between<br />
cardiovascular disease and OC use. In addition, new data<br />
concerning gynecological cancer risk have also been<br />
published.<br />
27
Safety aspects<br />
<strong>Gracial</strong> not<br />
included in<br />
epidemiology<br />
Since <strong>Gracial</strong> has been on the market for a relatively short<br />
period of time in relatively few countries, it has not been<br />
included in the epidemiological studies on OCs and<br />
cardiovascular disorders. Therefore, an overview of the effects<br />
of <strong>Gracial</strong> on intermediate endpoints associated with lipid<br />
metabolism, carbohydrate metabolism and hemostasis is also<br />
presented in this chapter.<br />
7.1 Venous thromboembolism<br />
The association between OC use and the occurrence of<br />
venous thromboembolism (VTE) is one of the most important<br />
safety aspects that shaped the development of the Pill. It<br />
became apparent within a few years after the introduction of<br />
the Pill that this association was related to its estrogen<br />
component. Studies clearly demonstrated that as the estrogen<br />
dose was progressively reduced, from 100 µg to 50 µg EE by<br />
the 1970s and then down to 30–35 µg, the incidence of<br />
thrombotic events in oral contraceptive users decreased<br />
accordingly (Vessey 1988; Gerstmann et al 1991; RCGP<br />
1978; Farmer 1995).<br />
Hemostasis<br />
In the early years following the introduction of low-dose<br />
(30 µg) Pills such as Marvelon, which utilizes the third-generation<br />
progestogen desogestrel, epidemiological data for their effects<br />
on VTE was not available. Therefore, measurable indicators on<br />
the function of the vascular system, such as hemostatic<br />
parameters, were investigated to determine the impact of OCs.<br />
Effect on<br />
hemostatic<br />
parameters<br />
Changes in hemostatic parameters with <strong>Gracial</strong> (both 22- and<br />
21-day regimens) were comparable to a classic triphasic<br />
regimen. The effects of <strong>Gracial</strong> on hemostatic parametes have<br />
been compared with those of Triodeen (triphasic EE +<br />
gestodene) over a period of six treatment cycles (van Enk et<br />
al, manuscript in preparation). In general, there were<br />
significant changes in all hemostatic parameters with both<br />
<strong>Gracial</strong> and triphasic gestodene.<br />
The following specific differences were noted. <strong>Gracial</strong><br />
produced a significantly larger increase in factor VII (in cycles<br />
3 and 6), a significantly smaller increase in fibrinogen (in cycle<br />
3) and plasminogen (in cycle 6), and significantly larger<br />
decreases in antithrombin III (in cycle 6), protein S (total) (in<br />
cycle 3), protein S (free) (in cycles 3 and 6) and plasminogen<br />
activator inhibitor I (PAI-I-Act) (in cycles 3 and 6). After six<br />
cycles of <strong>Gracial</strong> use, there was no significant change from<br />
baseline in fibrinopeptide A.<br />
28
Safety aspects<br />
<strong>Gracial</strong> has a standard dose of EE (average of 33 µg/day) and<br />
has demonstrated effects on hemostatic parameters<br />
comparable to that of a classic triphasic regimen.<br />
Initial confusion<br />
Epidemiological data<br />
In 1995 and 1996, new epidemiological data on the<br />
association between Pill use and the risk of VTE became<br />
available, which initially caused great confusion because they<br />
were quite at variance with understanding of the issues at the<br />
time (WHO 1995; Jick et al 1995; Spitzer et al 1996).<br />
It was reported that OCs containing the same dose of 30 µg<br />
EE were associated with different odds ratios for VTE<br />
depending upon their progestogen component [levon<strong>org</strong>estrel<br />
(LNG), desogestrel (DSG) or gestodene (GSD)]. The odds ratio<br />
of VTE in users of OCs containing DSG or GSD ranged between<br />
1.5 and 2.2 compared to women using OCs containing LNG.<br />
This finding was in contrast to the medical consensus from the<br />
preceding 35 years of Pill research, in which the risk of VTE<br />
had been shown to decline in parallel with reductions in the<br />
EE dose, irrespective of the progestogen (RCGP 1974; Sartwell<br />
et al 1969; Vessey et al 1977; Gerstmann et al 1991).<br />
In the context of existing and new epidemiological data, it<br />
appeared that the incidence of this venous complication in<br />
women using a third-generation OC (a low dose of EE in<br />
combination with either DSG or GSD) was approximately the<br />
same as that in women using a second-generation OC (a low<br />
dose of EE in combination with LNG) 10 years earlier.<br />
Surprisingly, however, the incidence of VTE in the latter group<br />
had reduced over time. It became clear that the observed<br />
difference in risk of VTE between OC generations was due to a<br />
reduction in the incidence of venous complications with the<br />
second-generation Pills over time, rather than to an<br />
unexpected increase with third-generation Pills.<br />
Healthy user<br />
effect<br />
This decline in incidence of VTE over time has been attributed<br />
to the so-called ‘healthy user’ effect (i.e. the selective removal<br />
of high-risk persons from a cohort of users over time), which<br />
has been operational with the introduction of each new oral<br />
contraceptive (RCGP 1974, 1978; Jick et al 1995; WHO<br />
1995; Gerstmann et al 1991; Vessey 1988; Lewis et al 1996).<br />
In the group of women starting with the Pill, a certain<br />
proportion is expected to have a not yet identified<br />
predisposition to VTE. If these women develop VTE, they will<br />
discontinue use of their OC as they become contraindicated.<br />
29
Safety aspects<br />
The incidence of VTE in the remaining ‘healthy user’ group<br />
then becomes less and less over time. This is the major factor<br />
responsible for the ‘healthy user’ effect.<br />
OC1<br />
OC2<br />
Number of adverse events<br />
time<br />
Fig. 16: User cohort effect (the ‘healthy user’ effect)<br />
or attrition of the susceptibles<br />
(Lewis et al 1997)<br />
Selective<br />
prescribing<br />
A second biasing factor was also operating in the<br />
epidemiological studies called prescribing bias or selective<br />
prescribing. The third-generation Pills were selectively<br />
prescribed to women with risk factors for cardiovascular<br />
disease, such as age, personal or family history of VTE, clinical<br />
venous signs, chronic inflammatory disease, anesthesia or<br />
plaster cast, obesity, diabetes, standing working position,<br />
alcohol abuse, smoking or a combination of risk factors<br />
(Lunsen van 1996; Lis et al 1993; Poulter et al 1996;<br />
Heinemann et al 1996; Farmer 1996; Herings et al 1996;<br />
Jamin and De Mouzon 1996; Lewis et al 1996; Farmer et al<br />
1997; Lidegaard 1997; Dunn et al 1998). As a result of<br />
selective prescribing, cardiovascular adverse effects could be<br />
more frequently observed in users of the third-generation OCs.<br />
30
Safety aspects<br />
Adjusting for<br />
bias<br />
In more recent epidemiological studies (Farmer et al 1997,<br />
1998; Lewis et al 1999; Lidegaard et al 1998; Suissa et al<br />
1997), it was possible to adjust more appropriately for these<br />
newly recognized biases than in previous studies. This was due<br />
to a better understanding of the ways in which these biases<br />
influence results. In this context, the user age and duration of<br />
OC use appear to be closely related to prescribing bias and<br />
the ‘healthy user’ effect. When adjusting for these factors, the<br />
newer analyses consistently observed no difference in the risk<br />
of VTE between second- and third-generation OC users, thus<br />
confirming the likelihood that the initial differences in the<br />
1995 studies were caused by bias and confounding.<br />
The view that the initial studies were biased was substantiated<br />
by a recent analysis by Farmer et al (1999), which reduced<br />
the confounding effects of age and, indirectly, duration of use<br />
to a minimum. This study observed no differences between<br />
odds ratios for VTE in second- and third-generation OC users.<br />
This finding was confirmed in the final analysis of the<br />
Transnational study (Lewis et al 1999), which integrated the<br />
full OC exposure history in their original case-control analysis.<br />
The results of the final analysis are shown in the table below<br />
and suggest that the odds ratio of VTE compared to non-users<br />
is related to the dose of estrogen in the OC and is<br />
independent of the type of progestogen used. The lowest<br />
odds ratios (1.6–2.5) were associated with the low-dose, thirdgeneration<br />
OCs and the highest (8.5) with the first-generation<br />
OCs containing 50 µg estrogen or more. The odds ratios for<br />
VTE with OCs containing 30 µg of EE but different<br />
progestogens (DSG, GSD or LNG) were similar.<br />
31
Safety aspects<br />
Table 5: Relative risk estimates for VTE for different exposures compared<br />
with non-use or second-generation OC use<br />
Current exposure Reference group Odds ratio 95% CI<br />
All OCs No current use 2.9 2.1-4.1<br />
1st generation OCs No current use 8.5 3.0-23.9<br />
2nd generation OCs No current use 2.9 1.9-4.2<br />
Levon<strong>org</strong>estrel OCs No current use 2.6 1.8-4.0<br />
N<strong>org</strong>estimate OCs No current use 3.7 2.2-6.1<br />
3rd generation OCs No current use 2.3 1.5-3.5<br />
Desogestrel/30 EE OCs No current use 2.5 1.6-4.1<br />
Gestodene OCs No current use 2.3 1.4-3.6<br />
Desogestrel/20 EE OCs No current use 1.6 0.9-2.9<br />
3rd generation OCs 2nd generation OCs 0.8 0.5-1.3<br />
(Lewis et al 1999)<br />
Conclusion<br />
It can be concluded that after appropriate adjustments for<br />
relevant confounders and distorting factors, the risk of VTE is<br />
similar for OCs containing the same estrogen doses,<br />
