Patient: description: had a caesarean section, department: unfilled, unfilled drug name: warfarin, take instructions: eat a piece after dinner blood sugar fasting 6.2, the other is afraid of the international Hua standard value is always not to the online 2.0 please ask how long to take warfarin, Beijing Dongzhimen Hospital Peripheral Vascular Surgery Department Qin Jianhui: check whether there are defects in coagulation, including protein C protein S, etc., if there is no problem If there is no problem, review the lower extremity venous ultrasound, check the D-dimer, if they are in the normal range, Warfarin can be used for three months. You should pay attention to avoid standing for a long time and try to elevate the lower limbs when at rest.