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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


Chemical Names

17α-Allyl-17-hydroxyesta-4,9,11-trien-3-one (WHO)

Estra-4,9,11-trien-3-one, 17β-hydroxy-17-(2-propenyl)- (USAN)

Foreign Names

  • Altrenogestum (Latin)
  • Altrenogest (German)
  • Altrénogest (French)
  • Altrenogest (Spanish)

Generic Names

  • Altrenogest (OS: BAN, USAN)
  • Altrénogest (OS: DCF)
  • A 35957 (IS)
  • A 41300 (IS)
  • RH 2267 (IS)
  • RU 2267 (IS: RousselUclaf)

Brand Names

  • Altresyn (veterinary use)
    Ceva, Austria; Ceva, Germany; Ceva, France; Ceva Animal Health, United Kingdom
  • FolliPlan (veterinary use)
    Intervet, France; Intervet, United Kingdom; Veterinaria, Switzerland
  • Matrix (veterinary use)
    Intervet, United States
  • ReadyServe (veterinary use)
    Nature Vet, Australia
  • Reg U Late (veterinary use)
    Caledonian Holdings, New Zealand
  • Regu Mate (veterinary use)
    Intervet, United States
  • Reg-u-late (veterinary use)
    Randlab, Australia
  • Regumate (veterinary use)
    Intervet, Austria; Intervet, Belgium; Intervet, Germany; Intervet, Finland; Intervet, France; Intervet, United Kingdom; Intervet, Ireland; Intervet, Italy; Intervet, Netherlands; Intervet, Norway; Intervet, Poland; Intervet, South Africa; Intervet / Schering-Plough Animal Health, New Zealand; Intervet International B.V., Luxembourg; Intervet/Schering-Plough Animal Health, Australia; Janssen Animal Health, Belgium; Janssen Animal Health, Germany; Janssen Santé Animale, France; Veterinaria, Switzerland
  • Synqwell Altrenogest (veterinary use)
    Jurox, Australia
  • Virbagest (veterinary use)
    Virbac, France; Virbac, United Kingdom; Virbac, Poland

International Drug Name Search


BANBritish Approved Name
DCFDénomination Commune Française
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.