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



CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories

Non-steroidal anti-inflammatory drug, NSAID

Antirheumatic agent

Cyclo-oxygenase 2 (COX-2) inhibitor

Chemical Name

{5-etyl-2-[(2,3,5,6-tetrafluorophenyl)amino]phenyl}acetic acid (WHO)

Foreign Names

  • Robenacoxibum (Latin)
  • Robenacoxib (German)
  • Robénacoxib (French)
  • Robenacoxib (Spanish)

Generic Name

  • UNII-Z588009C7C (IS)

Brand Names

  • Onisor (veterinary use)
    Novartis, Germany
  • Onisor Chats (veterinary use)
    Novartis Animal Health, Belgium
  • Onisor Chiens (veterinary use)
    Novartis Animal Health, Belgium
  • Onisor chiens, chats (veterinary use)
    Novartis Animal Health, Belgium
  • Onsior (veterinary use)
    Novartis, Germany; Novartis Animal Health, United Kingdom; Novartis Animal Health, Italy; Novartis Animal Health, Netherlands; Novartis Animal Health, Norway; Novartis Animal Health, Poland; Novartis Animal Health, United States; Novartis Animal Health UK, Austria; Novartis Healthcare Animal Health, Sweden; Novartis Santé Animale, France; Novartis Tiergesundheit, Switzerland; Elanco Eläinlääkkeet, Finland; Novartis Animal Health Australasia, Australia
  • Onsior for Cats (veterinary use)
    Novartis AH, South Africa
  • Onsior for Dogs (veterinary use)
    Novartis AH, South Africa


ISInofficial Synonym
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
WHOWorld Health Organization

Further information on drug naming conventions: 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.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.