It is usually possible to check for H. pylori two weeks after stopping medication with acid suppressants. When patients undergo H. pylori examination, they usually need to stop using acid-suppressing drugs, such as omeprazole enteric-coated capsules, cimetidine tablets, etc., 2 weeks before the examination, which can reduce the concentration of gastric acid in the stomach and inhibit the activity of H. pylori, and it is easy to have false negatives when doing the C13 and C14 breath test, which can lead to a missed diagnosis. Patients also need to stop taking antibiotics, such as amoxicillin, metronidazole, clarithromycin, etc., within 1 month before doing the H. pylori test to prevent false-negative situations; fasting for about 8 hours before the test is usually needed to avoid interfering with the test results. If a patient has a positive test result for H. pylori, it is recommended that standardized treatment be carried out as soon as possible in order to reduce the adverse effects of the disease.