Esomeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers). It works by decreasing the amount of acid your stomach makes. It relieves symptoms such as heartburn, difficulty swallowing, and persistent cough.

Nexium contains a medicine called esomeprazole. This belongs to a group of medicines called 'proton pump inhibitors. They work by reducing the amount of acid that your stomach produces.