Omeprazole (Omcare) 40mg Lyophilized Powder for Injection is a proton pump inhibitor (PPI) used to treat conditions like gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome. The 40mg powder is reconstituted with the included ampoule of diluent for intravenous (IV) administration. It works by reducing stomach acid production, providing rapid relief from acid-related symptoms and promoting healing of the stomach and esophagus lining. This formulation is typically used in hospital settings for patients who cannot take oral medications.