Metronidazole suppositories have anti-anaerobic bacteria and trichomonas, the use of which is to treat bacterial vaginosis, trichomonas vaginitis. Metronidazole suppositories are nitroimidazole derivatives, this drug not only has a strong anti-trichomonas effect, but also can inhibit bacterial deoxyribonucleic acid synthesis, interfering with bacterial growth and reproduction, so as to play a role in the destruction of anaerobic bacteria. Administered vaginally, it is commonly used clinically to treat bacterial vaginosis and trichomonas vaginitis. Adverse effects of metronidazole suppositories have not yet been clarified, this drug is prohibited for use in pregnant and lactating women, and during its use it may cause a dark red color of the urine, which can interfere with the diagnosis in terms of urine. This drug also inhibits the metabolism of alcohol, so it is necessary to abstain from alcohol during the use of the drug, so as not to cause abdominal pain, headache, vomiting and other symptoms. Metronidazole suppositories are prescription drugs, patients should not use the drug privately to avoid delaying the condition, must be directed by a professional doctor.