A REVIEW ON GASTRORETENTIVE DRUG DELIVERY SYSTEM
Gajanan R.Kapse*, Kadam V.S , Jadhav S.B, Md. zameeruddin,Bharkad V.B, Shinde S.G.
ABSTRACT
This review explains the recent advances in gastroretentive drug
delivery systems with special focus on floating drug delivery systems.
Oral route is the most convenient and painless technique of drug
delivery. Gastroretentive drug delivery systems have been developed
which overcome physiological conditions in gastrointestinal tract such
as short gastric resident time (GRT) and unpredictable gastric
emptying times (GET). Various approaches used for prolonging GRT
are mucoadhesive systems (Bioadhesive Systems), High Density
Systems, Expandable Systems (Swelling Systems), Floating Drug
Delivery systems (FDDS). formulations of floating tablets were
prepared using direct compression technique with low viscosity polymer such as HPMC
K100LV, high viscosity polymers such as HPMC K4M, K15M, and carbopol in different
ratios. The evaluation results revealed that all formulations comply with the specification of
official pharmacopoeias and/or standard reference with respect to general appearance, content
uniformity, hardness, friability and buoyancy. Controlled release (CR) dosage forms have
been extensively used to improve therapy with several important drugs. Incorporation of the
drug in a controlled release gastroretentive dosage forms (CR-GRDF) which can remain in
the gastric region for several hours would significantly prolong the gastric residence time of
drugs and improve bioavailability, reduce drug waste, and enhance the solubility of drugs that
are less soluble in high pH environment. Several approaches are currently utilized in the
prolongation of the GRT, including floating drug delivery systems (FDDS), swelling and
expanding systems, polymeric bioadhesive systems, high-density systems, modified-shape
systems and other delayed gastric emptying devices.
Keywords: Gastric retention time, Gastro retentive systems; floating drug delivery system; Effervescent; non effervescent.
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