irrespective of the progestogen component.<br />
32
Safety aspects<br />
7.2 Arterial disease<br />
Epidemiological studies have suggested an association<br />
between OCs and arterial disease. As the more androgenic<br />
progestogens have been shown to have a greater adverse<br />
effect on lipid metabolism (with a potential increase in the risk<br />
of arterial diseases such as myocardial infarction and stroke;<br />
Meade et al 1980; Kay 1982), new types of progestogens<br />
were developed with a high level of progestogenic activity, but<br />
substantially reduced androgenic properties.<br />
Risk factors<br />
Etiology<br />
In the population at large, major recognized risk factors for<br />
myocardial infarction (MI) have been identified: age, smoking,<br />
diabetes, hypertension, hypercholesterolemia and a family<br />
history of MI. Some studies, attempting to determine if<br />
women with established risk factors for MI are especially at<br />
risk of this disease while using OCs, have found an interaction<br />
between current OC use and heavy smoking (Rosenberg et al<br />
1990; Croft and Hannaford 1989), and between OC use and<br />
older age (Mann and Inman 1975; Kreuger et al 1980).<br />
The etiology of OC-associated venous thrombosis and<br />
myocardial infarction may differ from each other in an<br />
important aspect. Endothelial damage does not seem to be a<br />
prerequisite for the formation of a venous thrombus (Godsland<br />
and Crook 1996). In contrast, hemodynamic considerations<br />
alone make it unlikely that an arterial thrombus will<br />
accumulate on an entirely intact endothelium. An imbalance in<br />
the normal cycle of arterial endothelial damage and repair, or<br />
the endothelial and intimal lesions seen in OC users, could<br />
result in platelet adhesion and activation and thrombus<br />
accumulation in an apparently normal artery. This process will<br />
be opposed by circulating factors which promote endothelial<br />
integrity, and will be helped along by those factors which<br />
disrupt endothelial function. There are three major candidates<br />
for involvement in these processes: serum triglycerides, HDLcholesterol<br />
and insulin (Godsland and Crook 1996).<br />
Lipoprotein metabolism<br />
Oral contraceptives have effects on a number of the serum<br />
lipoproteins, but the most significant of these effects are<br />
thought to be those on triglycerides and HDL-cholesterol.<br />
33
Safety aspects<br />
Oral contraceptives induce a rise in serum triglycerides which,<br />
in contrast to that associated with atherosclerosis, is due to an<br />
increase in synthesis rather than a decrease in clearance. In<br />
epidemiological studies, triglycerides do not seem to be an<br />
independent risk factor for cardiovascular disease in women.<br />
In addition, other drugs which increase serum triglyceride<br />
levels (e.g. postmenopausal estrogens, alcohol and<br />
cholestyramine) reduce the risk of MI (Castelli 1988).<br />
HDL-cholesterol appears to exert anti-atherosclerotic effects in<br />
several ways (Godlands and Crook 1996). HDL-cholesterol<br />
preserves endothelial integrity by: eliminating lipid<br />
peroxidation products; stabilizing the vasodilator and antiplatelet<br />
agent, prostacyclin; inhibiting endothelial-based<br />
inflammatory responses via a diminution of expression of<br />
endothelial wall adhesion molecules; protecting erythrocytes<br />
against procoagulatory activity; ameliorating abnormal<br />
vasoconstriction; suppressing smooth muscle cell proliferation.<br />
Not surprisingly, elevated HDL levels are consistently<br />
associated with low coronary artery disease rates, especially<br />
in women (Castelli 1988).<br />
Low-estrogen-dose OCs containing the older progestogen,<br />
levon<strong>org</strong>estrel, do not affect or reduce HDL, whereas those<br />
containing third-generation progestogens tend to increase HDL<br />
levels. This variation could be expected to result in differences<br />
in MI rates in users of different brands of OCs and there is<br />
evidence that this may be the case (WHO 1997; Jick et al<br />
1996; Lewis et al 1997a, b; Lidegaard and Edström 1996).<br />
Effect of <strong>Gracial</strong><br />
on lipid<br />
metabolism<br />
<strong>Gracial</strong> has demonstrated a clear and significant increase in<br />
HDL-cholesterol (10–30%), a slight increase in LDLcholesterol,<br />
an increase in triglycerides, a 25% decrease in<br />
apolipoprotein E and a transitory decrease in Lp(a) (Kuhl et al<br />
1993). These findings are consistent with an estrogendominant<br />
Pill.<br />
The effects of <strong>Gracial</strong> on lipid parameters were compared with<br />
those of triphasic gestodene over a period of six cycles (Van<br />
Enk et al, manuscript in preparation, NV Organon, Oss). In<br />
general, there were significant changes in lipid parameters<br />
with both OCs. At cycle 6, <strong>Gracial</strong> produced significantly larger<br />
increases in HDL-cholesterol, HDL-3 cholesterol,<br />
apolipoprotein A1 and triglycerides. LDL-cholesterol increased<br />
more with triphasic gestodene.<br />
34
Safety aspects<br />
Since falling levels of LDL-cholesterol and rising levels of HDLcholesterol<br />
are both considered positive changes, <strong>Gracial</strong>'s<br />
influence on lipid metabolism can be regarded as favorable.<br />
Carbohydrate metabolism<br />
Insulin resistance and accompanying hyperinsulinemia may<br />
induce adverse changes in MI risk via metabolic mechanisms<br />
and effects on blood pressure. Insulin can also have<br />
deleterious effects on the vascular wall by inducing smooth<br />
muscle proliferation and lipid deposition. All oral<br />
contraceptives cause some degree of insulin resistance, but<br />
the effects of currently used low-estrogen-dose OCs vary<br />
considerably. The greatest degree of insulin resistance is seen<br />
with Pills containing levon<strong>org</strong>estrel and the least with those<br />
containing desogestrel (Godsland and Crook 1996).<br />
Effect of <strong>Gracial</strong><br />
on carbohydrate<br />
metabolism<br />
<strong>Gracial</strong> has been shown (Kuhl 1993) to have only minor<br />
effects on plasma insulin and glucose levels following glucose<br />
loading, and no clinically significant effect on fasting insulin<br />
levels or plasma glucose levels.<br />
These results are similar to those reported for other low-dose<br />
oral contraceptives and show that <strong>Gracial</strong> has no clinically<br />
significant effects on carbohydrate metabolism.<br />
No adverse<br />
effect on blood<br />
pressure<br />
Blood pressure<br />
Older studies have shown small increases in blood pressure<br />
with prolonged use of high-estrogen dose OCs. However,<br />
<strong>Gracial</strong> has not been found to have any consistent adverse<br />
effects on blood pressure.<br />
In the multicenter study of Dieben et al (1991), blood<br />
pressure was measured both before use and after every three<br />
cycles of <strong>Gracial</strong>. Particular attention was paid to the 499<br />
women who had not used oral contraception before<br />
('starters'), as any change in blood pressure as a result of<br />
<strong>Gracial</strong> use ought to be most evident in this group. In fact,<br />
blood pressure changes were inconsistent and their magnitude<br />
was close to the limits of error in measurement.<br />
Epidemiological data<br />
In the last few years, several studies have provided new<br />
epidemiological data on arterial disease, acute myocardial<br />
infarction (AMI) and stroke (Jick et al 1996; Heinemann et al<br />
1997; Lewis et al 1997; Lidegaard 1998; Dunn 1999;<br />
WHO 1996).<br />
35
Safety aspects<br />
Stroke<br />
With regard to ischemic stroke, new data have been generated<br />
in the WHO study (WHO 1996), the Transnational study<br />
(Heinemann et al 1997) and a Danish case-control study<br />
(Lidegaard and Kreiner 1998).<br />
The studies are not entirely consistent in their findings. The<br />
stroke publication of the WHO Collaborative Group provides<br />
separate information for the participating centers in Europe<br />
and for those in developing countries. Although the European<br />
data show no difference in the risk of stroke between Pill<br />
generations, the risk of stroke in second-generation OC users<br />
is statistically significantly increased in the centers from the<br />
developing countries, while no increase was found for users of<br />
the third-generation OCs.<br />
The odds ratios in the Transnational study (Heinemann et al<br />
1997) are higher than those observed in the WHO study and<br />
also depend on the type of control group. No differences<br />
between OCs of the second- and third-generation were<br />
observed.<br />
The study by Lidegaard and Kreiner (1998) concluded that<br />
OCs with 50 µg EE and OCs with second-generation<br />
progestogens significantly increased the risk of cerebral<br />
thromboembolic attacks (CTA), which include thrombotic<br />
strokes. However, OCs with third-generation progestogens did<br />
not have any significant influence on the risk of CTA.<br />
Acute MI<br />
The risk of myocardial infarction was assessed in five studies.<br />
In the Transnational AMI study (Lewis et al 1997), the risk of<br />
AMI was observed to be significantly increased in secondgeneration<br />
OC users versus no use, and was not increased in<br />
third-generation OC users compared to no use. When<br />
comparing second- and third-generation OC users, a<br />
statistically significant, three times lower risk was observed for<br />
users of the third-generation OCs (OR 0.3, 95% CI 0.1–0.9).<br />
The authors of the publication concluded that third-generation<br />
OCs are the first class of OCs not to be associated with MI.<br />
36
Safety aspects<br />
*<br />
3<br />
2.5<br />
