Nexium is used in the treatment of dyspepsia, peptic ulcer disease, gastroesophageal reflux disease and Zollinger-Ellison syndrome. It works by reducing gastric acid secretion and keeping its production under control.
Prevacid is a proton pump inhibitor which prevents the stomach from producing acid. Prevacid is used for the treatment of acid-related stomach and throat (esophagus) problems (e.g., acid reflux or GERD, ulcers, erosive esophagitis, Zollinger-Ellison syndrome).
Prilosec is taken to decrease the amount of acid produced in the stomach. It is effective for the treatment of gastric ulcer and gastroesophageal reflux disease (GERD), and for the short-term and maintenance treatment of erosive esophagitis.