The discovery of proton pump inhibitors (PPIs) and their development over the years has dramatically changed the management of acid-related diseases. Today, the therapeutic domain of PPIs ranges from relief of symptoms to cure of mucosal lesions in the upper gastrointestinal tract. PPIs are among the most widely sold drugs in the world and are now even available as over-the-counter medication. This publication presents the experience of the last 25 years during which PPIs have become of enormous value in gastroenterology. The authors provide an update on a variety of subjects, starting with an introduction to the discovery and development of PPIs. This is followed by chapters on pharmacokinetics, pharmacodynamics and pharmacogenetics, gastroesophageal reflux disease, gastroprotection, Helicobacter pylori eradication treatment, peptic ulcer disease, functional dyspepsia, acid suppression in exocrine pancreatic insufficiency, and gastrointestinal and systemic side effects. Readers who are interested in a current overview of PPIs and their various applications will find this book of great value.