Pulsatile Drug Delivery Systems: Current Scenario

Sustained release or controlled release dosage systems have large advantages over conventional drug delivery systems because of their lesser frequency of dose and controlled release of drug. Pulsatile drug delivery system is one such system which offers controlled release of drug at desired site and on required time. Its accuracy is attributed to circardian rhythm of the body and it releases drug in the form of pulse. The relation between physiology of disease and time along the day is discovered. Drug deliveries in the form of single-unit and multiple-unit systems are developed.