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INR Monitoring

If you are taking warfarin (Coumadin®, Jantoven®) or certain other oral blood-thinning medications, you will have to undergo blood tests to check your international normalized ratio (INR). This test checks to see how long it takes your blood to clot.
 
INR monitoring is an important test to make sure your dosage of blood-thinning medication is safe and effective. If your INR is too high, it means it takes a long time for your blood to clot and you could be at risk for uncontrollable bleeding. However, if your INR is too low, you have a higher risk of developing a blood clot and stroke.
 
(For more information on this type of blood monitoring, click INR. This article takes an in-depth look at when an INR test is used, how it is interpreted, and why it is important to make sure your reading is within the normal limits.)
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