Taking metronidazole effervescent tablets vaginal water is a normal phenomenon. Metronidazole effervescent tablets have anti-anaerobic bacteria and anti-trichomonas effect, mainly used for the treatment of senile vaginitis, trichomonas vaginitis and bacterial vaginitis. The use of metronidazole effervescent tablets vaginal water is normal leukorrhea, but also may be caused by more vaginal secretions, including there is inflammation of the tissue shedding and outflow, or the drug is absorbed after the drug is discharged out of the body of the drug residue. Some patients may experience nausea, vomiting, loss of appetite, abdominal cramps, headache, dizziness, numbness of the limbs and other symptoms, which do not affect the therapeutic effect. A few patients will induce urticaria, cystitis, dysuria, leukopenia and other diseases, but these diseases are reversible, and recover on their own after stopping the drug, and attention should be paid to keep the vulva clean and dry during use, and change underwear frequently.