Pantoprazole, brand name Protonix, is a drug that belongs to the class of drugs called proton pump inhibitors (PPIs). Protonix is used for the treatment of GERD (gastroesophageal reflux disease), stomach (peptic) and duodenum ulcers, and Zollinger-Ellison syndrome. Learn about the side effects of Protonix (pantoprazole), from common to rare, for consumers and healthcare professionals. Protonix is a proton pump inhibitor that decreases the amount of acid produced in the stomach. Protonix is used to treat erosive esophagitis (damage to the esophagus from stomach acid caused by gastroesophageal reflux disease, or GERD) in adults and children who are at least 5 years old. Because PROTONIX was not shown to be effective in the randomized, placebo-controlled study in this age group, the use of PROTONIX for treatment of symptomatic GERD in infants less than 1 year of age is not indicated. Overview: Pantoprazole is used to treat acid reflux and other conditions where you have too much acid in your stomach. It works by reducing how much acid your stomach makes and usually takes a few. Pantoprazole is used to treat certain conditions in which there is too much acid in the stomach. It is used to treat erosive esophagitis or heartburn caused by gastroesophageal reflux disease (GERD), a condition where the acid in the stomach washes back up into the esophagus. Medscape - Gastric ulcer, GERD, heartburn-specific dosing for Protonix (pantoprazole), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation. Access information designed for healthcare professionals, including details about Pfizer medicines and patient support materials. Pfizer RxPathways connects eligible patients to a range of assistance programs that offer insurance support, co-pay help, and medicines for free or at a savings. Protonix (Pantoprazole) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Pantoprazole (Protonix) is a medication that treats conditions that cause too much stomach acid, like heartburn, stomach ulcers and reflux disease.