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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

  • Altreno (veterinary use)
    Caledonian Holdings, New Zealand
  • Altrenogest Ceva (veterinary use)
    Ceva Animal Health, United States
  • Altresyn (veterinary use)
    Ceva, Belgium; Ceva, Germany; Ceva, Italy; Ceva, Netherlands; Ceva Animal Health, United Kingdom; Ceva Sante Animale, Ireland; Ceva Santé Animale, Austria; Ceva Santé Animale, France
  • ALTRESYN 0.22% (veterinary use)
    Ceva Animal Health, United States
  • FolliPlan (veterinary use)
    Intervet, United Kingdom; Intervet, Netherlands; MSD Santé Animale Intervet, France
  • Matrix (veterinary use)
    Intervet, United States
  • Ovu-Mate (veterinary use)
    Randlab, New Zealand
  • ReadyServe (veterinary use)
    Ceva Animal Health, Australia
  • Reg-u-late (veterinary use)
    Randlab, Australia
  • Regumate (veterinary use)
    Intervet, Belgium; Intervet, United Kingdom; Intervet, Italy; Intervet, Netherlands; Intervet, Poland; Intervet Ireland, Ireland; MSD, Germany; MSD, New Zealand; MSD Animal, Norway; MSD Animal Health, Australia; MSD Animal Health, Finland; MSD Santé Animale Intervet, France
  • Regu-Mate (veterinary use)
    Intervet, United States
  • Regumate Equine (veterinary use)
    Intervet, Austria; MSD Animal Health, Switzerland
  • Regumate Porcine (veterinary use)
    Intervet SA MSD, South Africa; MSD Animal Health, Switzerland
  • Regumate porcs (veterinary use)
    Intervet, Belgium
  • Suifertil (veterinary use)
    aniMedica, Germany; aniMedica, United Kingdom; aniMedica, Netherlands
  • Synqwell Altrenogest (veterinary use)
    Jurox, Australia
  • Virbagest (veterinary use)
    Virbac, Belgium; Virbac, Germany; Virbac, France; Virbac, United Kingdom; Virbac, Italy; Virbac, Netherlands; Virbac, Poland; Virbac S.A., Ireland


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

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.