Esomeprazole Magnesium Trihydrate Eq. to Esomeprazole 40mg is a medication primarily used to treat conditions like gastroesophageal reflux disease (GERD), stomach ulcers, and Zollinger-Ellison syndrome. Esomeprazole is a proton pump inhibitor (PPI) that works by reducing the amount of stomach acid produced. By blocking the proton pump in the stomach lining, it helps relieve symptoms such as heartburn, acid reflux, and irritation of the esophagus. The magnesium trihydrate form of esomeprazole enhances its absorption and bioavailability. This dosage strength of 40mg is typically prescribed for more severe conditions and is taken once daily before meals, offering effective long-term management of acid-related disorders.