***<br />
**<br />
OR of AMI<br />
2<br />
1.5<br />
1<br />
0.5<br />
0<br />
2nd-generation<br />
3rd-generation<br />
* 2nd gen vs. non-use: 3.0 (1.5–5.7)<br />
** 3rd gen vs. non-use: 0.8 (0.3–2.3)<br />
*** 3rd gen vs. 2nd-gen: 0.3 (0.1–0.9)<br />
Non-use<br />
Fig. 17: Transnational study – case-control analysis<br />
Risk of acute myocardial infarction<br />
(Lewis et al 1997)<br />
The Danish case-control analysis (Lidegaard 1997) is<br />
consistent with an increased risk of AMI in users of secondgeneration<br />
OCs and an absence of such risk in thirdgeneration<br />
OC users, but the difference was not statistically<br />
significant between OC types.<br />
Findings on AMI were also published by Jick and colleagues<br />
(1996), as well as the WHO Collaborative Group (1997). They<br />
both observed a lower risk of AMI with the third-generation<br />
OCs compared to the second-generation OCs, but the<br />
difference was not significant, probably as a result of the small<br />
size of these analyses. The study of Dunn and colleagues<br />
(MICA) is the only study not showing a benefit with third<br />
generation OCs. This study was done retrospectively and<br />
showed signs of being affected by recall bias influenced by the<br />
awareness created by the Pill scare of 1995.<br />
Although the importance of HDL in arterial disease has been<br />
established in almost every type of population, these new<br />
epidemiological studies may be the first indication that an OCinduced<br />
increase in HDL would also be beneficial.<br />
37
Safety aspects<br />
Influence of<br />
adjustment for<br />
bias<br />
Conclusion<br />
It is probable that the prescribing bias and ‘healthy user’<br />
effect that influenced the VTE studies have also affected the<br />
stroke and AMI studies. Both phenomena induce an unequal<br />
distribution of women at risk of cardiovascular disease over<br />
the different OCs. The effect of adjustment for these biases<br />
would be that the risk of VTE, stroke and AMI would go down<br />
in users of third-generation OCs, but increase in users of<br />
second-generation OCs. The difference in VTE risk would<br />
therefore disappear (as evidenced by the studies of Farmer et<br />
al 1997, 1998, 1999; Lewis et al 1999; Lidegaard et al<br />
1998; Suissa et al 1997, 2000), whereas a beneficial effect of<br />
third-generation OCs regarding stroke may be masked and the<br />
beneficial effect of third-generation OCs regarding AMI would<br />
become even more prominent.<br />
<strong>Gracial</strong> has been shown to have favorable effects on lipid<br />
metabolism and minimal effects on carbohydrate metabolism,<br />
both factors that are known to play a role in the etiology of<br />
cardiovascular disease. The data on stroke are not fully<br />
consistent, but suggest that there is no difference in the risk of<br />
stroke between Pill generations. The risk of myocardial<br />
infarction in users of newer Pills is the same as in non-users of<br />
oral contraception and seems to be lower than the risk in<br />
users of second-generation Pills.<br />
7.3 Gynecological cancer<br />
Concern about a possible association between oral<br />
contraceptive use and increased risk of gynecological cancer<br />
has been present virtually since the introduction of the Pill.<br />
However, epidemiological data indicate that the risk of<br />
endometrial and ovarian cancer is actually reduced in OC<br />
users compared to ‘never-users’ (Stanford 1991; Vessey and<br />
Painter 1995). Although the odds ratio for breast cancer is<br />
slightly higher in current OC users, the breast cancer was more<br />
likely to be diagnosed at an earlier stage and less likely to<br />
have spread beyond the breast than in never-users<br />
(Collaborative Group on Hormonal Factors in Breast Cancer<br />
1996). The association between cervical cancer and OC use<br />
remains inconclusive (Brinton 1991; Zondervan et al 1996).<br />
38
Safety aspects<br />
Breast cancer<br />
In the mid-1980s, preliminary results from early<br />
epidemiological studies suggested that the use of combined<br />
oral contraceptives was associated with an increase in the risk<br />
of breast cancer. However, in the last two decades, numerous<br />
epidemiological studies have been published, and the<br />
consensus has been that OC use has no overall effect on the<br />
risk of breast cancer, except perhaps in certain subgroups of<br />
women.<br />
The Collaborative Group on Hormonal Factors in Breast<br />
Cancer (1996) carried out a meta-analysis of 54<br />
epidemiological studies involving over 50,000 women with<br />
breast cancer, mainly published between 1980 and 1995.<br />
From this meta-analysis, it emerged that:<br />
OC use and<br />
breast cancer<br />
1. Compared to non-users, current users of OCs have a<br />
slightly increased risk of having breast cancer diagnosed<br />
(relative risk 1.24). This risk disappears after 10 years of<br />
discontinuation.<br />
2. The risk of breast cancer is not associated with the<br />
duration of use or dose or type of hormone in the<br />
combined OC. There is no synergism with other risk factors<br />
for breast cancer (e.g. family history).<br />
3. Breast cancer in ‘ever-users’ of OCs was more likely to be<br />
diagnosed at an earlier stage and less likely to have spread<br />
beyond the breast than in ‘never-users’.<br />
39
Safety aspects<br />
On balance, this study is very reassuring. The finding that use<br />
of the Pill does not increase the overall lifetime risk of breast<br />
cancer is very positive, as is the fact that breast cancer in<br />
users or former users of OCs is less likely to have metastasized<br />
at the time of diagnosis. The risk of having breast cancer<br />
diagnosed is slightly increased in current users of the Pill, but<br />
not in those who used an OC 10 years ago. This suggests that<br />
the Pill does not initiate cancer of the breast because the risk<br />
of cancer following exposure to known carcinogens depends<br />
upon the amount and overall duration of exposure and not<br />
upon the length of time elapsed since exposure. It has been<br />
hypothesized that the increased risk of breast cancer in<br />
current users could reflect a higher likelihood of diagnosis as a<br />
result of more frequent professional surveillance and selfexamination<br />
in Pill users. Alternatively, the Pill may be acting<br />
as a promoter of pre-existing breast cancer, thereby advancing<br />
the time at which it becomes clinically detectable (but<br />
conversely reducing its tendency to metastasize). It is not<br />
possible to infer from these epidemiological data whether the<br />
observed relation between breast-cancer risk and OCs is due<br />
to an earlier diagnosis of breast cancer in ever-users, the<br />
biological effects of OCs or a combination of reasons.<br />
Confirmation from experimental studies is necessary.<br />
OC use and<br />
cervical cancer<br />
OC use and<br />
ovarian cancer<br />
Cervical, ovarian and endometrial cancer<br />
The relationship between cervical cancer and OC use is still<br />
inconclusive. Although a slightly elevated risk of cervical<br />
cancer has been reported with OC use (Brinton 1991;<br />
Zondervan et al 1996), it is difficult to adjust for the<br />
confounder of sexual activity, as having multiple partners is a<br />
known risk factor for cervical cancer.<br />
A study by Stanford (1991), investigating the risk of epithelial<br />
ovarian cancer with OC use, showed that in women who have<br />
ever used an oral contraceptive, the risk of ovarian cancer was<br />
reduced by 30%. In addition, five or more years of use was<br />
associated with a 50% reduction in risk. This protective effect<br />
persisted for ten years or more after beginning use of OCs.<br />
A second investigation confirmed this finding (Vessey and<br />
Painter 1995). In comparison with never-users, the relative<br />
risk of ovarian and endometrial cancer in users of OCs was<br />
0.4 (95% CI 0.2–0.8) and 0.1 (95% CI 0.0–0.7), respectively.<br />
There was also a strong negative relationship between the<br />
duration of oral contraceptive use and ovarian-cancer risk, i.e.<br />
in comparison with never-users, the relative risk in users of<br />
40
Safety aspects<br />
OCs decreased as the duration of use increased. The<br />
beneficial effects of OCs on the risk of ovarian and<br />
endometrial cancer are thought to be related to ovulation<br />
inhibition and the reduction of endometrial stimulation,<br />
respectively.<br />
A recent case-control study (Ness 2000) in 767 women aged<br />
20–69 with a diagnosis of ovarian cancer and 1,367<br />
community controls indicated that the protection afforded by<br />
oral contraceptives against epithelial ovarian cancer is<br />
independent of the dose of estrogen or<br />
progestogen. The data from this study also indicate that the<br />
reduced risk continues for 30 or more years after<br />
discontinuation of OC use.<br />
Conclusion<br />
In summary, women who are currently using combined OCs, or<br />
who have used them in the past 10 years, are at a slightly<br />
increased risk of having breast cancer diagnosed. However, the<br />
cancer diagnosed tends to be in a clinically less advanced<br />
stage and is less likely to have spread beyond the breast. In<br />
addition, use of the Pill does not increase the overall lifetime<br />
risk for breast cancer. Furthermore, the incidences of ovarian<br />
and endometrial cancer are substantially reduced by OC use.<br />
The longer OCs are used, the lower the associated risk. The<br />
relationship between cervical cancer and OC use has not yet<br />
been substantiated.<br />
41
8. Summary<br />
The most recent area of contraceptive research focuses on the<br />
development of extensions to the existing range of Pills, each<br />
with different characteristics specially tailored to a specific<br />
