Lifelong learning programs for all healthcare professionals, especially our physicians, place significant emphasis on diseases of the digestive, respiratory, and urogenital systems. This book covers the basic and clinical pharmacology of drugs used in the treatment of the aforementioned systems. Topics are supported by treatment regimens, drugs currently in the research phase, and the latest literature. Much of the information in the book is presented using figures and tables to make it easier to understand. We hope that this fifth book in the ACET Pharmacology series will be useful to both undergraduate and graduate students, as well as academics specializing in specific fields.