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. Stop acid reflux before it starts with Nexium 24HR. Treat frequent heartburn with a pill or tablet that provides you 24-hour relief from your symptoms. 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, 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] Find patient medical information for Esomeprazole (Nexium) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Esomeprazole is used to treat symptoms of gastroesophageal reflux disease (GERD) and other conditions involving excessive stomach acid such as Zollinger-Ellison syndrome. Esomeprazole is also used to promote healing of erosive esophagitis (damage to your esophagus caused by stomach acid). NEXIUM is a prescription medicine called a proton pump inhibitor (PPI). NEXIUM reduces the amount of acid in your stomach. NEXIUM is used in adults: •for 4 to 8 weeks to treat the symptoms of gastroesophageal reflux disease (GERD). Nexium (Esomeprazole Magnesium) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. 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. Nexium, or esomeprazole, is a proton pump inhibitor. It is used to treat gastroesophageal reflux disease, duodenal ulcer disease, and erosive esophagitis.