Metronidazole tablets can be taken after menstruation. Metronidazole tablets are mainly for the treatment of anaerobic bacterial infections, for gynecology can treat pelvic inflammatory disease, cervicitis, and trichomoniasis, bacterial vaginosis, can take metronidazole tablets to give the corresponding treatment, but should pay attention to the following issues: First, metronidazole tablets may lead to gastrointestinal reactions, so after taking will appear nausea, vomiting, anorexia, loss of appetite and other corresponding symptoms, It is best to take them after meals. Second, metronidazole should not be used for a long time, generally in the clinical application time should not exceed one week, because metronidazole will lead to a decrease in leukocytes, so that the body resistance to decline, so must be given according to medical advice.