There is no most effective medicine for gastric mucosa damage, and it needs to be treated according to the specific cause of gastric mucosa damage. You can use magnesium aluminum carbonate, omeprazole, colloidal bismuth pectin, bismuth potassium citrate and other drugs under the guidance of the doctor. 1. Magnesium aluminum carbonate: gastric mucous membrane protector, can be combined with pepsin and bile acid to help neutralize gastric acid, inhibit its activity, prevent gastric mucous membrane damage and maintain the barrier function. 2. Omeprazole: proton pump inhibitor, can inhibit gastric acid secretion and treat gastric mucosal damage. 3. Colloidal bismuth pectin: gastric mucous membrane protector, forming a film on gastric mucous membrane, stimulating gastric mucous membrane epithelial cells to secrete mucus to protect gastric mucous membrane. 4. Bismuth potassium citrate: in the acidic environment of the stomach, it forms a diffuse protective layer that covers the ulcer surface and prevents gastric acid and pepsin from attacking the gastric mucosa. It is recommended that patients with damaged gastric mucosa should go to regular hospitals in time and standardize the treatment under doctor’s guidance, so as not to delay the condition or cause adverse reactions.