Formulation and evolution of micro-emulsion system of azithromycin is now firmly established as a worldwide best and highly recommended textbook for pharmacy and biomedical science students. It is successful broad coverage from principles of drug action to basis of their therapeutics use and skill of rational selection of micro-emulsion system of azithromycin. This book is a collection of fundamental concepts of the subjects, aiming at the safe and effective use of drugs in the treatment of drug discovery and development.It is basis of therapeutics uses of drug design and development. Highlights: .Reinforcement of evidence based use of medicine and development of drugs. .All effective basis of understanding of the drug mechanism to drug design. . Cost effective summarized methodology.