Many strategies have been proposed to explore the possibility of exploiting gastroretention for drug delivery. Such systems would be useful for local delivery, for drugs that are poorly soluble at higher pH or primarily absorbed from the proximal small intestine. Generally, the requirements of such strategies are that the vehicle maintains controlled drug release and exhibits prolonged residenc...

gastric emptying is a complex and extremely variable process. this causes the unpredictability of the bioavailability of drug delivery systems. gastro retentive drug delivery systems (grdds)s have received significant interest in the past decades as they can overcome the limitation of conventional oral controlled release drug delivery systems related to fast gastric emptying time. an optimum gr...

Lamivudine, a BCS Class I synthetic nucleoside analogue, has a a short biological half-life of 5–7 and is mainly absorbed in the upper gastrointestinal tract. The purpose of the study is to develop a controlled release floating tablets of lamivudine employing HPMC K4M and sodium alginate. The floating tablets of lamivudine were prepared employing HPMC K4M and sodium alginate as matrix formers a...

nowadays, environment-sensitive smart drug delivery systems have found diverse applications in pharmaceutical science and technology. these systems can respond to the environment stimuli such as temperature, pressure, ph, light, electrical and magnetical fields and etc. they can release the proper amount of drug in human body. among these systems, special attention and much research works have ...

The floating microsphere's purpose is to improve gastric retention time. Floating drug delivery systems are lower in bulk thickness than juice and remain on for a long period of time without impacting the gastric-emptying rate increasing bioavailability. Gastro-retentive microspheres particularly suitable continuous or late release oral formulations with blending versatility achieve various pat...

Oral bioavailability of some drugs can be limited by the residence time of pharmaceutical formulation in the upper gastrointestinal tract. Gastric emptying plays an important role in the dynamics of drug absorption and can lead to variable and unpredictable bioavailability. And it becomes more critical for drugs which are exclusively absorbed in the upper small intestine or in a limited segment...

The present investigation is concerned about the development of floating bioadhesive drug delivery system of venlafaxine hydrochloride which after oral administration exhibits a unique combination of floating and bioadhesion to prolong gastric residence time and increase drug bioavailability within the stomach. The floating bioadhesive tablets were prepared by the wet granulation method using d...