A comprehensive review on transdermal patches as an efficient approach for the delivery of drug

In past years, various studies have considered transdermal drug delivery system for improving patient compliance. One approach to deliver drug via transdermal route is transdermal patch. These patches include single-layer drug in adhesive patches and micro reservoir transdermal patch & matrix system. Acrylic-acid, hydroxypropyl methylcellulose (HPMC) and polyethylene glycol are commonly used polymers for manufacturing of transdermal patches. Characterization of patches includes patch thickness, weight uniformity, irritation studies, in-vitro drug release and permeation studies. This review summarizes various polymers, types of transdermal patches and evaluation of transdermal patches based on up-to-date data extracted from reputed journals and official websites.