Metronidazole tablets can not be directly plugged at the vagina, because it is an oral drug, vaginal plugging is not easy to melt, and can not play the proper effect. Metronidazole tablets in the treatment of gynecological diseases, mainly for the treatment of pelvic inflammatory disease, bacterial vaginitis, trichomonas vaginitis. Metronidazole tablets used as oral medication, not directly plug vaginal vaginal plugging the use of metronidazole is metronidazole suppositories, compound metronidazole suppositories, metronidazole vaginal effervescent tablets, etc., for different diseases using different drugs. Metronidazole tablets orally or vaginally after the use of metronidazole suppositories, there may be gastrointestinal reactions, a few may have allergic symptoms, allergic to the drug is prohibited. The use of the above drugs, it is recommended to use the drug under the guidance of a doctor, not blindly self-medication, in order to avoid adverse consequences.