Bio adhesive vaginal delivery systems have several advantages when compared toconventional dosage forms. Firstly, the bio adhesive vaginal formulations are readily localized in the region of application thus improving the bioavailability of drugs. Greater bioavailability of insulin [9], calcitonin [10], progesterone [11] and estrogen [12] was observed from bioadhesive vaginal formulations. Secondly, these delivery systems provide intimate contact of the formulation withthe underlying absorption surface. This allow for modification of tissue permeability for absorption of macromolecules such as proteins and peptides [3]. Thirdly, it permits continuous and prolonged residence of the dosage form at the site of application. Lastly, it reduces side effects due to avoidance of repeated administration of the drug
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