Pantoprazole (Protonix) is a medication that treats conditions that cause too much stomach acid, like heartburn, stomach ulcers and reflux disease. 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 (Protonix) is a proton pump inhibitor (PPI) that lowers stomach acid. It treats erosive esophagitis, or damage to the esophagus caused by gastroesophageal reflux disease (GERD), in adults and certain children. Medscape - Gastric ulcer, GERD, heartburn-specific dosing for Protonix (pantoprazole), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation. 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. Protonix (Pantoprazole) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Pantoprazole is a proton pump inhibitor that decreases the amount of acid produced in the stomach. Pantoprazole 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. 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. Pantoprazole, sold under the brand name Protonix, among others, is a proton pump inhibitor medication used for the treatment of stomach ulcers, short-term treatment of erosive esophagitis due to gastroesophageal reflux disease (GERD), maintenance of healing of erosive esophagitis, and pathological hypersecretory conditions including Zollinger. 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.