You can take metronidazole tablets when you are having your period. Metronidazole tablets are antibiotic medications that are mainly used to treat anaerobic infections. Taking metronidazole tablets during menstruation will not affect the pituitary-ovarian axis and therefore will not affect menstruation. In addition, if you suffer from endometritis and other gynecological diseases, you can also take metronidazole tablets during menstruation for treatment, which can better treat the condition. During menstruation, women should do a good job of keeping warm, avoid eating cold, stimulating food, to ensure sufficient rest time, and menstrual resistance is weaker, should be after meals to take metronidazole tablets, to avoid causing nausea, vomiting, loss of appetite and other gastrointestinal symptoms. When the use of drugs appear adverse reactions, the use of drugs should be stopped, and promptly go to the hospital for examination and treatment. Patients with active central nervous system diseases, patients with blood diseases, pregnant and lactating women are prohibited to use this product. Smoking and alcohol should be abstained from during the use of the drug. The urine is dark red during the use of the drug, and can be restored by stopping the drug. The drug should be used correctly according to the condition and under the guidance of a doctor.