Dexilant (dexlansoprazole) is a proton pump inhibitor used to treat gastroesophageal reflux disease (GERD) and other conditions caused by excess stomach acid. It works by reducing the production of stomach acid, providing relief from heartburn, acid reflux, and damage to the esophagus. Dexilant helps heal erosive esophagitis and maintain symptom resolution. This medication is prescribed for short-term and long-term treatment of GERD and related symptoms.