The main medications for patients with gastritis and duodenitis include: 1. drugs to protect the gastric mucosa, commonly used drugs such as bismuth potassium citrate, aluminum thioglycollate, metsulin, and aluminum hydroxide gel, gastrin, etc. 2. drugs to adjust gastrointestinal motility, mainly including domperidone, trimethoprim, mosapride, etc. 3. antibiotics, if the causative factor is found to be Helicobacter pylori infection, clarithromycin, ampicillin, metronidazole, tinidazole, etc. 4, drugs to reduce gastric acid, such as magnesium aluminum carbonate, aluminum hydroxide, ranitidine, cimetidine, and omeprazole, lansoprazole, pantoprazole, etc. In addition, the main symptomatic treatment, such as abdominal pain is more serious patients can take oral painkillers, nausea, vomiting serious patients need to give anti-emetic drugs.