Nexium (Esomeprazole) works by blocking acid production in the stomach.
This medication is known as a proton pump inhibitor (PPI). It is used
to treat acid-related stomach and throat (esophagus) problems (e.g., acid
reflux or GERD, erosive esophagitis). This medication may also be used in
combination with antibiotics to treat certain types of intestinal ulcers
caused by bacterial infection.