subgroup of women. <strong>Gracial</strong> is a Pill which is particularly<br />
suitable for women who wish to switch to a different OC<br />
because they experience irregular bleeding. <strong>Gracial</strong> is a<br />
combined oral contraceptive with a unique combiphasic<br />
regimen: a relatively estrogenic first phase of seven tablets<br />
followed by a relatively progestogenic phase during the<br />
remaining 15 days of the cycle. In <strong>Gracial</strong>, the combination of<br />
EE with the highly selective progestogen desogestrel in a<br />
22-day regimen has permitted a major reduction in the total<br />
cycle progestogen dose with a total estrogen dose comparable<br />
to that of many combined OCs.<br />
Clinical evidence confirms that:<br />
• <strong>Gracial</strong> is a very reliable oral contraceptive<br />
• <strong>Gracial</strong> provides excellent cycle control with a low level of<br />
subjective side effects<br />
• <strong>Gracial</strong> has beneficial effects on mild to moderate acne<br />
• <strong>Gracial</strong> has mainly minimal or beneficial effects on<br />
metabolic parameters.<br />
The clinical profile of <strong>Gracial</strong> makes it eminently suitable for<br />
those women who wish to switch from their first-prescribed<br />
Pill, in particular, for reasons to do with cycle control.<br />
42
9. References<br />
Archer DF, Timmer CJ, Lammers P. Pharmacokinetics of a triphasic oral<br />
contraceptive containing desogestrel and ethinyl estradiol. Fertil Steril 1994;<br />
61: 645–51<br />
Back DJ, Grimmer SFM, Shenoy N, Orme ML’E. Plasma concentrations of<br />
3-ketodesogestrel after oral administration of desogestrel and intravenous<br />
administration of 3-ketodesogestrel. Contraception 1987; 35: 619–26<br />
Bergink EW, Hamburger AD, de Jager E, et al. Binding of a contraceptive<br />
progestogen Org 2969 and its metabolites to receptor proteins and human<br />
sex hormone-binding globulin. J Steroid Biochem 1981; 14: 175–83<br />
Bergink EW, van Meel F, Turpijn EW, et al. Binding of progestagens to receptor<br />
proteins in MCF-7 cells. J Steroid Biochem 1983; 19: 1563–70<br />
Bergink W, Assendorp R, Kloosterboer L, Van Lier W, Voortman G, Qvist I.<br />
Serum pharmacokinetics of orally administered desogestrel and binding of<br />
contraceptive progestogens to sex hormone-binding globulin. Am J Obstet<br />
Gynecol 1990; 163: 2132–7<br />
Breiner M, Romalo G, Schweikert H-U. Inhibition of androgen receptor binding<br />
by natural and synthetic steroids in cultured human genital skin fibroblasts.<br />
Klin Wochenschr 1986; 64: 732–7<br />
Brinton LA. Oral contraceptives and cervical neoplasia. Contraception 1991;<br />
43: 581–95<br />
Castelli WP. Cardiovascular disease in women. Am J Obstet Gynecol 1988;<br />
158: 1553–60<br />
Collaborative Group on Hormonal Factors in Breast Cancer. Breast cancer and<br />
hormonal contraceptives: collaborative re-analysis of individual data on<br />
53,297 women with breast cancer and 100,239 women without breast<br />
cancer from 54 epidemiological studies. Lancet 1996; 347: 1713–27<br />
Cullberg G, Lindtstedt G, Lundberg G, Lundberg PA, Steffensen K. Central and<br />
peripheral effects of desogestrel 15–60 µg daily for 21 days in healthy female<br />
volunteers. Acta Obstet Gynecol Scand 1982; Suppl 111: 21–8<br />
Dicfalusy E. Mode of action of contraceptive drugs. Am J Obstet Gynecol<br />
1968; 100: 136–63<br />
Dieben TOM, Beek A van, Coelingh Bennink HJT. Multicentre study with a new<br />
biphasic oral contraceptive containing ethinylestradiol and desogestrel.<br />
Arzneimittelforschung 1991; 41: 996–8<br />
Dieben TOM, Berg MT Op ten, Coelingh Bennink HJT. Cycle control and side<br />
effects of a new combiphasic oral contraceptive regimen.<br />
Arzneimittelforschung, 1994; 44: 877–9<br />
Dieben TOM, Vromans L et al. The effects of CTR-24, a biphasic oral<br />
contraceptive combination, compared to Diane-35 in women with acne.<br />
Contraception, 1994; 50: 373–82<br />
Dunn N, White I, Freemantle S, Mann R. The role of prescribing and referral<br />
bias in studies of the association between third generation oral contraceptives<br />
and increased risk of thromboembolism. Pharmacoepidemiol Drug Saf 1998;<br />
7: 3–14<br />
Dunn et al. Oral contraceptives and myocardial infarction: results of the MICA<br />
case study. BMJ 1999; 318: 1579–83<br />
43
References<br />
Falsetti L. Acne treatment with a new estroprogestinic biphasic combination<br />
containing desogestrel. Acta Eur Fertil 1991; 22: 283–6<br />
Farmer RDT and Preston TD. The risk of venous thromboembolism associated<br />
with low oestrogen oral contraceptives. J Obstet Gynaecol 1995; 1: 13–20<br />
Farmer RDT. Safety of modern oral contraceptives. Results of AAH Meditel<br />
Study. Lancet 1996; 347: 259<br />
Farmer RDT, Lawrenson RA, Thompson CR, Kennedy JG, Hambleton IR.<br />
Population-based study of the risk of venous thromboembolism associated<br />
with various oral contraceptives. Lancet 1997; 349: 83–8<br />
Farmer RDT, Todd J-C, Lewis MA, MacRae KD, Williams TJ. The risk of venous<br />
thromboembolic disease amongst German women using oral contraceptives: a<br />
database study. Contraception 1998; 57: 67–70<br />
Farmer RDT, Lawrenson RA, Todd JC, Williams TJ, MacRae KD et al. A<br />
comparison of the risk of venous thromboembolic disease in association with<br />
different combined oral contraceptives. 1999, accepted for publication<br />
Gerstmann BB, Piper JM, Tomita DK, Ferguson WJ, Stadel BV et al. Oral<br />
contraceptive estrogen dose and the risk of deep venous thromboembolic<br />
disease. Am J Epidemiol 1991; 133: 32–7<br />
Geurts TBP, Goorissen EM, Sitsen JMA. Summary of drug interactions with<br />
oral contraceptives. Carnforth: Parthenon Publishing Group, 1993<br />
Godsland IF and Crook D. Pathogenesis of vascular disease in oral<br />
contraceptive users. Br J Cardiol 1996; 3: 204–8<br />
Hammond GL et al. Serum steroid binding protein concentrations, distribution<br />
of progestogens, and bioavailability of testosterone during treatment with<br />
contraceptives containing desogestrel or levon<strong>org</strong>estrel. Fertility and Sterility<br />
1984; 42: 44–51<br />
Hasenack HG, Bosch AMG, Käär K. Serum levels of 3-ketodesogestrel after<br />
oral administration of desogestrel and 3-ketodesogestrel. Contraception<br />
1986; 33: 591–6<br />
Heinemann LAJ, Lewis MA, Assmann A, Gravens L, Guggenmoos-Holzmann I.<br />
Could preferential prescribing and referral behaviour of physicians explain the<br />
elevated thrombosis risk found to be associated with third generation oral<br />
contraceptives Pharmacoepidemiol Drug Saf 1996; 5: 285–94<br />
Heinemann LAJ, Lewis MA, Thorogood M, Spitzer WO, Guggenmoos-<br />
Holzmann I, Bruppacher R. Case-control study of oral contraceptives and risk<br />
of thromboembolic stroke: results from international study on oral<br />
contraceptives and health of young women. Br Med J 1997; 315: 1502–4<br />
Herings RMC, de Boer A, Urquhart H, Leufkens HGM. Non-causal explanations for<br />
the increased risk of venous thromboembolism among users of third generation<br />
oral contraceptives [abstract]. Pharmacoepidemiol Drug Saf 1996; 5: S88<br />
Hoppen HO, Hammann P. The influence of structural modification on<br />
progesterone and androgen binding of norethisterone. Correlation of nuclear<br />
magnetic resonance signal. Acta Endocrinol 1987; 115: 406–12<br />
Jamin C and de Mouzon J. Selective prescribing of third generation oral<br />
contraceptives (OCs). Contraception 1996; 54: 55–6<br />
Jick H, Jick SS, Gurewich V, Myers MW, Vasilakis C. Risk of idiopathic<br />
cardiovascular death and non-fatal venous thromboembolism in women using<br />
oral contraceptives with differing progestogen components. Lancet 1995;<br />
346: 1589–93<br />
44
References<br />
Jick H, Jick SS, Myers MW. Risk of acute myocardial infarction and low-dose<br />
combined oral contraceptives (letter). Br Med J 1996; 347: 627–8<br />
Juchem M, Pollow K. Binding of oral contraceptive progestogens to serum<br />
proteins and cytoplasmic receptor. Am J Obstet Gynecol 1990; 163: 2171–83<br />
Jung-Hoffmann C, Storch A, Kuhl H. Serum concentrations of ethinylestradiol,<br />
3-keto-desogestrel, SHBG, CBG and gonadotropins during treatment with a<br />
biphasic oral contraceptive containing desogestrel. Horm Res 1992; 38: 184–9<br />
Kloosterboer HJ, van Wayjen RGA, van den Ende A. Effects of three low-dose<br />
oral contraceptives on sex hormone binding globulin, corticosteroid binding<br />
globulin and antithrombin III activity in healthy women. Acta Obstet Gynecol<br />
Scand 1987;Suppl 144:41–4<br />
Kloosterboer HJ, Vonk-Noordegraaf CA, Turpijn EW. Selectivity of<br />
progesterone and androgen receptor binding of progestagens used in oral<br />
contraceptives. Contraception 1988; 38: 325–32<br />
Kuhl H. Pharmacokinetics of oestrogens and progestogens. Maturitas 1990;<br />
2: 171–197<br />
Kuhl W, März W, Jung-Hoffmann C, Weber J, Siekmeier R, Gross W. Effect on<br />
lipid metabolism of a biphasic desogestrel-containing oral contraceptive:<br />
divergent changes in apolipoprotein B and E and transitory decrease in Lp(a)<br />
levels. Contraception 1993; 47: 69–83<br />
Kuhl H, Jung-Hoffmann C, Weber J, Boehm BO. The effects of a biphasic<br />
desogestrel-containing oral contraceptive on carbohydrate metabolism and<br />
various hormonal parameters. Contraception 1993; 47: 55–68<br />
Lewis MA, Heinemann LAJ, MacRae KD, Bruppacher R, Spitzer WO. The<br />
increased risk of venous thromboembolism and the use of third generation<br />
progestagens: role of bias in observational research. Contraception 1996; 54:<br />
5–13<br />
Lewis MA, Heinemann LAJ, Spitzer WO, MacRae KD, Bruppacher R. The use<br />
of oral contraceptives and the concurrence of acute myocardial infarction in<br />
