Ranitidine can inhibit the secretion of gastric acid, gentamicin can inhibit bacterial growth, add up to take can treat gastritis caused by bacterial infection, relieve acid reflux and other symptoms. Ranitidine can inhibit the secretion of gastric acid and reduce the stimulation of gastric mucosa by gastric acid, which can relieve symptoms such as acid reflux and stomach pain caused by gastritis. Gentamicin can inhibit the growth of bacteria and relieve the inflammatory reaction of bacterial infectious gastritis. Taken together, the two drugs can enhance the therapeutic effect of gastritis, promote the repair of the gastric mucosa, and relieve the inflammatory reaction. Adverse reactions to ranitidine include tachycardia, vasculitis, acute interstitial nephritis. It is contraindicated for those who are allergic to the drug, pregnant as well as lactating women, and should be used with caution in patients with hepatic and renal insufficiency. Drugs such as aluminum sulfate may reduce the absorption of ranitidine, avoid taking them at the same time. Adverse reactions to gentamicin include hearing loss, tinnitus, and vertigo. It should be used with caution in people who are allergic to the drug, myasthenia gravis, and Parkinson’s patients. Children should be used with caution under the supervision of a doctor. If you need to use these two drugs to treat gastritis, you should use them wisely under the guidance of your doctor to avoid adverse reactions.