Nexium is used to treat GERD and other conditions involving excessive stomach acid. Learn about side effects, interactions and indications. Esomeprazole (Nexium) is a proton pump inhibitor (PPI). It lowers the amount of acid in your stomach by blocking the final step of stomach acid production. This helps relieve heartburn and other stomach problems. Esomeprazole (oral): side effects, dosage, interactions, FAQs, reviews. Used for: barrett's esophagus, duodenal ulcer prophylaxis, erosive esophagitis, gastric ulcer. 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. It can also relieve heartburn. Find patient medical information for Esomeprazole (Nexium) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Nexium: Uses, Dosage, Side Effects & Interaction Nexium is a drug used to treat damage to the esophagus and stomach from an increase in stomach acid. Side effects and negative reactions to Nexium are rare. Nexium, or esomeprazole, is a proton pump inhibitor. It is used to treat gastroesophageal reflux disease, duodenal ulcer disease, and erosive esophagitis. 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] It is taken by mouth or injection into a vein. [11] Common side. Description 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 is also used with antibiotics (eg, amoxicillin, clarithromycin) to treat ulcers that.