This volume brings together the large body of recent research on metabolic drug interactions and their relevance in the treatment of diseases. The book focuses on human metabolic enzyme systems that have been shown in vitro to be predictive of drug interactions. Major sections present information on specific therapeutic classes of drugs as substrates, inhibitors, and inducers of metabolic enzymes. Other chapters discuss the clinical and pharmacoeconomic implications of metabolic drug interactions and the significance of in vitro metabolic studies in new drug development.