Omeprazole (Retapraz) 40mg Lyophilized Powder for Injection is a proton pump inhibitor used to treat conditions like gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome. The product comes in a pack with 1 vial of 40mg lyophilized (freeze-dried) powder and a diluent for reconstitution. Once reconstituted, the solution is administered intravenously to reduce stomach acid production, providing relief from acid-related symptoms. It is typically used in hospital settings for patients who are unable to take oral medications or need rapid acid suppression.