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

Generic Names

  • Warfarin (OS: DCIT, BAN)
  • Warfarine (OS: DCF)
  • Warfarin Sodium Clathrate (OS: BANM)
  • Warfarin sodium clathrate (PH: Ph. Eur. 7)
  • Warfarin Sodium Clathrate (PH: BP 2011)
  • Warfarine sodique clahrate (PH: Ph. Eur. 7)
  • Warfarin-Natrium-Clathrat (PH: Ph. Eur. 7)
  • Warfarinum natricum clathratum (PH: Ph. Eur. 7)
  • Antrombin K (IS)
  • Athrombin-K (IS)
  • Warfarin K (IS)
  • Warfarin Potassium (PH: JP XV, USP XXI)
  • Warfarin Sodium (OS: BANM)
  • Warfarin Sodium (PH: BP 2011, Ph. Int. 4, USP 34)
  • Warfarin sodium (PH: Ph. Eur. 7)
  • Warfarine sodique (PH: Ph. Eur. 7)
  • Warfarin-Natrium (PH: Ph. Eur. 7)
  • Warfarinum natricum (PH: Ph. Eur. 7, Ph. Int. 4)

Brand Names

  • Fargem
    M.J. Biopharm, Thailand; MJ Biopharm, Myanmar
  • Farin
    Galenika, Bosnia & Herzegowina
  • Kill-Rat (veterinary use)
    Vigor Pharmachemie, Germany
  • Marevan
    Goldshield, Malta; Orion, Slovenia
  • Varfarins-Grindeks
    Grindeks, Lithuania
  • Warf
    Cipla, India
  • Warfareks
    Grindeks, Georgia
  • Warfarin 3-SL
    Slovakofarma, Lithuania
  • Warfarin Grindeks
    Grindeks, Lithuania
  • Warfarin
    Bristol, Malta; Crescent, Malta; Taro, Malta
  • Warfarina
    Carrion, Peru; Lusa, Peru
  • Warfarin-Grindeks
    Grindeks, Latvia
  • Lawarin
    Pliva-Lachema, Slovakia; Pro.Med.CS, Czech Republic
  • Marfarin
    Generics, Hungary
  • Apo-Warfarin
    Apotex, Hong Kong
  • Arefarin
    Fuji Yakuhin, Japan
  • Warfarin Eisai
    Eisai, Indonesia
  • Warfarin
    Eisai, Japan
  • Warfarin K
    Nisshin Seiyaku - Yamagata, Japan
  • Warlin
    Taiyo Pharmaceutical, Japan
  • Aldocumar
    Aldo Union, Spain
  • Anasmol
    Roemmers, Venezuela
  • Anticoag
    Donvalley, Pakistan
  • Apo-Warfarin
    Apotex, Canada; Apotex, Malaysia
  • Befarin
    Berlin, Thailand
  • Cipla-Warfarin
    Cipla Medpro, South Africa
  • Circuvit
    Ariston, Argentina
  • Cofarin
    Gentle, Taiwan
  • Coumadin
    Bristol-Myers Squibb, Argentina; Bristol-Myers Squibb, Canada; Bristol-Myers Squibb, Germany; Bristol-Myers Squibb, Italy; Bristol-Myers Squibb, Taiwan; Bristol-Myers Squibb, United States; Bristol-Myers Squibb, Venezuela; Du Pont, Oman; Eczacibasi, Turkey; Healthcare Logistics, New Zealand; Je Il, South Korea; Merck, Chile; Merck, Ecuador; Merck, Peru; Sigma, Australia; Taro, Israel; Taro, Philippines
  • Coumadine
    Bristol-Myers Squibb, France
  • Cumar
    Medifarm, Venezuela
  • Farin
    Galenika, Serbia
  • Gen-Warfarin
    Genpharm ULC, Canada
  • Jantoven
    USL Pharma, United States
  • Kovar
    Actavis, Iceland
  • Lennon-Warfarin
    Aspen Pharmacare, South Africa; Lennon, Taiwan
  • Maforan
    Sriprasit Dispensary, Thailand
  • Marevan
    Farmoquimica, Brazil; Fawns & McAllan, Australia; GlaxoSmithKline, New Zealand; GlaxoSmithKline, Singapore; Goldshield, United Kingdom; IFET, Greece; Nycomed, Denmark; Nycomed, Norway; Orion, China; Orion, Estonia; Orion, Finland; Orion, Russian Federation; Therabel, Belgium
  • Marevan Forte
    Orion, Estonia
  • Marivarin
    Krka, Bosnia & Herzegowina; Krka, Slovenia
  • Martefarin
    Medis Adria, Croatia (Hrvatska)
  • Orfarin
    Orion, Lithuania; Orion, Latvia; Orion, Malaysia; Orion, Singapore; Orion, Thailand; Orion, Taiwan; Rigel, Malaysia
  • Panwarfin
    Abbott, Greece
  • Simarc
    Fahrenheit, Indonesia
  • Taro-Warfarin
    Taro, Canada
  • Tufam
    Unison, Thailand
  • Waran
    Nycomed, Sweden
  • Warfant
    Antigen, Ireland
  • Warfarin Nycomed
    Nycomed, Georgia; Nycomed, Sweden
  • Warfarin Orion Pharma
    Orion, Finland
  • Warfarin Orion
    Orion, Czech Republic; Orion, Georgia; Orion, Hungary; Orion Pharma, Sweden
  • Warfarin Sine Pharm
    Sine Pharm, China
  • Warfarin Sodium InvaGen
    InvaGen, United States
  • Warfarin Sodium
    Mylan, United States; Pliva, United States; Rosemont, United Kingdom; Sandoz, United States; Taro, United States; Teva, United States; Zydus, United States
  • Warfarin
    Norton, Malta; Nycomed, Russian Federation; Sandoz, United Kingdom; Teva, Ireland
  • Warfarin-Teva
    Teva, Hong Kong
  • Warfin
    Orion, Poland
  • Warin
    Incepta, Bangladesh
  • Zyfarin
    Zydus Cadila, Philippines

International Drug Name Search


BANBritish Approved Name
BANMBritish Approved Name (Modified)
DCFDénomination Commune Française
DCITDenominazione Comune Italiana
ISInofficial Synonym
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 Drugs.com 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.