Lookup NU author(s): Dr Emma Kampouraki,
Professor Farhad Kamali
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2017 Informa UK Limited, trading as Taylor & Francis Group Introduction: The effectiveness of oral anticoagulation therapy with warfarin (a vitamin K antagonist) in the treatment of thromboembolic disease, including stroke prophylaxis in patients with atrial fibrillation is well recognised. However, warfarin has a narrow therapeutic window and an unpredictable anticoagulation response, which make it difficult to achieve and maintain optimal anticoagulation. Various dietary factors, including sudden changes in eating patterns, can significantly alter anticoagulation control, thereby potentially exposing patients to the risk of bleeding or thromboembolic complications. Dietary vitamin K intake is a particularly important factor, given the mechanism of action of warfarin. Areas covered: In this article, we cover the sources of vitamin K and their potential effect of dietary vitamin K on anticoagulation response to warfarin. We also discuss the results of studies on the effect of vitamin K supplementation on anticoagulation stability. Expert commentary: A stable dietary vitamin K, promoted by daily oral vitamin K supplementation, can improve anticoagulation stability in patients on warfarin therapy. There is experimental evidence in animals that dietary vitamin K affects anticoagulation response to the direct thrombin inhibitor, ximelagatran. Whether dietary vitamin K affects anticoagulation response to the currently licensed direct oral anticoagulants (DOACs) in man remains to be investigated.
Author(s): Kampouraki E, Kamali F
Publication type: Article
Publication status: Published
Journal: Expert Review of Clinical Pharmacology
Online publication date: 21/06/2017
Acceptance date: 20/06/2017
Date deposited: 20/07/2017
ISSN (print): 1751-2433
ISSN (electronic): 1751-2441
Publisher: Taylor and Francis Ltd
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