is protonix an antacid
omeprazole BRAND NAME: Protonix. DRUG CLASS AND MECHANISM: Pantoprazole is in a class of drugs called proton pump inhibitors (PPIs), which block the production of acid by the stomach. Other drugs in the same class include lansoprazole (Prevacid), omeprazole (Prilosec) and rabeprazole (Aciphex). Proton pump inhibitors are used for the treatment of conditions such as ulcers, gastroesophageal reflux disease (GERD) and Zollinger-Ellison syndrome that are caused by stomach acid. Frequently Asked Questions About Heartburn and Reflux 1. Let's start with the basics. Antacids neutralize excess stomach acid to relieve heartburn, sour stomach, acid indigestion, and stomach upset. They are sometimes prescribed to help relieve the pain of stomach and duodenal ulcers. Some antacids also contain simethicone, an ingredient that helps eliminate excess gas.