Bismuth Compound Aluminum Acid Granules has side effects on stomach. The side effects of Bismuth Compound Aluminum Acid Granules are mainly manifested in the gastrointestinal tract, such as constipation, scanty stool, dry mouth, insomnia, nausea, diarrhea and other symptoms, which usually disappear on their own after stopping the drug. Bismuth Aluminate Granules is an antacid astringent, which is mainly used for the treatment of gastric ulcer, duodenal ulcer, chronic superficial gastritis, hyperacidity, duodenal bulbitis and other diseases. It should be noted that patients who are allergic to the ingredients contained in bismuth aluminate granules are prohibited, renal insufficiency is prohibited, pregnant and lactating women are prohibited, and the use of children and elderly patients is not clear. There is no need to contraindicate food during the period of taking the medicine, but patients with serious gastric problems should abstain from alcohol and eat less fried and greasy food. The black color of feces is a normal phenomenon. If you need to use bismuth aluminate granules, it is recommended to consult a professional doctor and follow the doctor’s instructions for standardized treatment, not blindly use the drug at will.