Thoroughly updated, the 3rd Edition of this popular text continues to take its fresh approach to studying pharmacology by examining drugs in the context of the diseases they are used to treat within each body system. Drug action is clearly explained at the molecular, cellular, tissue, and organ levels. Numerous high-quality, full-color illustrations, plus at-a-glance boxes and tables, help you to more easily understand the complex ways in which modern drugs are used to treat diseases. * New sections on drug treatments in special populations, including the elderly, children, and pregnant patients. * Online USMLE-style questions that help you review the material. * More than 600 superb conceptual illustrations which clarify complex material. * Key Fact summary boxes to help you make the most of your study time. * Adverse Effect boxes that highlight critical information.