national-clinical-guidelines-for-stroke-fourth-edition
national-clinical-guidelines-for-stroke-fourth-edition
national-clinical-guidelines-for-stroke-fourth-edition
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5.8.6.2 Sources<br />
A Consensus; De Schryver et al 2006; Ringleb et al 2004; National Institute <strong>for</strong> Health<br />
and Clinical Excellence 2008b<br />
5.9 Oral contraception<br />
Primary prevention studies indicate that there may be an approximate doubling of the<br />
relative risk of ischaemic <strong>stroke</strong> in women using combined (low-dose) oestrogen oral<br />
contraception. This equates to a very small increase in the absolute risk of one ischaemic<br />
<strong>stroke</strong> per year per 20,000 women using low-dose oestrogen oral contraception. It is<br />
unclear how this risk is influenced by a prior history of TIA or <strong>stroke</strong>. There is limited<br />
evidence from primary prevention studies that contraceptive methods containing<br />
progesterone (oral, implant and injectable) showed no significant increase in the risk of<br />
<strong>stroke</strong> and can be used if oral contraception is necessary. For every woman who has had a<br />
<strong>stroke</strong> the risks of pregnancy need to be weighed up against the risks associated with the<br />
use of contraception. The full range of contraceptive methods (hormonal and nonhormonal)<br />
should be considered when making a decision.<br />
Evidence to recommendation<br />
There is strong evidence from primary prevention studies that there is a risk of <strong>stroke</strong><br />
associated with the use of oestrogen containing contraception (Faculty of Sexual and<br />
Reproductive Health 2009). The increased risk is mainly <strong>for</strong> ischaemic <strong>stroke</strong>. There is<br />
limited evidence from a meta-analysis of primary prevention studies (Chakhtoura et al<br />
2009) that progesterone-only methods of contraception appear to have no significant<br />
increase in risk of <strong>stroke</strong> (ischaemic and haemorrhagic). Due to variation in the design<br />
and populations included in the studies, it is difficult to compare the risk associated with<br />
different modes of delivery of progesterone (oral, injectable and implant) and make any<br />
recommendations. There are no studies looking at the safety of the progesterone<br />
containing intra-uterine system. There is no evidence on the risk of <strong>stroke</strong> associated<br />
with use of higher doses of progesterone in the treatment of menstrual disorders but if<br />
oral contraception is required, there is limited evidence that progesterone-only<br />
contraceptives appear to have the least risk.<br />
5.9.1 Recommendation<br />
5.9.2 Source<br />
A The combined oral contraceptive pill should not be routinely prescribed following<br />
ischaemic <strong>stroke</strong>.<br />
A Faculty of Sexual and Reproductive Health 2009<br />
5.10 Hormone replacement therapy<br />
5 Secondary prevention<br />
Some women who have had a <strong>stroke</strong> may wish to continue with hormone replacement<br />
therapy treatment <strong>for</strong> control of symptoms and an enhanced quality of life.<br />
© Royal College of Physicians 2012 77