What is Axid AR (nizatidine)?
Nizatidine is in a group of drugs called histamine-2 blockers. Nizatidine works by decreasing the amount of acid the stomach produces. Nizatidine is used to treat ulcers in the stomach and intestines. Nizatidine also treats heartburn and erosive esophagitis caused by gastroesophageal reflux disease (GERD), a condition in which acid backs up from the stomach into the esophagus. Nizatidine may also be used for purposes not listed in this medication guide.