Quadruplex is a term for the eradication of H. pylori, not a requirement for the treatment of gastritis, which can be treated by applying quadruplex therapy in combination with H. pylori infection. Quadruple therapy refers to the use of two antibiotics combined with bismuth and proton pump inhibitors for treatment. 1. Antibiotics: commonly used drugs include amoxicillin, clarithromycin, metronidazole, furazolidone, etc., which are used to treat H. pylori infection, kill the pathogen and reduce the production of drug-resistant strains. 2. Bismuth: such as bismuth potassium citrate, colloidal bismuth pectin, etc., blocking gastric acid, pepsin on the gastric mucosa invasion damage, at the same time can be wrapped around the bacteria, interfering with the metabolism of Hp, to play a bactericidal role. 3. Proton pump inhibitors: such as omeprazole, rabeprazole and other drugs, used to inhibit the secretion of gastric acid, reduce the erosion of gastric acid on the gastric mucosa. If gastritis and other diseases need to be treated, it is recommended to consult a doctor and standardize the use of drugs under his guidance.