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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 Category

Opioid analgesic

Chemical Names

4-Piperidinecarboxylic acid, 4((1-oxopropyl)phenylamino)-1-(2-phenyletyl)-, metyl ester

4-Piperidinecarboxylic acid, 4-((1-oxopropyl)phenylamino)-1-(2-phenyletyl)-, metyl ester, 2-hydroxy-1,2,3-propanetricarboxylate (1:1)

Metyl 1-phenetyl-4-(N-phenylpropionamido)-4-piperidylcarboxylat (IUPAC)

Metyl 1-phenetyl-4-(N-phenylpropionamido)isonipecotate (WHO)

Foreign Names

  • Carfentanilum (Latin)
  • Carfentanil (German)
  • Carfentanil (French)
  • Carfentanilo (Spanish)

Generic Names

  • 5-22-13-00537 (IS)
  • BRN 0456976 (IS)
  • R 31833 (IS: Janssen)
  • Carfentanil Citrate (OS: USAN)
  • EINECS 262-748-6 (IS)
  • R 33799 (IS: Janssen)

Brand Name

  • Wildnil (veterinary use)
    Wildlife, United States


IUPACInternational Union of Pure and Applied Chemistry
ISInofficial Synonym
OSOfficial Synonym
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name
WHOWorld 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.