Clarithromycin for Helicobacter pylori infection is usually taken after meals, twice a day, 0.5g each time. Clarithromycin for Helicobacter pylori is generally used in combination with amoxicillin, omeprazole, and colloidal pectin secret for the treatment of Helicobacter pylori infection. Clarithromycin is usually taken after meals, twice a day, 0.5g each time. combined application for 14 days. Regular review after treatment. Digestive system symptoms such as nausea, abdominal pain, diarrhea, heartburn, etc. may occur when applying clarithromycin treatment; allergic reactions, drug rash, hives, etc. may occur; central nervous system side effects, dizziness, insomnia, etc. may occur. It is forbidden for those who are allergic to this drug, pregnant and lactating women, those with severe liver and kidney dysfunction, and those with severe heart disease. When gastrointestinal symptoms and allergic reactions occur during the application of Clarithromycin treatment, go to the hospital in time for examination, clarify the cause of the disease and give targeted treatment.