Nexum 40 mg Capsule is a prescription medication produced by Square Pharmaceuticals Ltd., containing Esomeprazole Magnesium Trihydrate. As a proton pump inhibitor (PPI), it effectively reduces stomach acid production, making it suitable for treating various acid-related gastrointestinal conditions. These include gastroesophageal reflux disease (GERD), erosive esophagitis, peptic ulcers, and prevention of gastric ulcers associated with NSAID use. Additionally, it is used in combination therapy for the eradication of Helicobacter pylori infections and management of Zollinger-Ellison syndrome, a condition characterized by excessive acid secretion. The capsule's enteric-coated formulation ensures that the active ingredient is released in the intestine, enhancing its efficacy and minimizing degradation by stomach acid