Transdermal Drug Delivery System

(TDDS), additionally called ‘ Transdermal patches,’ square measures dose form design to deliver a The human skin is readily accessible surface for drug delivery. Drug Delivery Systems therapeutically effective quantity of across patients skin. In order therapeutics agents through the systemic effect, comprehensive morphological , biophysical and physicochemical properties are be considered. delivery provides leading edge over injectables oral routes by increasing compliance avoiding first pass metabolism respectively. not only controlled, constant administration drug, but also allows continuous input drugs with short biological half-lives eliminates pulse entry into circulation, which often causes undesirable side effects. Over past decades, developing controlled has become increasingly important in pharmaceutical industry. known contain, on an average,10-70 hair follicles 200-250 sweat duct every centimeters area. Skin penetration enhancement techniques have been developed improve bioavailability increase range topical transdermal viable option. present review article explores overall study (TDDS) leads novel system(NDDS).