Patients metronidazole effervescent tablets put into the vagina generally have no reaction, a small number of people may feel vulvar tingling, burning, itching and so on. Metronidazole effervescent tablets belong to the synthetic nitroimidazole compounds, both for the anti-trichomonas treatment, but also has a good anti-anaerobic effect. Metronidazole effervescent tablets can be put into the vagina, most patients have no reaction when put into the vagina, a small number of people may feel tingling, burning and itching on the vulva. Used to treat trichomoniasis or bacterial vaginosis, the medication acts directly on the trichomonas or pathogenic flora in the vagina. Metronidazole Vaginal Effervescent Tablets disintegrate easily after being placed in the vagina and work better on the vaginal mucosa. Patients are prohibited from sexual intercourse during the use of metronidazole effervescent tablets; the diagnosis should be clarified before the use of the drug, and the drug should be discontinued for 3 to 4 days after the end of the course of treatment for review, and can be repeated if necessary; it is not advisable to use this drug in early pregnancy.