Othera 40 mg Tablet contains Esomeprazole, a potent proton pump inhibitor (PPI) that works by decreasing the amount of acid produced in the stomach. It is used for the treatment of several acid-related conditions, including gastroesophageal reflux disease (GERD), erosive esophagitis, and Zollinger-Ellison syndrome. Esomeprazole is also used in combination with antibiotics to eradicate Helicobacter pylori infections, which are commonly associated with gastric ulcers.