The uncoordinated use of the metric system by different scientific and engineering disciplines, particularly in the late 19th century, resulted in different choices of base units even though all were based on the same definitions of the metre and the kilogram.
Traditionally, patients taking warfarin have been advised to avoid vitamin K to prevent excess clotting. Surprisingly, scientists have now discovered that regular consumption of a modest amount of vitamin K actually helps stabilize the anticoagulant effects of warfarin. Vitamin K intake may thus help individuals using warfarin achieve the therapeutic benefits of the drugâwithout danger of clots or bleeding.
The alteration of this substance reduces or enhances the effect of another drug that is being taken. The drug interaction between warfarin (Coumadin) and vitamin K-containing products is a good example of this type of interaction. Warfarin acts by reducing the concentration of the active form of vitamin K in the body.Therefore, when vitamin K is taken, it reduces the effect of warfarin.n interaction can result when there is an increase or decrease in: 1  the absorption of a drug into the body; 2  distribution of the drug within the body; 3  alterations made to the drug by the body (metabolism); and. 4  elimination of the drug from the body.