Abstract

FLOATING DRUG DELIVERY SYSTEM-REVIEW

K. Malleswari,* R.B. Desi Reddy, J. Vijaya Ratna, M. Srilatha

Abstract

The aim of writing this review on gastro retentive and floating drug delivery system was to compile the new literature with the principle mechanism of floatation to acquired gastric retention. Technological attempts have been made in the research and development of ratecontrolled oral drug delivery systems to overcome physiological adversities, such as short gastric residence times (GRT) and unpredictable gastric emptying times (GET). It is known that differences in gastric physiology, such as, gastric pH, and motility exhibit both intra-as well as inter-subject variability demonstrating significant impact on gastric retention time and drug delivery behaviour. This triggered the attention towards formulation of stomach specific (gastro retentive) dosage forms. This dosage forms will be very much useful to deliver ‘narrow absorption window’ drugs. 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. In this review, current & recent developments of Stomach Specific FDDS are discussed.

Keywords: gastric residence time, floating drug delivery system, hydrodynamically balanced system, effervescent, noneffervescent.