Metronidazole is good or take a week of good need to refer to the patient’s condition, some patients can be taken at once, some patients are recommended to follow a week of course of medication. If the trichomonas vaginitis patients, the treatment is generally recommended systemic medication, commonly used nitroimidazole drugs such as metronidazole, the initial infection is recommended to choose metronidazole tonic, the cure rate is high; such as trichomonas vaginitis patients in pregnancy, it is generally recommended that a week of course of treatment, to avoid the high blood concentration of the drug on the fetus has an adverse effect. If the bacterial vaginosis patients, the treatment can be local or systemic medication, preferred metronidazole, but does not recommend tonic, the effect is relatively poor, generally recommended oral one week or vaginal continuous use of medication for one week, if necessary, can be repeated. If the patient needs to use drugs, should follow the guidance of professional physicians, not self-medication, so as not to lead to adverse consequences.