After taking kynurenine tablets for two days to stop bleeding, you also need to continue to take the medication so that the medication is not taken for too short a period of time, which may affect the therapeutic effect. Norethindrone tablets belong to a kind of progestin drug, can be used to treat abnormal uterine bleeding, menstrual disorders, endometriosis and other diseases. Used alone or in combination with estrogen, it can have the effect of inhibiting ovulation and can be used as a contraceptive. If the patient during the treatment of abnormal uterine bleeding, after taking the drug for two days, the efficacy of stopping bleeding, at this time, you can not stop using the drug, you can properly adjust the time of taking the drug and taking the dose of the drug, usually take the drug continuously for about 2 weeks. For patients with severe liver disease, pregnant women need to avoid taking this drug. Common adverse reactions are nausea, dizziness, tiredness and so on. During the period of taking kynurenine tablets, if the patient has abnormal physical discomfort, need to consult a doctor in time.