Vitamin K Administration Guidelines

Emergency Reversal of Anticoagulation

For emergency reversal of warfarin-associated major bleeding, administer vitamin K 10 mg IV by slow injection, combined with prothrombin complex concentrate for rapid INR correction, as recommended by the American College of Chest Physicians 1
Administer 10 mg IV vitamin K by slow injection for life-threatening bleeding due to vitamin K antagonists, with a preference for IV over oral administration due to more rapid onset, according to the American College of Chest Physicians 1
Infuse slowly to minimize anaphylactoid reaction risk, which occurs in approximately 3 per 100,000 doses 2
Combine with four-factor prothrombin complex concentrate for rapid reversal, as the American College of Chest Physicians suggests that IV vitamin K is preferred over oral administration in emergency situations 2
The American College of Chest Physicians emphasizes that IV vitamin K is preferred over oral administration in emergency situations due to more rapid onset, though oral administration shows similar INR reduction by 24 hours 1

For patients receiving parenteral nutrition, a weekly IV supply of 250-500 mcg phylloquinone from lipid emulsions is sufficient to restore and maintain normal plasma levels, as recommended by Clinical Nutrition guidelines 3, 4
Adult multivitamin preparations providing additional 150 mcg cover requirements and maintain carboxylation status of non-coagulation proteins, according to Clinical Nutrition guidelines 3, 4
Caution should be exercised, as doses >150 mcg may cause vitamin K antagonist resistance in patients on warfarin, as noted in Clinical Nutrition guidelines 3, 4

For documented deficiency, oral vitamin K 1-2 mg daily for adults with fat malabsorption syndromes is recommended, as suggested by Obesity Reviews 5, 6
If oral supplementation fails, refer for specialist assessment and consideration of IM injections, according to Obesity Reviews 5, 6
Maintain zinc-to-copper ratio of 8-15:1 when supplementing, as high-dose vitamin E can exacerbate vitamin K deficiency, as noted in Obesity Reviews and Clinical Nutrition guidelines 5, 7

For reversal in children on warfarin, follow adult dosing algorithms based on INR, as recommended by Blood Advances 8
For INR >10 without bleeding, reverse with oral vitamin K, according to Blood Advances 8
For major bleeding at any INR, reverse rapidly with IV vitamin K plus activated prothrombin concentrate, as suggested by Blood Advances 8