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Letters |15 September 2009

Vitamin K to Correct Overanticoagulation

Mark W. Swaim, MD, PhD; B. Gail Macik

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Potential Financial Conflicts of Interest: None disclosed.
  • From Regional Hospital of Jackson, Jackson, TN 38305.
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Potential Financial Conflicts of Interest: None disclosed.
TO THE EDITOR:
In their recent study on managing supratherapeutic warfarin administration with or without vitamin K, Crowther and colleagues (1) use flawed methodology to arrive at what may be an apocryphal conclusion, which is that vitamin K therapy has no role in managing patients with high international normalized ratios (INRs).
The study uses a commercially unavailable vitamin K preparation. The pharmacokinetics and effectiveness of this preparation have not been clinically validated.
Confronted with overanticoagulation, clinicians explore recent relevant events; exclude patient dosing errors; consider vitamin K; and most important, modify doses of...
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Swaim MW, Macik BG. Vitamin K to Correct Overanticoagulation. Ann Intern Med. 2009;151:432–433. doi: https://doi.org/10.7326/0003-4819-151-6-200909150-00016

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Published: Ann Intern Med. 2009;151(6):432-433.

DOI: 10.7326/0003-4819-151-6-200909150-00016

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Print ISSN: 0003-4819 | Online ISSN: 1539-3704

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