Drugs are used in the diagnosis, alleviation, treatment, prevention or cure of disease. This is a book about drugs, how they came to be, and how they exert their 'magic'. Today we have drugs to protect against infectious diseases, to alleviate aches and pains, to allow new organs to replace the old, and for brain functions to be modified. Yet, for the most part the manner by which drugs are developed and by whom remains a mystery. Drugs are more than just a pill or liquid and some have markedly altered the path of civilization. The author has selected a sampling -- drugs that represent milestones in affecting our well-being and influenced social change.