Pulsatile Drug Delivery System

Abstract

The objective of a pulsatile drug delivery system (PDDS) is to deliver drugs at a predetermined time or in rapid pulses after a specific lag period, in accordance with the body's circadian rhythms and disease progression. This approach aims to improve therapeutic efficacy, reduce side effects, enhance patient compliance, and optimize the treatment of conditions such as asthma, hypertension, arthritis, diabetes, and peptic ulcers. Methodology: Pulsatile drug delivery systems are developed using various technologies, including time-controlled, pH-sensitive, enzyme-responsive, pressure-controlled, and osmotic delivery mechanisms. Different dosage forms such as capsules, tablets, beads, and multiparticulate systems are formulated to achieve a programmed lag time followed by rapid drug release. The formulations are evaluated for pre-compression and post-compression parameters, lag time, drug release profile, dissolution behavior, stability, and in vitro/in vivo performance to ensure effective pulsatile release. Conclusion: Pulsatile drug delivery systems offer a promising strategy for chronotherapy by synchronizing drug release with the body's biological rhythms and disease symptoms. These systems improve treatment outcomes by delivering medication when it is most needed while minimizing unnecessary drug exposure and adverse effects. Despite challenges related to formulation complexity and manufacturing, continued advancements in drug delivery technologies are expected to enhance the clinical application and effectiveness of pulsatile drug delivery systems.