Pantoprazole is a proton pump inhibitor medication that decreases the amount of acid produced in the stomach. It is used to treat conditions caused by excess stomach acid, such as gastroesophageal reflux disease (GERD), ulcers, and Zollinger-Ellison syndrome. Pantoprazole can also be used to prevent ulcers from forming in people who are taking nonsteroidal anti-inflammatory drugs (NSAIDs). The medication is available in tablet and injection forms, and is usually taken once a day before a meal. It is important to follow the dosage instructions provided by a healthcare professional, and to report any side effects or concerns.