young women: results from the Transnational study on oral contraceptives and<br />
the health of young women. Contraception 1997; 56: 129–40<br />
Lewis MA, MacRae KD, Kühl-Habich D, Bruppacher R, Heinemann LAJ et al.<br />
The differential risk of oral contraceptives: the impact of full exposure history.<br />
Hum Reprod 1999; 14: 1493–9<br />
Lidegaard Ø and Edström B. Oral contraceptives and acute myocardial<br />
infarction: a case-control study (abstract). Eur J Contracept Reprod Health<br />
Care 1996; 1: 74<br />
Lidegaard Ø. The influence of thrombotic risk factors when oral contraceptives<br />
are prescribed. A control-only study. Acta Obstet Gynecol Scand 1997; 76:<br />
252–60<br />
Lidegaard Ø, Edström B and Kreiner S. Oral contraceptives and venous<br />
thromboembolism. A case-control study. Contraception 1998; 57: 291–301<br />
Lidegaard Ø and Kreiner S. Cerebral thrombosis and oral contraceptives. A<br />
case-control study. Contraception 1998; 57: 303–14<br />
Lis Y, Spitzer WO, Mann RD, Cockburn I, Chukwujindu J, Throrogood M et al.<br />
A concurrent cohort study of oral contraceptive use and cardiovascular risks.<br />
Pharmacoepidemiol Drug Saf 1993; 2: 51–63<br />
45
References<br />
Lunsen HW van. Recent oral contraceptive use patterns in four European<br />
countries: evidence for selective prescribing of oral contraceptives containing<br />
third generation progestogens. Eur J Contracept Reprod Health Care 1996; 1:<br />
39–45<br />
Madden S, Back DJ, Martin CA, Orme ML’E. Metabolism of the contraceptive<br />
steroid desogestrel by the intestinal mucosa. Br J Clin Pharmacol 1989; 27:<br />
295–9<br />
Madden S, Back DJ, Orme ML’E. Metabolism of the contraceptive steroid<br />
desogestrel by human liver in vitro. J Steroid Biochem 1990; 35: 281–8<br />
Melief R. Comparative study of the effect on acne of a new desogestrelcontaining<br />
combiphasic oral contraceptive with one containing cyproterone<br />
acetate. Eur J Contracept Reprod Health Care 2000; 5 (Suppl 1): 71, 1–31<br />
(Poster presented at ESC congress, Ljubljana, 2000)<br />
Ness et al. Risk of ovarian cancer in relation to estrogen and progestin dose<br />
and the characteristics of oral contraceptives. Am J Epidemiol 2000; 152(3):<br />
233–41<br />
Newton JR. Classification and comparison of oral contraceptives containing<br />
new generation progestogens. Hum Reprod Update 1995; 1(3): 231–63<br />
Oddens BJ, Arnolds HT, Maris MGM van, Lunsen HW van. The dynamics of oral<br />
contraceptive use: starting, discontinuation and switching in the Netherlands<br />
1990–93. Accepted for publication in Advances in Contraception, 1994<br />
Organon Scientific Development Group. Data on file, 1980<br />
Poulter NR, Farley TMM, Chang CL, Marmot MG, Meirik O. Author’s reply<br />
(Letter). Lancet 1996; 347: 547<br />
Purba HS, Maggs JL, Orme ML’E, Back DJ, Park BK. The metabolism of 17<br />
alpha-ethinylestradiol by human liver microsomes: formation of catechol and<br />
chemically reactive metabolites. Br J Clin Pharmacol 1987; 23: 447–53<br />
Royal College of General Practitioners. Oral contraceptives and health. New<br />
York: Pitman Publishing Co, 1974<br />
Royal College of General Practitioners Oral Contraceptive Study. Oral<br />
contraceptives, venous thrombosis and varicose veins. Journal of the Royal<br />
College of General Practitioners 1978; 28: 393–9<br />
Sartwell PE, Masi AT, Arthes FG, Greene GR, Smith HE. Thromboembolism and<br />
oral contraceptives: and epidemiological case-control study. Am J Epidemiol<br />
1969; 90: 365–70<br />
Skouby SO. The influence on pituitary ovarian function, cervical mucus and<br />
vaginal cytology of a new progestational compound. Contraception 1976; 14:<br />
529–39<br />
Speck U, Wendt H, Schulze PE, Jentsch D. Bioavailability and<br />
pharmacokinetics of cyproterone acetate 14C and ethinylestradiol 3H after<br />
oral administration as a coated tablet. Contraception 1976; 14: 151–63<br />
Spitzer WO, Lewis MA, Heinemann LAJ, Thorogood M, MacRae KD. Third<br />
generation oral contraceptives and risk of venous thromboembolic disorders:<br />
an international case-control study. BMJ 1996; 312: 83–8<br />
Stanford JL. Oral contraceptives and neoplasia of the ovaries. Contraception<br />
1991; 43: 543–56<br />
Suissa S, Blais L, Spitzer WO, Cusson J, Lewis M, Heinemann L. First-time use<br />
of newer oral contraceptives and the risk of venous thromboembolism.<br />
Contraception 1997; 56: 141–6<br />
46
References<br />
Suissa et al. Recurrent use of newer oral contraceptives and the risk of venous<br />
thromboembolism. Hum Reprod 2000; 15: 817–21<br />
Timmer CJ, Apter D, Voortman G. Pharmacokinetics of 3-ketodesogestrel and<br />
ethinylestradiol released from different types of contraceptive vaginal rings.<br />
Contraception 1990; 42: 629–42<br />
Van Enk et al, manuscript in preparation, NV Organon, Oss<br />
Vange N van der. Ovarian activity during low dose oral contraceptives. In:<br />
Vange N van der, Chamberlain, eds. Contemporary Obstetrics and<br />
Gynaecology. Butterworths, Kent, England, 1988: 315–26<br />
Vessey MP et al. Mortality among women participating in the Oxford/Family<br />
Planning Association contraception study. Lancet 1977; ii: 731<br />
Vessey MP. Epidemiological studies of lower dose oral contraceptives.<br />
Presented at the XII World Congress of Gynecology and Obstetrics. Rio de<br />
Janeiro, October 26, 1988<br />
Vessey MP and Painter R. Endometrial and ovarian cancer and oral<br />
contraceptives–findings in a large cohort study. Br J Cancer 1995; 71: 1340–2<br />
Viinikka L, Ylikorkola O, Vihko R, Hasenacj HG. Metabolism of a new synthetic<br />
progestogen, <strong>org</strong> 2969, in female volunteers. The distribution and excretion of<br />
radioactivity after an oral dose of the labelled drug. Acta Endocrinol 1980;<br />
93: 374–9<br />
Volpe A, Silferi M, Mauri A, Deiana P, Angioni S, Grasso A et al Efficacy on<br />
hyperandrogenism and safety of a new oral contraceptive biphasic<br />
formulation containing desogestrel. Eur J Obstet Gynecol Reprod Biol, 1994;<br />
53: 205–9<br />
Vree M. Observational clinical evaluation of a desogestrel-containing<br />
combiphasic oral contraceptive in Germany. Eur J Contracept Reprod Health<br />
Care 2000; 5 (suppl 1): 71, 1–31<br />
World Health Organization Collaborative Study of Cardiovascular Disease and<br />
Steroid Hormone Contraception. Effect of different progestogens in low<br />
oestrogen oral contraceptives on venous thromboembolic disease. Lancet<br />
1995; 346: 1582–8<br />
World Health Organization Collaborative Study of Cardiovascular Disease and<br />
Steroid Hormone Contraception. Ischaemic stroke and combined oral<br />
contraceptives: results of an international, multicentre, case-controlled study.<br />
Lancet 1996; 348: 505–10<br />
World Health Organization Collaborative Study of Cardiovascular Disease and<br />
Steroid Hormone Contraception. Acute myocardial infarction and combined<br />
oral contraceptives: results of an international, multicentre, case-control study.<br />
Lancet 1997; 349; 1202–9<br />
Zondervan KT, Carpenter LM, Painter R and Vessey MP. Oral contraceptives<br />
and cervical cancer - further findings from the Oxford Family Planning<br />
Association Contraceptive Study. Br J Cancer 1996; 73: 1291–7<br />
47
10. Summary of product characteristics<br />
1. NAME OF THE MEDICINAL<br />
PRODUCT<br />
<strong>Gracial</strong>®.<br />
2. QUALITATIVE AND QUANTITATIVE<br />
COMPOSITION<br />
<strong>Gracial</strong>® is a combiphasic oral contraceptive of<br />
which:<br />
• each blue tablet contains 25 mcg desogestrel<br />
(DSG) and 40 mcg ethinylestradiol (EE).<br />
• each white tablet contains 125 mcg DSG and<br />
30 mcg EE.<br />
3. PHARMACEUTICAL FORM<br />
Tablets for oral use.<br />
4. CLINICAL PARTICULARS<br />
4.1 Therapeutic Indications<br />
Contraception.<br />
4.2 Posology and method of<br />
administration<br />
4.2.1 How to take <strong>Gracial</strong>®<br />
Tablets must be taken in the order directed on the<br />
package every day at about the same time with<br />
some liquid as needed. One tablet is to be taken<br />
daily for 22 consecutive days. Each subsequent<br />
pack is started after a 6-day tablet-free interval,<br />
during which time a withdrawal bleed usually<br />
occurs. This usually starts on day 2–3 after the<br />
last tablet and may not have finished before the<br />
next pack is started.<br />
4.2.2 How to start <strong>Gracial</strong>®<br />
No preceding hormonal contraceptive use [in the<br />
past month]<br />
Tablet-taking has to start on day 1 of the woman’s<br />
natural cycle (i.e. the first day of her menstrual<br />
bleeding). Starting on days 2–5 is allowed, but<br />
during the first cycle a barrier method is<br />
recommended in addition for the first 7 days of<br />
tablet-taking.<br />
Changing from another combined oral<br />
contraceptive (COC)<br />
The woman should start with <strong>Gracial</strong>® preferably<br />
on the day after the last active tablet of her<br />
previous COC, but at the latest on the day<br />
following the usual tablet-free or placebo tablet<br />
interval of her previous COC.<br />
Changing from a progestagen-only method<br />
(minipill, injection, implant)<br />
The woman may switch any day from the minipill<br />
(from an implant on the day of its removal, from<br />
an injectable when the next injection would be<br />
due), but should in all of these cases be advised to<br />
additionally use a barrier method for the first<br />
7 days of tablet-taking.<br />
Following first-trimester abortion<br />
The woman may start immediately. When doing<br />
so, she need not take additional contraceptive<br />
measures.<br />
Following delivery or second-trimester abortion<br />
For breast-feeding women see Section 4.6<br />
Women should be advised to start at day 21 to 28<br />
after delivery or second-trimester abortion. When<br />
