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Warfarin Dosing


Version 2.0 /  Future versions of this program will likely contain proprietary algorithms that will support daily dosing.   This current version provides general guidelines based on the information selected below.  The responses are derived from statements found in the 6th ACCP guidelines. In many cases direct quotes are used from this valuable reference.  Recent studies confirmed the importance of initiating warfarin therapy with lower doses (eg 5mg) as opposed to older protocols which advocated higher initial dosages (7.5 - 10mg).  

Updated sections led

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What is the range of INR's I should target?
Initial dose above 5 mg?
Does the patient have Protein C deficiency:
What should I do if the patient's INR is outside the therapeutic range?
Is the patient undergoing an invasive procedure?


The authors make no claims of the accuracy of the information contained herein; and these suggested doses are not a substitute for clinical judgment. Neither GlobalRPh Inc. nor any other party involved in the preparation of this program shall be liable for any special, consequential, or exemplary damages resulting in whole or part from any user’s use of or reliance upon this material.PLEASE READ THE DISCLAIMER CAREFULLY BEFORE ACCESSING OR USING THIS SITE. BY ACCESSING OR USING THIS SITE, YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS SET FORTH IN THE DISCLAIMER. Read the disclaimer