Skip to Content


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 receptor antagonist

Chemical Names

(6R,7R,14S)-17-cyclopropylmetyl-7,8-dihydro-7-(1-hydroxy-1-metyletyl)-6-O-metyl-6,14-etano-17-normorphine (BAN)

2-[(-)-(5R,6R,7R,14S)-17-Cyclopropylmetyl-4,5-epoxy-3-hydroxy-6-metoxy-6,14-etanomorphinan-7-yl]propan-2-ol (BAN)

21-Cyclopropyl-6,7,8,14-tetrahydro-7-alpha-(1-hydroxy-1-metyletyl)-6,14-endo-etanooripavine (WHO)

6,14-Etenomorphinan-7-metanol, 17-(cyclopropylmetyl)-4,5-epoxy-18,19-dihydro-3-hydroxy-6-metoxy-α,α-dimetyl-,(5α,7α)-

N-(Cyclopropylmetyl)-4,5-epoxy-7alpha-(2-hydroxy-2-propyl)-6-metoxy-6,14-endo-etano-3-morphinanol (IUPAC)

Foreign Names

  • Diprenorphinum (Latin)
  • Diprenorphin (German)
  • Diprenorphine (French)
  • Diprenorphina (Spanish)

Generic Names

  • Diprenorphine (OS: BAN)
  • DPN (IS)
  • M 5050 (IS: ReckittColma)
  • RX-5050M (IS)
  • Diprenorphine Hydrochloride (OS: BANM)
  • DPN HCl (IS)
  • Revivon (IS)
  • Diprenorphine hydrochloride (PH: BP vet. 2015)

Brand Names

  • Large Animal Diprevon (veterinary use)
    Abbeyvet, United Kingdom
  • Large Animal Revivon (veterinary use)
    Novartis Animal Health, United Kingdom
  • Activon (veterinary use)
    Wildlife Pharma, South Africa
  • M5050 (veterinary use)
    Novartis Animal Health, South Africa
  • M50-50 Diprenorphine (Diprenorphine and Etorphine (veterinary use))
    Wildlife, United States
  • M99 Etorphine (Diprenorphine and Etorphine (veterinary use))
    Wildlife, United States


BANBritish Approved Name
BANMBritish Approved Name (Modified)
IUPACInternational Union of Pure and Applied Chemistry
ISInofficial Synonym
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
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.