does vitamin k decrease prothrombin time heparin?
<answer> No, vitamin K does not influence the action of other blood thinners. <context> What do I need to know about Vitamin K, if I am taking warfarin (Coumadin)? Changes in the amount of vitamin K in the diet can alter the metabolism of warfarin (Coumadin ®). However, vitamin K does not influence the action of other blood thinners, such as heparin or low molecular weight heparins (Lovenox ®. Fragmin ®, or Innohep ®).