starting later, the woman should be advised to<br />
additionally use a barrier method for the first 7<br />
days of tablet-taking. However, if intercourse has<br />
already occurred, pregnancy should be excluded<br />
before the actual start of COC use or the woman<br />
has to wait for her first menstrual period.<br />
4.2.3 Management of missed tablets<br />
If the user is less than 12 hours late in taking any<br />
tablet, contraceptive protection is not reduced.<br />
The woman should take the tablet as soon as she<br />
remembers and should take further tablets at the<br />
usual time.<br />
If she is more than 12 hours late in taking any<br />
tablet, contraceptive protection may be reduced.<br />
The management of missed tablets can be guided<br />
by the following two basic rules:<br />
1. tablet-taking must never be discontinued for<br />
longer than 6 days.<br />
2. 7 days of uninterrupted tablet-taking are<br />
required to attain adequate suppression of the<br />
hypothalamic-pituitary-ovarian-axis.<br />
Accordingly, the following advice can be given in<br />
daily practice:<br />
• Week 1<br />
The user should take the last missed tablet as<br />
soon as she remembers, even if this means<br />
taking two tablets at the same time. She then<br />
continues to take tablets at her usual time. In<br />
addition, a barrier method such as a condom<br />
should be used for the next 7 days. If<br />
intercourse took place in the preceding 7 days,<br />
the possibility of a pregnancy should be<br />
considered. The more tablets are missed and<br />
the closer they are to the regular tablet-free<br />
interval, the higher the risk of a pregnancy.<br />
48
Summary of product characteristics<br />
• Week 2<br />
The user should take the last missed tablet as<br />
soon as she remembers, even if this means<br />
taking two tablets at the same time. She then<br />
continues to take tablets at her usual time.<br />
Provided that the woman has taken her tablets<br />
correctly in the 7 days preceding the first<br />
missed tablet, there is no need to use extra<br />
contraceptive precautions. However, if this is not<br />
the case, or if she missed more than 1 tablet,<br />
the woman should be advised to use extra<br />
precautions for 7 days.<br />
• Week 3<br />
The risk of reduced reliability is imminent<br />
because of the forthcoming tablet-free interval.<br />
However, by adjusting the tablet-intake<br />
schedule, reduced contraceptive protection can<br />
still be prevented. By adhering to either of the<br />
following two options, there is therefore no need<br />
to use extra contraceptive precautions, provided<br />
that in the 7 days preceding the first missed<br />
tablet the woman has taken all tablets correctly.<br />
If this is not the case, the woman should be<br />
advised to follow the first of these two options<br />
and to use extra precautions for the next 7 days<br />
as well.<br />
1. The user should take the last missed tablet as<br />
soon as she remembers, even if this means<br />
taking two tablets at the same time. She then<br />
continues to take tablets at her usual time.<br />
The next pack must be started as soon as the<br />
current pack is finished, i.e., no gap should be<br />
left between packs. The user is unlikely to<br />
have a withdrawal bleed until the end of the<br />
second pack, but she may experience<br />
spotting or breakthrough bleeding on tablettaking<br />
days.<br />
2. The woman may also be advised to<br />
discontinue tablet-taking from the current<br />
pack. She should then have a tablet-free<br />
interval of up to 6 days, including the days<br />
she missed tablets, and subsequently<br />
continue with the next pack.<br />
If the woman missed tablets and subsequently has<br />
no withdrawal bleed in the first normal tablet-free<br />
interval, the possibility of a pregnancy should be<br />
considered.<br />
4.2.4 Advice in case of vomiting<br />
If vomiting occurs within 3–4 hours after tablettaking,<br />
absorption may not be complete. In such<br />
an event, the advice concerning missed tablets, as<br />
given in Section 4.2.3, is applicable. If the woman<br />
does not want to change her normal tablet-taking<br />
schedule, she has to take the extra tablet(s)<br />
needed from another pack.<br />
4.2.5 How to shift periods or how to delay a<br />
period<br />
To delay a period, the woman should continue with<br />
the white tablets in another pack of <strong>Gracial</strong>®<br />
without a tablet-free interval. The extension can be<br />
carried on for as long as wished until the end of<br />
the second pack (maximally 15 days). During the<br />
extension the woman may experience<br />
breakthrough bleeding or spotting. Regular intake<br />
of <strong>Gracial</strong>® is then resumed after the usual 6-day<br />
tablet-free interval.<br />
To shift her period to another day of the week than<br />
the woman is used to with her current scheme, she<br />
can be advised to shorten her forthcoming tabletfree<br />
interval by as many days as she likes. The<br />
shorter the interval, the higher the risk that she<br />
does not have a withdrawal bleed and will<br />
experience breakthrough bleeding and spotting<br />
during the second pack (just as when delaying a<br />
period).<br />
4.3 Contraindications<br />
Combined oral contraceptives (COCs) should not<br />
be used in the presence of any of the conditions<br />
listed below. Should any of the conditions appear<br />
for the first time during COC use, the product<br />
should be stopped immediately.<br />
• Thrombosis (venous or arterial) present or in<br />
history (e.g. deep venous thrombosis, pulmonary<br />
embolism, myocardial infarction,<br />
cerebrovascular accident).<br />
• Presence or history of prodromi of a thrombosis<br />
(e.g. transient ischemic attack, angina pectoris).<br />
• Diabetes mellitus with vascular involvement.<br />
• The presence of a severe or multiple risk<br />
factor(s) for venous or arterial thrombosis may<br />
also constitute a contraindication (see under<br />
‘Special Warnings and Special Precautions for<br />
Use’).<br />
• Presence or history of severe hepatic disease as<br />
long as liver function values have not returned to<br />
normal.<br />
• Known or suspected malignant conditions of the<br />
genital <strong>org</strong>ans or the breasts, if sex steroid<br />
influenced.<br />
• Presence or history of liver tumors (benign or<br />
malignant).<br />
• Undiagnosed vaginal bleeding.<br />
• Known or suspected pregnancy.<br />
• Hypersensitivity to any of the components of<br />
<strong>Gracial</strong>®.<br />
49
Summary of product characteristics<br />
4.4 Special warnings and special<br />
precautions for use<br />
4.4.1. Warnings<br />
If any of the conditions/risk factors mentioned<br />
below is present, the benefits of COC use should<br />
be weighed against the possible risks for each<br />
individual case and discussed with the woman<br />
before she decides to start using it. In the event of<br />
aggravation, exacerbation or first appearance of<br />
any of these conditions or risk factors, the woman<br />
should contact her physician. The physician should<br />
then decide on whether its use should be<br />
discontinued.<br />
1. Circulatory Disorders<br />
• Epidemiological studies have suggested an<br />
association between the use of COCs and an<br />
increased risk of arterial and venous thrombotic<br />
and thromboembolic diseases such as<br />
myocardial infarction, stroke, deep venous<br />
thrombosis, and pulmonary embolism. These<br />
events occur rarely.<br />
• Venous thromboembolism (VTE), manifesting as<br />
deep venous thrombosis and/or pulmonary<br />
embolism, may occur during the use of all COCs.<br />
The approximate incidence of VTE in users of<br />
low-estrogen-dose (< 50 mcg EE) OCs is up to 4<br />
per 10 000 woman years compared to 0.5–3<br />
per 10 000 woman years in non-OC users.<br />
However, the incidence of VTE occurring during<br />
COC use is substantially less than the incidence<br />
associated with pregnancy (i.e. 6 per 10,000<br />
pregnant woman years).<br />
• Extremely rarely, thrombosis has been reported<br />
to occur in other blood vessels, e.g. hepatic,<br />
mesenteric, renal or retinal veins and arteries, in<br />
COC users. There is no consensus as to whether<br />
the occurrence of these events is associated<br />
with the use of COCs.<br />
• Symptoms of venous or arterial thrombosis can<br />
include: unilateral leg pain and/or swelling;<br />
sudden severe pain in the chest, whether or not<br />
it radiates to the left arm; sudden<br />
breathlessness; sudden onset of coughing; any<br />
unusual, severe, prolonged headache; sudden<br />
partial or complete loss of vision; diplopia;<br />
slurred speech or aphasia; vertigo; collapse with<br />
or without focal seizure; weakness or very<br />
marked numbness suddenly affecting one side<br />
or one part of the body; motor disturbances;<br />
‘acute’ abdomen.<br />
• The risk of thromboembolism (venous and/or<br />
arterial) increases with:<br />
• age;<br />
• smoking (with heavier smoking and increasing<br />
age the risk further increases, especially in<br />
women over 35 years of age);<br />
• a positive family history (i.e. venous or arterial<br />
thromboembolism ever in a sibling or parent<br />
at a relatively early age). If a hereditary<br />
predisposition is suspected, the woman<br />
should be referred to a specialist for advice<br />
before deciding about any COC use;<br />
• obesity (body mass index over 30 kg/m 2 );<br />
• dyslipoproteinemia;<br />
• hypertension;<br />
• valvular heart disease;<br />
• atrial fibrillation;<br />
• prolonged immobilization, major surgery, any<br />
surgery to the legs, or major trauma. In these<br />
situations it is advisable to discontinue COC<br />
use (in the case of elective surgery at least<br />
four weeks in advance) and not to resume<br />
