This is a box containing OMEBAK, which is a brand of Omeprazole presented as a lyophilized powder for infusion and injection. It contains 40mg of Omeprazole per vial and is intended for intravenous (I.V.) use only. Omeprazole belongs to a group of medicines called proton pump inhibitors (PPIs). PPIs work by reducing the amount of acid produced by the stomach. This formulation is likely used in situations where oral administration of Omeprazole is not feasible.