Pharmacology A female is on warfarin after her valve replacement surgery. All about warfarin are TRUE, EXCEPT: A Half-life is 36 hours B Crosses placenta C Contraindicated in hepatic failure D Inhibits all vitamin K dependent clotting factors 💡 Explanation A female is on warfarin after her valve replacement surgery. All about warfarin are TRUE, EXCEPT: ✓ Correct Answer: C. Contraindicated in hepatic failure