Eat warfarin if the blood in urine is mild, or prothrombinogen time has been significantly extended to more than 2.5 times the normal, should be reduced or discontinued; if the blood in urine is serious can be given vitamin k1 and other treatments, and if necessary, can be transfused with whole blood, plasma or prothrombinogen complex. Warfarin belongs to one of the commonly used anticoagulant drugs in the clinic, which is used to prevent and treat thrombosis. An overdose can easily lead to various kinds of bleeding. Bleeding can occur in any part of the body, especially in the urinary and gastrointestinal tracts, such as blood in the urine. Eating warfarin once blood in the urine, should immediately go to the hospital, as soon as possible to improve the monitoring of the international normalized ratio and other coagulation indicators, the professional physician to assess the severity of blood in the urine, etc., under the guidance of the professional physician to adjust the use of medication, do not deal with it privately, so as not to cause serious consequences.