You’ll need to have your blood tested on a regular schedule. Your
healthcare provider will tell you how often you need to have your blood tested. This
to make sure you’re taking the right amount of warfarin. Too much can cause excess
bleeding, which can be very serious. Too little may not prevent blood clots from harming
The blood tests check your international normalized ratio (INR) and
prothrombin time (PT). These show how quickly your blood clots. Together the test
You may need to visit a hospital or clinic to have your blood tested.
Or, a nurse may come to your home and test your blood. In some cases, you may be able
test your blood at home with a small machine. Talk with your healthcare provider to
out what’s best for you. Do not miss any appointments to get your blood tested. If
have a blood test outside of your healthcare provider’s office, make sure to call
her as soon as you get your test results.
After the blood test, your healthcare provider may tell you to change
your dose of warfarin. Take the medicine exactly as directed. Don’t stop taking it
unless your healthcare provider tells you to.