Losec Mups (Multiple Unit Pellet System) Tablets Contain Omeprazole As The Active Ingredient. Omeprazole Is A Proton Pump Inhibitor (Ppi) That Reduces Stomach Acid Production. It Is Used To Treat Acid-Related Gastrointestinal Conditions, Offering Relief From Symptoms Such As Heartburn And Acid Reflux. Active Ingredient: Omeprazole 10Mg Side Effects: Common: Headache, Nausea, Diarrhea, Abdominal Pain, And Constipation. Rare: Allergic Reactions, Liver Enzyme Changes, Or Severe Skin Reactions. Precautions: Do Not Use If Allergic To Omeprazole Or Other Ppis. Consult A Doctor If Pregnant, Breastfeeding, Or If You Have Severe Liver Disease. Long-Term Use May Increase The Risk Of Bone Fractures Or Vitamin B12 Deficiency.