ORAL vitamin K (phytonadione, Mephyton) is now recommended to reverse warfarin's anticoagulant effects

January 1999

ORAL vitamin K (phytonadione, Mephyton) is now recommended to reverse warfarin's anticoagulant effects in many patients.

Experts used to recommend giving vitamin K by injection. But SQ injections can have an unpredictable and delayed effect...and IV injections can cause severe allergic reactions.

You can manage most patients by simply holding their warfarin dose...and giving oral vitamin K when appropriate to lower the INR.

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