Presents a history of the discovery of drugs, including digitalis, aspirin, and sulfanilamide. Explains the mode of action of most major drugs. Explores the economical, ethical, and medical factors of drugs. Discusses the action of hormones, vitamins, enzymes, and other biocatalysts. Provides the reader with information on drugs in a clear and understandable manner. Valuable reading for anyone interested in the history, uses, and action of medications.