Famotidine is used to treat Ulcers of the Stomach and Intestines and to Prevent Intestinal ulcers from coming back after they have healed.
Tell your doctor/Pharmacist your medical history, especially of: Immune system problems, Kidney problems, Liver problems, Lung problems (e.g., Asthma, Chronic obstructive pulmonary disease-COPD), other Stomach problems (e.g., Tumors). Older adults may be more sensitive to the side effects like Mental/Mood changes (such as Confusion), Seizure, or Unusual tiredness.
Headache, Constipation, or Diarrhea may occur. Serious side effects are Easy Bruising/Bleeding, signs of Infection (such as Sore throat that doesn’t go away, Fever, Chills), Mental/Mood changes (Restlessness, Confusion, Depression, allucinations) and Allergic reactions.