until two weeks after complete remobilization.<br />
• There is no consensus about the possible role of<br />
varicose veins and superficial thrombophlebitis<br />
in venous thromboembolism.<br />
• The increased risk of thromboembolism in the<br />
puerperium must be considered (for information<br />
on “Pregnancy and Lactation” see Section 4.6).<br />
• Other medical conditions which have been<br />
associated with adverse circulatory events<br />
include diabetes mellitus, systemic lupus<br />
erythematosus, hemolytic uremic syndrome and<br />
chronic inflammatory bowel disease (Crohn's<br />
disease or ulcerative colitis) and sickle cell<br />
disease.<br />
• An increase in frequency or severity of migraine<br />
during COC use (which may be prodromal of a<br />
cerebrovascular event) may be a reason for<br />
immediate discontinuation of the COC.<br />
• Biochemical factors that may be indicative of<br />
hereditary or acquired predisposition for venous<br />
or arterial thrombosis include Activated Protein<br />
C (APC) resistance, hyperhomocysteinemia,<br />
antithrombin-III deficiency, protein C deficiency,<br />
protein S deficiency, antiphospholipid antibodies<br />
(anticardiolipin antibodies, lupus anticoagulant).<br />
• When considering risk/benefit, the physician<br />
should take into account that adequate<br />
treatment of a condition may reduce the<br />
associated risk of thrombosis and that the risk<br />
associated with pregnancy is higher than that<br />
associated with COC use.<br />
50
Summary of product characteristics<br />
2. Tumors<br />
• An increased risk of cervical cancer in long-term<br />
users of COCs has been reported in some<br />
epidemiological studies, but there continues to<br />
be controversy about the extent to which this<br />
finding is attributable to the confounding effects<br />
of sexual behavior and other factors such as<br />
human papilloma virus (HPV).<br />
• A meta-analysis from 54 epidemiological studies<br />
reported that there is a slightly increased<br />
relative risk (RR = 1.24) of having breast cancer<br />
diagnosed in women who are currently using<br />
COCs. The increased risk gradually disappears<br />
during the course of the 10 years after cessation<br />
of COC use. Because breast cancer is rare in<br />
women under 40 years of age, the excess<br />
number of breast cancer diagnoses in current<br />
and recent COC users is small in relation to the<br />
lifetime risk of breast cancer. These studies do<br />
not provide evidence for causation. The<br />
observed pattern of increased risk may be due<br />
to an earlier diagnosis of breast cancer in COC<br />
users, the biological effects of COCs or a<br />
combination of both. The breast cancers<br />
diagnosed in ever-users tend to be less<br />
advanced clinically than the cancers diagnosed<br />
in never-users.<br />
• In rare cases, benign liver tumors, and even<br />
more rarely, malignant liver tumors have been<br />
reported in users of COCs. In isolated cases,<br />
these tumors have led to life-threatening intraabdominal<br />
hemorrhages. A hepatic tumor<br />
should be considered in the differential<br />
diagnosis when severe upper abdominal pain,<br />
liver enlargement or signs of intra-abdominal<br />
hemorrhage occur in women taking COCs.<br />
3. Other conditions<br />
• Women with hypertriglyceridemia, or a family<br />
history thereof, may be at an increased risk of<br />
pancreatitis when using COCs.<br />
• Although small increases in blood pressure have<br />
been reported in many women taking COCs,<br />
clinically relevant increases are rare. A<br />
relationship between COC use and clinical<br />
hypertension has not been established.<br />
However, if a sustained clinically significant<br />
hypertension develops during the use of a COC<br />
then it is prudent for the physician to withdraw<br />
the COC and treat the hypertension. Where<br />
considered appropriate, COC use may be<br />
resumed if normotensive values can be achieved<br />
with antihypertensive therapy.<br />
• The following conditions have been reported to<br />
occur or deteriorate with both pregnancy and<br />
COC use, but the evidence of an association<br />
with COC use is inconclusive: jaundice and/or<br />
pruritus related to cholestasis; gallstone<br />
formation; porphyria; systemic lupus<br />
erythematosus; hemolytic uremic syndrome;<br />
Sydenham’s chorea; herpes gestationis;<br />
otosclerosis-related hearing loss.<br />
• Acute or chronic disturbances of liver function<br />
may necessitate the discontinuation of COC use<br />
until markers of liver function return to normal.<br />
Recurrence of cholestatic jaundice which<br />
occurred first during pregnancy or previous use<br />
of sex steroids necessitates the discontinuation<br />
of COCs.<br />
• Although COCs may have an effect on peripheral<br />
insulin resistance and glucose tolerance, there is<br />
no evidence for a need to alter the therapeutic<br />
regimen in diabetics using COCs. However,<br />
diabetic women should be carefully observed<br />
while taking COCs.<br />
• Crohn’ s disease and ulcerative colitis have been<br />
associated with COC use.<br />
• Chloasma may occasionally occur, especially in<br />
women with a history of chloasma gravidarum.<br />
Women with a tendency to chloasma should<br />
avoid exposure to the sun or ultraviolet radiation<br />
while taking COCs.<br />
4.4.2. Medical examination/consultation<br />
A complete medical history and physical<br />
examination should be taken prior to the initiation<br />
or reinstitution of COC use, guided by the<br />
contraindications (Section 4.3) and warnings<br />
(Section 4.4.1), and should be repeated at least<br />
annually during the use of COCs. Periodic medical<br />
assessment is also of importance because<br />
contraindications (e.g. a transient ischemic attack,<br />
etc.) or risk factors (e.g. a family history of venous<br />
or arterial thrombosis) may appear for the first<br />
time during the use of a COC. The frequency and<br />
nature of these assessments should be adapted to<br />
the individual woman but should generally include<br />
special reference to blood pressure, breasts,<br />
abdomen and pelvic <strong>org</strong>ans, including cervical<br />
cytology, and relevant laboratory tests.<br />
Women should be advised that oral contraceptives<br />
do not protect against HIV infections (AIDS) and<br />
other sexually transmissible diseases.<br />
4.4.3 Reduced efficacy<br />
The efficacy of COCs may be reduced in the event<br />
of missed tablets (Section 4.2.3), vomiting (Section<br />
4.2.4) or concomitant medication (Section 4.5.1).<br />
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Summary of product characteristics<br />
4.4.4 Reduced cycle control<br />
With all COCs, irregular bleeding (spotting or<br />
breakthrough bleeding) may occur, especially<br />
during the first months of use. Therefore, the<br />
evaluation of any irregular bleeding is only<br />
meaningful after an adaptation interval of about<br />
three cycles.<br />
If bleeding irregularities persist or occur after<br />
previously regular cycles, then non-hormonal<br />
causes should be considered and adequate<br />
diagnostic measures are indicated to exclude<br />
malignancy or pregnancy. These may include<br />
curettage.<br />
In some women, withdrawal bleeding may not<br />
occur during the tablet-free interval. If the COC has<br />
been taken according to the directions described<br />
in Section 4.2, it is unlikely that the woman is<br />
pregnant. However, if the COC has not been taken<br />
according to these directions prior to the first<br />
missed withdrawal bleed or if two withdrawal<br />
bleeds are missed, pregnancy must be ruled out<br />
before COC use is continued.<br />
4.5 Interaction with other medicinal<br />
products and other forms of interaction<br />
4.5.1 Interactions<br />
Drug interactions which result in an increased<br />
clearance of sex hormones can lead to<br />
breakthrough bleeding and oral contraceptive<br />
failure. This has been established with hydantoins,<br />
barbiturates, primidone, carbamazepine and<br />
rifampicin; oxcarbazepine, topiramate and<br />
griseofulvin are also suspected. The mechanism of<br />
this interaction appears to be based on the<br />
hepatic enzyme-inducing properties of these drugs.<br />
Maximal enzyme induction is generally not seen<br />
for 2–3 weeks but may then be sustained for at<br />
least 4 weeks after the cessation of drug therapy.<br />
Contraceptive failures have also been reported<br />
with antibiotics, such as ampicillins and<br />
tetracyclines. The mechanism of this effect has not<br />
been elucidated.<br />
Women on short-term treatment with any of the<br />
above-mentioned classes of drugs or individual<br />
drugs should temporarily use a barrier method in<br />
addition to the COC, i.e. during the time of<br />
concomitant drug administration and for 7 days<br />
after their discontinuation. For women on<br />
rifampicin a barrier method should be used in<br />
addition to the COC during the time of rifampicin<br />
administration and for 28 days after its<br />
discontinuation. If concomitant drug administration<br />
runs beyond the end of the tablets in the COC<br />
pack, the next COC pack should be started<br />
without the usual tablet-free interval.<br />
In women on long-term treatment with hepatic<br />
enzyme-inducing drugs, experts have<br />
recommended to increase the contraceptive<br />
steroid doses. If a high contraceptive dosage is not<br />
desirable or appears to be unsatisfactory or<br />
unreliable, e.g. in the case of irregular bleeding,<br />
another method of contraception should be<br />
advised.<br />
4.5.2 Laboratory tests<br />
The use of contraceptive steroids may influence<br />
the results of certain laboratory tests, including<br />
