Gastric ulcer generally does not require quadruple drug therapy, gastric ulcer quadruple drug is mainly for the eradication of H. pylori bacteria used in the four drugs, eradication of H. pylori infection of gastric ulcer of the four drugs include the following: the first drug is a drug to inhibit the secretion of gastric acid, such as omeprazole enteric tablets; the second drug is a drug to protect the gastric mucosa, such as bismuth potassium citrate; the third drug and the fourth drug for two antibiotics, such as amoxicillin capsules and furazolidone tablets. The oral course of these four drugs is 14 days, and the oral 14 days to stop using drugs 1 month later to review the H. pylori.