Which of the following medications prevents coagulation by antagonizing the effects of vitamin K?
A) Streptokinase (Streptase)
B) Heparin
C) Aspirin
D) Warfarin (Coumadin)

Question

Quizplus · Accepted Answer

Warfarin (Coumadin) prevents coagulation by antagonizing the effects of vitamin K. This is achieved by inhibiting the enzyme vitamin K epoxide reductase, which is responsible for recycling vitamin K in the liver. As a result, warfarin blocks the synthesis of clotting factors II, VII, IX, and X, leading to an anticoagulant effect.

Which of the Following Medications Prevents Coagulation by Antagonizing the Effects