Are warfarin and coumadin the same?

Yes. Warfarin is the generic name of the drug, and Coumadin is one brand name for the same medication (warfarin). Other brands (in some places) include Jantoven and Marevan. The active ingredient is the same; differences are mainly in tablet color/shape and inactive ingredients.

What this means:
- They are the same medicine and produce the same anticoagulant effect.
- Dosing is based on the strength (mg) of the tablets, not the brand.
- Some people notice slight differences in how they feel on different brands, but clinically they’re interchangeable. Most switching is fine with doctor’s guidance.
- Always monitor your INR and follow your clinician’s instructions, especially if a brand or formulation changes.

If you’re considering switching brands or have concerns, check with your prescriber or pharmacist first.