The three commonly used drugs for gastric ulcers are incorrect, the treatment of gastric ulcers is mainly divided into causative and symptomatic treatment, and the drugs used include drugs to inhibit the secretion of gastric acid, drugs for the eradication of Helicobacter pylori, and drugs for the protection of the gastric mucosa such as omeprazole, clarithromycin, amoxicillin, and bismuth potassium citrate. 1. Treatment of the cause: Helicobacter pylori infection is one of the important factors of gastric ulcer, which can lead to the damage of gastric mucosa and erosion of gastric acid leading to erosion and ulcer. At present, a quadruple regimen containing bismuth is advocated, i.e., 1 proton pump inhibitor + 2 antibiotics and 1 bismuth etc.. The quadruple regimen of bismuth can effectively inhibit the secretion of gastric acid and kill the pathogenic bacteria in the stomach to protect the ulcer surface. Such as omeprazole, clarithromycin, amoxicillin, bismuth potassium citrate. 2. Symptomatic treatment: (1) Drugs that inhibit gastric acid secretion: such as omeprazole, which can inhibit gastric acid secretion and prevent gastric acid from corroding the ulcer surface of the stomach. It is forbidden for patients who are allergic to omeprazole, and headache, constipation, abdominal distension, osteoporosis and other adverse reactions may occur after taking the drug. (2) Drugs to protect gastric mucosa: such as bismuth potassium citrate, a gastric mucosa protector, can cover the surface of ulcers and block the invasive damage of gastric acid to the mucosa. Renal dysfunction is contraindicated, after taking the drug can be seen in the tongue and feces become black, short-term use of blood bismuth concentration will increase. The use of drugs need to follow the principle of individualization, different patients are suitable for different drugs, should be under the guidance of the doctor to choose the appropriate drug therapy. Gastric ulcer patients should go to the hospital if they have any discomfort after taking the medication.