Furazolidone can treat H. pylori, and the bactericidal effect is also very good, because it has a very low resistance rate. But it needs to be applied in conjunction with several other drugs, not just this one alone. The side effects of furazolidone are more and more frequent, such as dizziness, headache, nausea, vomiting, diarrhea, postural hypotension, hypoglycemia, rash, asthma, polyneuritis and so on. In particular, polyneuritis is irreversible once it occurs. The drug needs to be applied in combination with acid-suppressive drugs, such as rabeprazole, esomeprazole, omeprazole, etc. It should also be applied with amoxicillin. If there is no penicillin allergy, you must choose to use amoxicillin because it has a very low resistance rate and is very effective in bactericidal effect. Finally, add a bismuth agent, such as bismuth potassium citrate. The above four drugs should be applied in combination and treated only with quadruple therapy.