Lizudra is a gastric mucosal protective agent, which forms a layer on the gastric mucosa forming a diffuse protective layer, so that it can effectively prevent damage to the gastric mucosa from stomach acid, digestive enzymes and food. The drug also has the effect of reducing the activity of pepsin and increasing the secretion of mucinase, which is also one of its mechanisms for protecting the gastric mucosa. Therefore, its main indications are gastric and duodenal ulcers, acute erosive gastritis, etc. Also, because the drug can also kill Helicobacter pylori, it is one of the four consecutive drugs used to eradicate H. pylori. Dosage: 0.3g at a time has good safety, with few adverse reactions with regular use and occasional transient side effects, such as ammonia taste in the mouth, grayish-black tongue and stool, nausea, vomiting, poor appetite, diarrhea, constipation, headache, dizziness, insomnia, etc.