Anti-inflammatory drugs generally refer to antibiotic drugs, which are used to treat bacterial infectious inflammation. Gastritis is mostly caused by Helicobacter pylori, which can be applied to drugs such as clarithromycin, metronidazole and amoxicillin. 1. Clarithromycin: Clarithromycin is a macrolide antibiotic drug, which is suitable for lung respiratory tract infections, skin and soft tissue infections and gastritis caused by Helicobacter pylori. It can cause abdominal pain, diarrhea, nausea, vomiting and other adverse reactions, and can not be used in combination with astemizole, cisapride and other drugs. 2. Metronidazole: Metronidazole is an anti-anaerobic drug for gastrointestinal inflammation and extraintestinal amebiasis and other infectious diseases, nausea, vomiting, headache, dizziness, rash and other adverse reactions can occur after use, pregnant women, blood diseases, alcoholism is prohibited. 3. Amoxicillin: Amoxicillin is a β-lactam antibiotic, penicillin, can be applied to the respiratory tract, genitourinary system, Helicobacter pylori infection disease. After using the drug can cause gastrointestinal reactions, skin rash, drug fever and other adverse reactions, penicillin allergy is prohibited. The above antibiotics for drugs, bile reflux and other factors caused by gastritis is not symptomatic, applied to the Helicobacter pylori infection caused by gastritis patients need to be combined application, the specific use of medication and selection of medical advice. If the patient is suspected of gastritis, it is recommended to improve the relevant examination, after a clear diagnosis of standardized treatment, the above drugs need to be applied under the guidance of a physician, not unauthorized use of drugs.