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 subject. The book is an interesting source of information for pharmacy students, and pharmaceutical research and development units of universities and commercial industries.