Tell all medical doctors and dentists you go to that you are taking this medicine.
Always check with your health care professional before you start or stop taking any other medicine. This includes any nonprescription (over-the-counter [OTC]) medicine, even aspirin. Other medicines may change the way this medicine affects your body
Your doctor should check your progress at regular visits. A blood test must be taken regularly to see how fast your blood is clotting. This will help your doctor decide how much medicine you need.