ABOUT AUTHORS:
Bhaskar Ingole, Shradha Tiwari*
SSS. Indira College of pharmacy,
Vishnupuri, Nanded
*Shraddha.life10@gmail.com
ABSTRACT:
Pulsatile drug delivery aims to release drugs on a programmed pattern means at appropriate time and/or at appropriate site of action. Pulsatile Drug Delivery Systems are gaining a lot of interest as they deliver the drug at the right place at the right time and in the right amount, thus providing spatial and temporal delivery and increasing patient compliance These systems are designed according to the circadian rhythm of the body. Pulsatile release of the drugs is used where a constant drug release is not desired.Gastric retentive systems, systems where the drug is released following a programmed lag phase, chronopharmaceutical drug delivery systems matching human circadian rhythms, multiunit or multilayer systems with various combinations of immediate and sustained-release preparation, are all classified under pulsatile drug delivery systems. On the other hand, site-controlled release is usually controlled by factors such as the pH of the target site, the enzymes present in the intestinal tract and the transit time/pressure of various parts of the intestine. In this review, recent patents on pulsatile drug delivery of oral dosage forms are summarized and discussed.