Losec MUPS 20mg is a prescription medication containing omeprazole, available in a pack of 14 tablets. It belongs to a class of drugs known as proton pump inhibitors (PPIs) and is used to reduce stomach acid production. MUPS stands for Multiple Unit Pellet System, which is a specialized delivery system that helps provide consistent drug release. The tablets should be taken as directed by your healthcare provider. Store in a cool, dry place away from direct sunlight. This is a prescription medication that should only be used under medical supervision.