biochemical parameters of liver, thyroid, adrenal<br />
and renal function, plasma levels of (carrier)<br />
proteins, e.g. corticosteroid binding globulin and<br />
lipid/lipoprotein fractions, parameters of<br />
carbohydrate metabolism and parameters of<br />
coagulation and fibrinolysis. Changes generally<br />
remain within the normal laboratory range.<br />
4.6 Use during pregnancy and lactation<br />
Extensive epidemiological studies have revealed<br />
neither an increased risk of birth defects in<br />
children born to women who used COCs prior to<br />
pregnancy, nor a teratogenic effect when COCs<br />
were taken inadvertently during early pregnancy.<br />
See also Contraindications.<br />
Lactation may be influenced by COCs as they may<br />
reduce the quantity and change the composition<br />
of breast milk, therefore, the use of COCs should<br />
generally not be recommended until the nursing<br />
mother has completely weaned her child. Small<br />
amounts of the contraceptive steroids and/or their<br />
metabolites may be excreted with the milk but<br />
there is no evidence that this adversely affects<br />
infant health.<br />
4.7 Effects on ability to drive and use<br />
machines<br />
No observed effects.<br />
4.8 Undesirable effects<br />
4.8.1 Serious undesirable effects<br />
See Section 4.4.1.<br />
4.8.2 Other possible undesirable effects<br />
The following undesirable effects have been<br />
reported in users of COCs and the association has<br />
been neither confirmed nor refuted:<br />
Breast tenderness, pain, secretion; headache;<br />
migraine; changes in libido; depressive moods;<br />
contact lens intolerance; nausea; vomiting;<br />
changes in vaginal secretion; various skin<br />
disorders; fluid retention; change in body weight;<br />
hypersensitivity reaction.<br />
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Summary of product characteristics<br />
4.9 Overdose<br />
There have been no reports of serious deleterious<br />
effects from overdose. Symptoms that may occur<br />
in this case are: nausea, vomiting and, in young<br />
girls, slight vaginal bleeding. There are no<br />
antidotes and further treatment should be<br />
symptomatic.<br />
5. PHARMACOLOGICAL PROPERTIES<br />
5.1 Pharmacodynamic properties<br />
<strong>Gracial</strong>® is a combiphasic OC containing DSG as<br />
the progestagen component. The combiphasic<br />
concept stands for a low and stepwise increased<br />
progestagen dosage while at the same time the<br />
estrogen dose is reduced. With this concept, cycle<br />
control can be improved as compared to<br />
monophasic OCs while maintaining their high<br />
contraceptive efficacy. The contraceptive effect of<br />
COCs is based on the interaction of various factors,<br />
the most important of which are seen as the<br />
inhibition of ovulation and the changes in the<br />
cervical secretion. As well as protection against<br />
pregnancy, COCs have several positive properties<br />
which, next to the negative properties (see<br />
Warnings, Undesirable effects), can be useful when<br />
deciding on a method of birth control. The cycle is<br />
more regular and the menstruation is often less<br />
painful and bleeding is lighter. The latter may<br />
result in a decrease in the occurrence of iron<br />
deficiency. Apart from this, with the higher-dosed<br />
COCs (50 mg ethinylestradiol), there is evidence of<br />
a reduced risk of fibrocystic tumours of the<br />
breasts, ovarian cysts, pelvic inflammatory disease,<br />
ectopic pregnancy and endometrial and ovarian<br />
cancer. Whether this also applies to lower-dosed<br />
COCs remains to be confirmed.<br />
5.2 Pharmacokinetic properties<br />
Desogestrel<br />
ABSORPTION<br />
Orally administered desogestrel is rapidly and<br />
completely absorbed and converted to<br />
etonogestrel. Peak serum concentrations of<br />
approximately 0.3 (day 7) to 1.6 ng/ml (day 22)<br />
are reached at about 1.5 hours after ingestion.<br />
Bioavailability is 62–81%.<br />
DISTRIBUTION<br />
Etonogestrel is bound to serum albumin and to sex<br />
hormone binding globulin (SHBG). Only 2–4% of<br />
the total serum drug concentrations are present as<br />
free steroid, 40–70% are specifically bound to<br />
SHBG. The ethinylestradiol-induced increase in<br />
SHBG influences the distribution over the serum<br />
proteins, causing an increase in the SHBG-bound<br />
fraction and a decrease in the albumin-bound<br />
fraction. The apparent volume of distribution of<br />
desogestrel is 1.5 l/kg.<br />
METABOLISM<br />
Etonogestrel is completely metabolized by the<br />
known pathways of steroid metabolism. The<br />
metabolic clearance rate from serum is about<br />
2 ml/min/kg. No interaction was found with the<br />
co-administered ethinylestradiol.<br />
ELIMINATION<br />
Etonogestrel serum levels decrease in two phases.<br />
The terminal disposition phase is characterized by<br />
a half-life of approximately 30 hours. Desogestrel<br />
and its metabolites are excreted at a urinary to<br />
biliary ratio of about 6:4.<br />
STEADY-STATE CONDITIONS<br />
Etonogestrel pharmacokinetics are influenced by<br />
SHBG levels, which are increased threefold by<br />
ethinylestradiol. Following daily ingestion, drug<br />
serum levels increase about two- to three-fold,<br />
reaching steady-state conditions during the second<br />
half of the treatment cycle.<br />
Ethinylestradiol<br />
ABSORPTION<br />
Orally administered ethinylestradiol is rapidly and<br />
completely absorbed. Peak serum concentrations<br />
of about 80–100 pg/ml are reached within 1–2<br />
hours. Absolute bioavailability as a result of<br />
presystemic conjugation and first-pass metabolism<br />
is approximately 60%.<br />
DISTRIBUTION<br />
Ethinylestradiol is highly but non-specifically<br />
bound to serum albumin (approximately 98.5%)<br />
and induces an increase in the serum<br />
concentrations of SHBG. An apparent volume of<br />
distribution of about 5 l/kg was determined.<br />
METABOLISM<br />
Ethinylestradiol is subject to presystemic<br />
conjugation in both small bowel mucosa and the<br />
liver. Ethinylestradiol is primarily metabolized by<br />
aromatic hydroxylation but a wide variety of<br />
hydroxylated and methylated metabolites are<br />
formed, and these are present as free metabolites<br />
and as conjugates with glucuronides and sulfate.<br />
The metabolic clearance rate is about 5 ml/min/kg.<br />
53
Summary of product characteristics<br />
ELIMINATION<br />
Ethinylestradiol serum levels decrease in two<br />
phases, the terminal disposition phase is<br />
characterized by a half-life of approximately<br />
24 hours. Unchanged drug is not excreted,<br />
ethinylestradiol metabolites are excreted at a<br />
urinary to biliary ratio of 4:6. The half-life of<br />
metabolite excretion is about 1 day.<br />
STEADY-STATE CONDITIONS<br />
Steady-state concentrations are reached after<br />
3–4 days when serum drug levels are higher by<br />
30–40% as compared to single dose.<br />
5.3 Preclinical safety data<br />
Animal toxicity studies for human risk estimation<br />
were performed for both components of the<br />
preparation, ethinylestradiol and desogestrel, and<br />
the combination.<br />
No effects which might indicate an unexpected risk<br />
to humans were observed during systemic<br />
tolerance studies after repeated administration.<br />
Long-term repeated dose toxicity studies did not<br />
indicate a tumorigenic potential. However, it must<br />
be borne in mind that sex steroids can promote<br />
the growth of certain hormone-dependent tissues<br />
and tumors.<br />
Studies on embryotoxicity and teratogenicity and<br />
the evaluation of the effects of both components<br />
on the fertility of parent animals, fetal<br />
development, lactation and reproductive<br />
performance of the offspring gave no indication of<br />
a risk of adverse effects in humans after<br />
recommended use of the preparation.<br />
In vitro and in vivo studies gave no indication of a<br />
mutagenic potential.<br />
6. PHARMACEUTICAL PARTICULARS<br />
6.1 List of excipients<br />
Blue tablets:<br />
Colloidal silicon dioxide; lactose; potato starch;<br />
povidone; stearic acid; dl-alpha-tocopherol;<br />
indigotin (E132).<br />
White tablets:<br />
Colloidal silicon dioxide; lactose; potato starch;<br />
povidone; stearic acid; dl-alpha-tocopherol.<br />
The daily amount of lactose (< 100 mg) is such<br />
that women with an intolerance to lactose are<br />
highly unlikely to experience a problem.<br />
6.2 Incompatibilities<br />
Not applicable.<br />
6.3 Shelf life<br />
Shelf life of the tablets is as indicated on the box,<br />
if stored according to the directions in Section 6.4.<br />
6.4 Special precautions for storage<br />
Store at 2°C to 30°C.<br />
6.5 Nature and contents of container<br />
Push-through packs with 7 blue and 15 white<br />
tablets. Tablets are round, flat and 6 mm in<br />
diameter. Tablets are coded on one side with<br />
Organon* and on the reverse side with TR8 (white<br />
tablets) or TR9 (blue tablets).<br />
The pack is a PVC/Al blister consisting of<br />
aluminium foil with a heat-seal coating and a PVC<br />
film. Each blister is packed in a printed aluminium<br />
pouch. The pouch is packed in a printed<br />
cardboard box together with the package leaflet.<br />
6.6 Instructions for use/handling and<br />
disposal (if appropriate)<br />
Store all drugs properly and keep them out of<br />
reach of children.<br />
7. MARKETING AUTHORIZATION<br />
HOLDER<br />
N.V. Organon<br />
P.O. Box 20<br />
5340 BH Oss<br />
The Netherlands<br />
8. NUMBERS IN THE COMMUNITY<br />
REGISTER OF MEDICINAL<br />
PRODUCTS<br />
9. DATE OF FIRST AUTHORIZATION<br />
[Market-specific information must be included in<br />
this section where applicable].<br />
10. DATE OF REVISION OF TEXT<br />
February 1998.<br />
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