Metronidazole effervescent tablets of metronidazole belongs to the nitroimidazole class of antibacterial drugs, with strong antibacterial activity against anaerobic bacteria, and also has a strong antiprotozoal effect on protozoa, including Trichomonas, amoebas and Giardia lamblia. It is clinically used for vaginitis caused by trichomonas infection and anaerobic infection. Allergic reactions have been observed in a small number of patients with the drug. This product is contraindicated in people who are allergic to it. Wash your hands before using the medicine, put on gloves or finger cots and put the medicine deep into the vagina. Avoid menstruation, pay extra attention to hygiene, avoid intercourse or use condoms. If the adverse reaction is obvious after using the medicine, you should stop the medicine, wash off the medicine, and go to the hospital in time. Patients should use the medication under the guidance of a professional physician and strictly follow the medical advice.