Gastrobiotics is also known as Bismuth Compound Aluminum Acid Tablets in the clinic. The side effects of long-term consumption may cause gastrointestinal discomfort symptoms, central nervous system disorders and so on. 1. Gastrointestinal discomfort: long-term use of bismuth aluminate tablets may affect the digestive system, causing dry mouth, constipation, loose stools, diarrhea and gastrointestinal discomfort. 2. Central nervous disorder: patients taking bismuth aluminate tablets for a long time may affect the central nervous system, followed by insomnia, dizziness and other symptoms of central nervous disorder. It is forbidden for pregnant women, patients with renal insufficiency and those who are known to be allergic to any of the ingredients of this product. It is forbidden to drink alcohol and consume less fried and greasy food during the period of taking the medicine; it is normal for the feces to be black in color, and the dosage can be reduced if the feces are diluted. When Bismuth Aluminum Compound Tablets are used in combination with tetracyclines, it will interfere with the absorption of the latter. This product should be administered under the guidance of a doctor. If any discomfort occurs in the course of taking the medicine, please consult a doctor for examination and treatment in time, so as to avoid delaying the condition.