Patients with gastric erosion can take bismuth potassium citrate, which is a gastric mucosal protective agent, and its main function is to protect the gastric mucosa and promote the repair of the gastric mucosa. Bismuth citrate potassium has a therapeutic effect on gastric erosion because the protective barrier of gastric mucosa is damaged and the ulcer surface appears. The use of bismuth citrate potassium alone is not particularly effective in the treatment of celiac disease, so it is best to combine it with other drugs, such as lansoprazole, which can inhibit the secretion of gastric acid and reduce the invasion of the gastric mucosa, thus improving the therapeutic effect of bismuth citrate potassium. Some people who suffer from gastric erosion caused by Helicobacter pylori infection should use bismuth citrate potassium in combination with antibiotic drugs, such as amoxicillin and clarithromycin. And try to use bismuth citrate potassium before meals, so that the effect of protecting the gastric mucosa will be better.