Nexium is used for treating heartburn and other symptoms of gastrointestinal reflux disease (GERD), as well as to reduce the occurrence of gastric ulcers. It is also prescribed to heal erosive esophagitis.
In combination with amoxicillin and clarithromycin, Nexium is used to treat H. pylori.
Full prescribing information is available at:
http://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?id=4761
Check out Wikipedia for more user-friendly information:
http://en.wikipedia.org/wiki/Nexium