COVID 19 Update
PT/INR Home Testing

What is the normal INR range?

A person taking the anticoagulant (blood thinner) Coumadin® or “warfarin” should maintain an INR within the safe therapeutic range prescribed by their doctor. Most commonly patients will be prescribed a therapeutic range of (INR) 2.0 – 3.0 and patients with a mechanical heart valve will often have a therapeutic range that is higher than this.

A person NOT taking anticoagulants should have an INR range between 0.8 to 1.2.o.

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