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Systematic (IUPAC) name
Clinical data
Legal status
CAS Registry Number 17199-55-2
ATC code None
PubChem CID: 10064061
ChemSpider 8239601
Chemical data
Formula C21H29NO
Molecular mass 311.461 g/mol

Betamethadol (INN), or β-methadol, also known as betametadol, is a synthetic opioid analgesic.[1] It is an isomer of dimepheptanol (methadol), the other being alphamethadol (α-methadol).[2] Betamethadol is composed of two isomers itself, L-β-methadol, and D-β-methadol.[2] Based on structure-activity relationships it can be inferred that both isomers are likely to be active as opioid analgesics, similarly to those of betacetylmethadol (β-acetylmethadol).[3]

Betamethadol is a Schedule I controlled substance in the United States and has a DEA ACSCN of 9609 and an annual aggregate manufacturing quota of 2 grammes.

See also[edit]


  1. ^ F.. Macdonald (1997). Dictionary of Pharmacological Agents. CRC Press. p. 1294. ISBN 978-0-412-46630-4. Retrieved 15 May 2012. 
  2. ^ a b United Nations Office on Drugs and Crime (2006). Dictionnaire Multilingue Des Stupéfiants Et Des Substances Psychotropes Placés Sous Contrôle International. United Nations Publications. p. 103. ISBN 978-92-1-048117-5. Retrieved 15 May 2012. 
  3. ^ Newman JL, Vann RE, May EL, Beardsley PM (October 2002). "Heroin discriminative stimulus effects of methadone, LAAM and other isomers of acetylmethadol in rats". Psychopharmacology 164 (1): 108–14. doi:10.1007/s00213-002-1198-8. PMID 12373424.