Nexium is a proton pump inhibitor that decreases the amount of acid produced in the stomach. Nexium is used to treat symptoms of gastroesophageal reflux disease (GERD) and other conditions involving excessive stomach acid such as Zollinger-Ellison syndrome. Find patient medical information for Esomeprazole (Nexium) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Nexium (Esomeprazole Magnesium) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Nexium® capsules are a brand of esomeprazole that treats conditions that cause too much stomach acid like stomach ulcers or reflux disease. It can relieve heartburn. Esomeprazole is used to treat conditions where there is too much acid in the stomach. It is used to treat duodenal and gastric ulcers, erosive esophagitis, gastroesophageal reflux disease (GERD), and Zollinger-Ellison syndrome, a condition wherein the stomach produces too much acid. Esomeprazole, sold under the brand name Nexium (or Neksium) among others, [2] is a medication which reduces stomach acid. [11] It is used to treat gastroesophageal reflux disease, peptic ulcer disease, and Zollinger–Ellison syndrome. [11][12] Its effectiveness is similar to that of other proton pump inhibitors (PPIs). [13] NEXIUM delayed-release capsules or NEXIUM for delayed-release oral suspension in combination with amoxicillin and clarithromycin is indicated for the treatment of adult patients with H. pylori.