Heart Disease Channel
Topics
Medications
Quicklinks
Related Channels

INR

Interpreting the International Normalized Ratio

Typically, a healthy person who is not taking a blood-thinning medicine will have an INR of about 1 (the usual range is from 0.8 to 1.2). A person taking warfarin will generally have a higher INR value. As the warfarin dosage is increased, a person's INR should also increase. The higher the INR, the longer it takes the blood to clot. This can help prevent blood clots that may lead to strokes. However, if the INR is too high, there is a risk for uncontrolled bleeding.
 
Recommended target INR and goal ranges are based on a person's reason for taking the medication. These ranges are as follows:
 
  • 2 to 3 -- the typical range for most "blood-thinning" needs
  • 2.5 to 3 -- the desired range for people who have a high risk for developing a blood clot.
 
Talk to your healthcare provider if you have questions about your own personal INR goal range. Ranges are individualized according to your particular medical history.
 
Your healthcare provider will use your international normalized ratio to adjust your anticoagulant dosage. Do not adjust your dose unless your healthcare provider specifically tells you to do so.
 

How Often Should INR Be Checked?

When a person begins taking an anticoagulant medication, the INR value is checked frequently (two to three times per week). Once a person is stabilized on the medicine, INR tests are generally less frequent (ideally once or twice per month).
 
Ouch! 6 Types of Pain You Might Experience When Getting a Stent
Terms of Use
Advertise with Us
Contact Us
About eMedTV
Privacy Policy
Copyright © 2006-2017 Clinaero, Inc.
eMedTV serves only as an informational resource. This site does not dispense medical advice or advice of any kind. Site users seeking medical advice about their specific situation should consult with their own physician. Click Terms of Use for more information.