Used primarily as a proton pump inhibitor to reduce stomach acid production. It is effective in treating conditions such as gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome. The (S)-enantiomer form offers improved metabolic stability and efficacy compared to the racemic mixture. It is often prescribed for long-term management of acid-related disorders and can help heal erosive esophagitis. Additionally, it is used in combination with antibiotics to eradicate Helicobacter pylori infections. The magnesium salt form enhances its stability and bioavailability, making it suitable for oral formulations. It may also be used to prevent NSAID-induced gastric ulcers.