Metronidazole can treat rhinitis secondary to anaerobic infections, not suitable for all patients with rhinitis, it is recommended that patients follow the doctor’s instructions to use the drug. Metronidazole is a kind of anti-anaerobic drug, anti-trichomonas drug, so patients with rhinitis secondary to anaerobic infection, you can follow the doctor’s advice to apply metronidazole treatment. However, for patients with rhinitis caused by viral infections, exposure to allergenic substances and other factors, the application of metronidazole can not treat the disease, or even aggravate the condition due to the indiscriminate use of drugs, which requires attention. Metronidazole is contraindicated for pregnant women, lactating women, alcoholics and people with active central nervous system disorders and blood diseases. If you are allergic to metronidazole or other nitroimidazole derivatives, the application of metronidazole is also contraindicated. For rhinitis, saline rinsing of the nasal cavity is commonly used in the clinic, but also the application of budesonide, mometasone furoate and other intranasal hormone therapy. It is recommended that patients with rhinitis should consult a doctor for examination, and follow the doctor’s instructions to use medication after the cause of the disease is clearly defined, and should not indiscriminately use metronidazole or other drugs or prescriptions on their own.