Available Online through - International Journal of Pharmacy and ...

Naga Pranitha Chodavarapu * et al. /International Journal Of Pharmacy&Technology
diabetic medications treat diabetes mellitus by lowering glucose levels in the blood. With the exceptions of insulin,
exenatide, and pramlintide, all are administered orally and are thus also called oral hypoglycemic agents or oral
antihyperglycemic agents. There are different classes of anti-diabetic drugs like sulfonyl ureas, meglitinides,
biguanides, thiazolidinediones, alpha-glucosidase inhibitors, peptide analogues to mention a few. The selection of
drug depends on the nature of the diabetes, age and situation of the person, as well as other factors. 2 Of those drugs,
Metformin Hydrochloride which comes under the class of Biguanides, is the most widely used antidiabetic agent
which has got widespread use globally.
Gastric emptying of dosage forms is an extremely variable process and ability to prolong and control the emptying
time is a valuable asset for dosage forms, which reside in the stomach for a longer period of time than conventional
dosage forms. Several difficulties are faced in designing controlled release systems for better absorption and
enhanced bioavailability. One of such difficulties is the inability to confine the dosage form in the desired area of the
gastrointestinal tract. Drug absorption from the gastrointestinal tract is a complex procedure and is subject to many
variables. It is widely acknowledged that the extent of gastrointestinal tract drug absorption is related to contact time
with the small intestinal mucosa. 3 Thus, small intestinal transit time is an important parameter for drugs that are
incompletely absorbed.
The controlled gastric retention of solid dosage forms may be achieved by the mechanisms of mucoadhesion, 4
floatation, 5 sedimentation, 6 expansion, 7 modified shape systems, 8 or by the simultaneous administration of
pharmacological agents 9 that delay gastric emptying.
In the present investigation, with the incorporation of the mucilage extracted from the pods of Abelmoshus
esculentus, its efficiency in the formulation of Metformin HCl floating tablets has been demonstrated.
Materials and Methods
Metformin HCl was a gift sample from Glenmark Pharmaceuticals; while HPMC E 15, Sodium bicarbonate, Citric
acid, Magnesium stearate, Talc were purchased from S.d.Fine Chem., Hyderabad. Fresh Okra pods (Abelmoschus
esculentus) were obtained from local market.
IJPT | June-2011 | Vol. 3 | Issue No.2 | 2725-2745 Page 2726