The precautions for trichomoniasis treatment with metronidazole mainly include following the doctor’s instructions, paying attention to local cleanliness, and avoiding alcohol. 1. Follow the doctor’s instructions: metronidazole, mainly for the anti-anaerobic bacteria drugs, anti-trichomonas drugs, can be used for the treatment of trichomonas vaginitis, but should strictly follow the doctor’s instructions, to avoid gastrointestinal reactions, allergic reactions, and central nervous system symptoms, endangering the patient’s health. 2. Pay attention to local cleaning: trichomoniasis vaginitis if the use of metronidazole suppositories, in order to make the effect of the drug to play better, need to use the drug before the pubic area clean. 3. Avoid drinking alcohol: trichomoniasis patients in the use of metronidazole drug treatment, it is recommended that 3 days before the drug and 7 days after the drug do not drink alcohol, and do not consume food or drugs containing alcohol, in order to avoid adverse reactions. Metronidazole drug, pregnant and lactating women, children and alcoholics are prohibited. It is forbidden for those who are allergic to metronidazole or other nitroimidazole derivatives. For specific cases, it is recommended to consult a specialized doctor.