Using a strong pathophysiology prototype approach to place drugs in context with how they are used therapeutically, this text gives students a clear picture of the importance of pharmacology to disease and ultimately to patient care. This holistic perspective to patient care is organized according to the body systems and diseases with complete information on the drug classifications used to treat the diseases. An easy to follow presentation and extensive pedagogical aids enable students to identify key ideas, understand concepts and apply essential components of anatomy, physiology and pathology relevant to drug therapy.