Drugs have played a central role in the progress of human civilization. There are many important stages before a compound is used as a drug to treat a disease. This  book deals with the historical aspects of the development and use  of drugs, vitamins, hormones; their classification, synthesis and formulation; and  the  general  principles of drug actions.  The  pharmacokinetics,  the interaction  of drugs in the targeted receptor, and mode of drug  synthesis  is explained in detail.