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In some countries, this medicine may only be approved for veterinary use.

In the US, Warfarin (warfarin systemic) is a member of the drug class coumarins and indandiones and is used to treat Antiphospholipid Syndrome, Chronic Central Venous Catheterization, Deep Vein Thrombosis Prophylaxis after Hip Replacement Surgery, Deep Vein Thrombosis Prophylaxis after Knee Replacement Surgery, Deep Vein Thrombosis - First Event, Deep Vein Thrombosis - Recurrent Event, Heart Attack, Heart Failure, Prevention of Thromboembolism in Atrial Fibrillation, Prosthetic Heart Valves - Thrombosis Prophylaxis, Prosthetic Heart Valves - Mechanical Valves - Thrombosis Prophylaxis, Prosthetic Heart Valves - Tissue Valves - Thrombosis Prophylaxis, Protein S Deficiency, Pulmonary Embolism - First Event, Pulmonary Embolism - Recurrent Event and Thromboembolic Stroke Prophylaxis.

US matches:

UK matches:



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Category

Anticoagulant agent: Vitamin K antagonist

Chemical Name

2H-1-Benzopyran-2-one, 4-hydroxy-3-(3-oxo-1-phenylbutyl)-

Foreign Names

  • Warfarinum (Latin)
  • Warfarin (German)
  • Warfarine (French)
  • Warfarina (Spanish)

Generic Names

  • Warfarin (OS: DCIT, BAN)
  • Warfarine (OS: DCF)
  • Warfarin Sodium Clathrate (OS: BANM)
  • Warfarin sodium clathrate (PH: Ph. Eur. 8)
  • Warfarin Sodium Clathrate (PH: BP 2015)
  • Warfarine sodique clahrate (PH: Ph. Eur. 8)
  • Warfarin-Natrium-Clathrat (PH: Ph. Eur. 8)
  • Warfarinum natricum clathratum (PH: Ph. Eur. 8)
  • Warfarin Potassium (OS: JAN)
  • Antrombin K (IS)
  • Athrombin-K (IS)
  • Warfarin K (IS)
  • Warfarin Potassium (PH: JP XVI, USP XXI)
  • Warfarin Sodium (OS: BANM)
  • Warfarin Sodium (PH: BP 2015, Ph. Int. 4, USP 37)
  • Warfarin sodium (PH: Ph. Eur. 8)
  • Warfarine sodique (PH: Ph. Eur. 8)
  • Warfarin-Natrium (PH: Ph. Eur. 8)
  • Warfarinum natricum (PH: Ph. Eur. 8, Ph. Int. 4)

Brand Names

International Drug Name Search


BANBritish Approved Name
BANMBritish Approved Name (Modified)
DCFDénomination Commune Française
DCITDenominazione Comune Italiana
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)

Click for further information on drug naming conventions and International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.