Pantoprazole is used for:

The short-term treatment (7 to 10 days) of severe inflammation and erosion of the esophagus due to gastroesophageal reflux disease (GERD, or stomach contents rising back into the esophagus) in adults. The injection is only used when the oral form of Pantoprazole cannot be taken. Pantoprazole is also used to treat certain conditions associated with Zollinger-Ellison syndrome and similar conditions.

Pantoprazole is a proton pump inhibitor. It reduces gastric acid secretion by blocking the final step of acid production by the stomach lining. This decreases the discomfort caused by the stomach contents rising back into the esophagus