Atlas Three · Medicine Atlas · 01-modern

Warfarin

Vitamin K antagonist anticoagulant; inhibits VKORC1 → depletes γ-carboxylated clotting factors II, VII, IX, X. Narrow therapeutic index (INR 2–3); major food/drug interactions via CYP2C9/VKORC1. Cornerstone of AF stroke prevention for 60+ years.

Also known as: warfarin, Coumadin, Jantoven, Marevan, (RS)-4-hydroxy-3-(3-oxo-1-phenylbutyl)-2H-chromen-2-one

01-modernStream
Route
draftStatus
2026-06-06Last Reviewed
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warfarin

Warfarin

Vitamin K antagonist anticoagulant; inhibits VKORC1 → depletes γ-carboxylated clotting factors II, VII, IX, X. Narrow therapeutic index (INR 2–3); major food/drug interactions via CYP2C9/VKORC1. Cornerstone of AF stroke prevention for 60+ years.