Which of the following anticoagulant medications works by inhibiting the synthesis of vitamin K-dependent clotting factors in the liver?

A Warfarin ✓
B Heparin
C Aspirin
D Ticlopidine

Explanation

Warfarin works by inhibiting the synthesis of vitamin K-dependent clotting factors in the liver, which includes factors II, VII, IX, and X.

Source

Harrison's Principles of Internal Medicine
Hematology Hematology: Coagulation Disorders Hematology: Coagulation Disorders Hard MEDICAL Confidence: high