This e-book provides an overview of current technologies used to increase the topical/transdermal delivery of drugs, its protocols, advantages and limitations. It includes exclusive chapters on chemical enhancers, Iontophoresis, Sonophoresis, Electroporation, Microneedles and the more recent use of micro/nanoparticles to deliver drugs throughout the skin. The e-book's generalized approach on the topic is aimed to be helpful in drug discovery, drug delivery and toxicological research and to provide a broader perspective on the topic to readers with respect to current literature available on the.