The pharmacological treatment of gastritis and gastric ulcer mainly includes gastric acid inhibition, protection of gastric mucosa, and anti-H. pylori, the treatment of which is both similar and different. Gastritis: 1. Acute gastritis: The treatment of acute gastritis is mainly to remove the cause, actively treat the primary disease and trauma, and correct the pathophysiological disorder caused by it. Drugs that inhibit gastric acid secretion, such as PPI (proton pump inhibitors) (e.g. omeprazole, lansoprazole, etc.), or H2 receptor antagonists (e.g. famotidine, ranitidine, etc.), gastric mucosal protective agents (e.g. bismuth: bismuth potassium citrate, etc., weak alkaline antacids: magnesium aluminum carbonate, aluminum thioglycollate, aluminum hydroxide gel, etc.) are commonly used to promote gastric mucosal repair and hemostasis. 2, chronic gastritis: most adults have mild non-atrophic gastritis of the gastric mucosa, such as Hp (Helicobacter pylori) negative and no erosion and no symptoms, may not be drug treatment. If Hp-positive, Hp eradication is required. The current program for the eradication of H. pylori is a quadruple therapy, i.e. 1 PPI + 2 antibiotics + 1 bismuth agent, with a course of 10-14 days. The commonly used antibiotics are clarithromycin, amoxicillin, metronidazole, etc. If the gastric mucosa nutritional factor deficiency can be supplemented with vitamin complex, and those with pernicious anemia need lifelong injection of vitamin B12. 3. Special types of gastritis: specific treatment according to their different conditions. Gastric ulcer: For the treatment of gastric ulcer, first assess the presence of H. pylori infection and the history of aspirin and NSAID consumption. If H. pylori infection is present, strive to eradicate the bacteria to the greatest extent possible and the ulcer will be cured. If aspirin or NSAIDs are taken, discontinue them as much as other medical conditions allow. In patients with multiple coexisting diseases or discontinuation of aspirin etc. may not be realistic, in which case strong acid inhibitors such as proton pump inhibitors need to be applied continuously, and mucosal protectors can also be added together to maintain treatment for ulcer healing or to reduce the chance of serious complications such as bleeding and perforation. In general, although there are similarities in the treatment of gastritis and gastric ulcer, the medication should be individualized according to the cause and condition of the patient.