Warfarin Dose Adjustment from INR and VKORC1

Calculate warfarin dose adjustment based on current INR, target INR range, and VKORC1/CYP2C9 genotype to achieve and maintain anticoagulation targets safely.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate warfarin dose adjustment based on current INR, target INR range, and VKORC1/CYP2C9 genotype to achieve and maintain anticoagulation targets safely

Each component has a specific meaning:

  • Current INR — The current inr recorded for the scenario being assessed.
  • Target INR range — The target inr range recorded for the scenario being assessed.
  • VKORC1/CYP2C9 genotype — The vkorc1/cyp2c9 genotype recorded for the scenario being assessed.

Note: Interpret the warfarin inr adjustment result against the thresholds and context described above.

How to Use

Enter the current INR, target INR range, VKORC1/CYP2C9 genotype for the scenario you are assessing. Calculate warfarin dose adjustment based on current INR, target INR range, and VKORC1/CYP2C9 genotype to achieve and maintain anticoagulation targets safely. Use the warfarin inr adjustment result to inform your calculation.

Frequently Asked Questions