Pharmacology aims to provide a brief account of drug action, as either a study or revision aid. In doing this, the authors have generally taken a therapeutic area and considered the major classes of drugs, their actions and, to a limited degree, their uses. There are many excellent brief guides to pharmacology and so their second aim is to present a study guide which deals with molecular pharmacology at a more advanced level, so that the book is also useful for advanced pharmacology studied in the later years of pharmacy and science degrees. This study guide should therefore be useful at each level of undergraduate study