GASTRO RETENTIVE DRUG DELIVERY SYSTEM: A SIGNIFICANT TOOL TO INCREASE THE GASTRIC RESIDENCE TIME OF DRUGS

Writing the review on gastro retentive drug delivery systems (GRDDS) was to start up the current literature with a special consequence on several gastro retentive approaches that have become main mode in the field of site-specific orally conduct sustained/controlled release drug delivery. Multi-furious ways have been made in research and development to rate-controlled oral drug delivery systems to solve physiological difficulties, like short gastric residence times (GRT) and unpredictable gastric emptying times (GET). GRDDS is a tool to prolong the GRT, thereby targeting site-specific drug release in the upper gastrointestinal tract (GIT) for local or systemic effect. Oral dosage forms as low bioavailability issues because of their swift gastric transition from the stomach, particularly in the case of drugs that are less soluble at an alkaline pH of the intestine. The drugs that produce their local action in the stomach get quickly emptied and don’t get enough residence time in the stomach. Many efforts have been made to extend the retention time of a drug delivery system to reduce the frequency of dose administration. GRDDS not only prolong dosing intervals but also increase patient compliance beyond the level of existing controlled release dosage forms. This article gives an overview of the advantages, disadvantages, and characterization of gastro retentive drug delivery systems. This also includes commercially available gastro retentive products and patents.