While taking anticoagulants, the following situations expect patients to pay special attention to the following points: 1. Surgery: If you need surgery because of other illnesses, please be sure to tell your doctor that you are taking anticoagulants. The doctor will decide the timing and mode of surgery, as well as the choice of appropriate alternative treatment before and after surgery. 2.Pregnancy: Warfarin has a certain effect on the development of the fetus, and the blood is hypercoagulable during pregnancy, which is easy to make thrombus form on the valve. It is recommended that you consult a specialist in detail before you plan to get pregnant. 3.Pay attention to safety and avoid trauma. If there is a wound or bleeding from injection, compress the bleeding site for a long time. 4.If the manufacturer from which you purchased warfarin changes, please pay attention to recognize the dose of each tablet (there are 2.5 mg (domestic), 3 mg (imported) multiple dosage forms). Different manufacturers, between different dosage forms can not simply use the number of milligrams for equivalent calculations, after the replacement of the need to diligently check the INR, in order to grasp as soon as possible the amount of drug use. 5, try to avoid drinking alcohol. Tea is allowed. The effect of smoking on warfarin is uncertain. Do not take Chinese medicine at will. 6.Remember: it is very important to take medication on time and review regularly! Be sure to check diligently!