Metronidazole is not able to treat rhinitis, metronidazole can be used for anaerobic infections and trichomoniasis vaginalis etc. Rhinitis is an inflammation of the nasal cavity caused by allergic factors, bacteria, viruses and other factors, and metronidazole mainly treats intestinal diseases and trichomoniasis, so there is no direct connection between rhinitis and metronidazole directly, and metronidazole will not be used to treat rhinitis. Viral infections caused by rhinitis and allergic rhinitis, do not need metronidazole treatment; secondary bacterial infections should be preferred penicillin or cephalosporin antibiotic treatment, generally do not need metronidazole treatment. Patients with rhinitis should be treated and medicated under the guidance of a doctor.