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

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

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.

Many patients can be managed simply by holding their warfarin dose and giving oral vitamin K to decrease bleeding times.

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