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PT/INR Blood test

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The PT/INR test checks to see how fast your blood clots. Your healthcare provider will decide what PT/INR numbers are best for you. Your dose of COUMADIN will be adjusted to keep your PT/INR in a target range for you.

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What is the Coumadin blood test and what is it used for?	The blood test is called a PT/INR test. PT/INR stands for Prothrombin Time and International Normalized Ratio. These tests are used to see how quickly your blood clots and whether you’re getting the right amount of COUMADIN.
When is Coumadin (PT/INR) Test ordered?	If you are taking an anti-coagulant drug, your doctor will check your PT/INR regularly to make sure that your prescription is working properly and that your PT/INR is appropriately prolonged. There is no set frequency for doing the test. Your doctor will order them often enough to make sure that the drug is producing the desired effect - that it is increasing your clotting time to a therapeutic level without causing excessive bleeding or bruising.
How often do I have my blood tested?	Your healthcare provider will determine how often you will need blood tests. Your COUMADIN dosage may be carefully adjusted (raised or lowered) to keep your PT/INR level right for your condition. The results are usually available the same day. When you get these results, ask your healthcare provider if you will need to change your dosage of COUMADIN (Warfarin Sodium).
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