it is an over-the-counter drug for gastric mucosal protection. After oral administration, it can form a protective film on gastric mucosa, stimulate gastric mucosal epithelial cells to secrete mucus, and increase the protective effect on mucosa. In addition, it can kill Helicobacter pylori and promote the healing of gastritis. Suitable for chronic gastritis. Other bismuth preparations should not be taken during the period of taking it, and it is not appropriate to take it in large quantities for a long time. And antibiotics and drugs to inhibit gastric acid, the effect will be better. As long as you take it according to the doctor's advice, there will be no obvious side effects.