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  1. Prothrombin Time (PT/INR) Test - Cleveland Clinic

    Apr 29, 2024 · The normal ranges for PT/INR results are: 11 to 13.5 seconds. INR of 0.8 to 1.1. INR of 2.0 to 3.0 if you’re taking warfarin. (There are some conditions for which a higher or lower target PT …

  2. What Is a Normal INR Level and Its Target Ranges?

    Aug 21, 2025 · For healthy individuals not taking medications that affect blood clotting, a normal INR level typically falls between 0.8 and 1.2. This range indicates expected clotting time.

  3. Prothrombin time test - Mayo Clinic

    Dec 3, 2024 · In people without health conditions, an INR of 1.1 or below is considered typical.

  4. Understanding the International Normalized Ratio (INR) Test

    For most people, a normal INR range falls between 0.8 and 1.2. However, if you are taking blood-thinning medications like warfarin, your target INR range is typically higher, usually between 2.0 and …

  5. International Normalized Ratio | OSF HealthCare

    The international normalized ratio (INR) is a standardized number that's figured out in the lab. If you take blood thinners, also called anticlotting medicines or anticoagulants, it may be important to check your …

  6. Prothrombin Time: Reference Range, Interpretation, Collection and …

    Oct 22, 2025 · Normal values include the following [1] : Possible critical values are as follows [1] : Studies confirm that PT and INR reference intervals can vary with age and sex, with some populations...

  7. Understanding coagulation monitoring - Roche Diagnostics USA

    4 days ago · An INR of 1 is normal in healthy individuals who are not taking anticoagulants 5 An INR of 2 means that your blood takes twice as long to clot as normal 5 The therapeutic INR range for patients …

  8. PT (Prothrombin Time) and INR - MLabs

    Jul 23, 2025 · Recommended therapeutic ranges for oral anticoagulant therapy: INR 1.2 - 1.5 Prevention of catheter-related venous thrombosis; INR 2.0 - 3.0 Treatment of venous or pulmonary embolism, …

  9. Understanding Normal INR Levels for Optimal Health Management

    Jun 1, 2025 · For most patients on warfarin therapy for atrial fibrillation or venous thromboembolism, the target INR range is usually between 2.0 and 3.0. For patients with mechanical heart valves, a higher …

  10. PT, PTT, and INR Blood Tests: Purpose and Normal Ranges

    Jan 19, 2024 · Find out what PT/INR and PTT blood tests are, what the results mean, and how what you do can affect the outcomes of these blood tests.