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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

Sedative agent

Neuroleptic agent

Agent for premedication

Chemical Name

4'-fluoro-4-[4-(2-pyridyl)-1-piperazinyl]butyrophenone (WHO)

Foreign Names

  • Azaperonum (Latin)
  • Azaperon (German)
  • Azapérone (French)
  • Azaperona (Spanish)

Generic Names

  • Azaperone (OS: BAN, USAN)
  • Azapérone (OS: DCF)
  • 5-23-03-00041 (IS: Beilstein)
  • BRN 0565491 (IS)
  • R 1929 (IS)
  • UNII-19BV78AK7W (IS)
  • Azaperon für Tiere (PH: Ph. Eur. 8)
  • Azaperone (PH: BP vet. 2015, USP 37)
  • Azaperone for veterinary use (PH: Ph. Eur. 8)
  • Azapérone pour usage vétérinaire (PH: Ph. Eur. 8)
  • Azaperonum ad usum veterinarium (PH: Ph. Eur. 8)

Brand Names

  • Stresnil (veterinary use)
    Ausrichter, New Zealand; Bayer Animal Health, South Africa; Elanco Animal Health, Australia; Elanco Animal Health, Germany; Elanco Animal Health, Ireland; Eli Lilly Benelux, Belgium; Janssen-Cilag, Austria; Janssen-Cilag, Poland; Janssen-Cilag Ltd, United Kingdom; Lilly, Netherlands; Lilly Vet, France; Lilly-Elanco, Italy; Provet, Switzerland

International Drug Name Search


BANBritish Approved Name
DCFDénomination Commune Française
ISInofficial Synonym
OSOfficial Synonym
PHPharmacopoeia Name
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.