Review on Pulsatile Drug Delivery System

Pulsatile drug delivery systems (PDDS) are advanced pharmaceutical formulations designed to release drugs in a time-controlled manner, characterized by a distinct lag phase followed by rapid drug release. Unlike conventional sustained-release systems, PDDS are developed to synchronize drug availability with the body’s biological rhythms, an approach closely associated with Chronopharmacology. This targeted delivery is particularly beneficial in managing diseases that exhibit circadian variation in symptoms and severity.The design of pulsatile systems involves various strategies, including time-dependent coatings, stimuli-responsive mechanisms, and externally regulated devices. These systems can be triggered by physiological factors such as pH, enzymes, or temperature, ensuring site-specific and timely drug release. PDDS have shown significant therapeutic advantages in conditions like Asthma, Hypertension, and Rheumatoid Arthritis, where symptoms follow predictable daily patterns.Recent advancements in polymer science, nanotechnology, and smart drug delivery have enhanced the precision and efficiency of pulsatile systems. Despite these benefits, challenges such as complex manufacturing processes, higher costs, and potential variability in drug release remain significant concerns.In conclusion, pulsatile drug delivery systems offer a promising approach to improving therapeutic outcomes by aligning drug release with physiological needs. Continued research and technological innovation are expected to overcome current limitations and expand their clinical applications, making PDDS an important focus in modern pharmaceutics.