Synonyms N-Allylnorcodeine
CAS Number 56195-50-7
PubChem (CID) 5486632
ChemSpider 4588998
Chemical and physical data
Formula C20H23NO3
Molar mass 325.40152 g/mol
3D model (Jmol) Interactive image

Nalodeine, also known more commonly as N-allylnorcodeine, is an opioid antagonist (specifically, an antagonist of the μ-opioid receptor) that was never marketed but is of notability in having been the first opioid antagonist to have been discovered.[1][2] It was first reported in 1915, and this was followed by the clinical introduction of nalorphine (N-allylnormorphine) in 1954, naloxone (N-allyloxymorphone) in 1960, and naltrexone (N-methylcyclopropyloxymorphone) in 1963.[2] Nalmefene (6-desoxy-6-methylene-naltrexone), another structurally related opioid antagonist derivative, was also subsequently introduced, in 1996.[3] In animals, nalodeine both reverses morphine- and heroin-induced respiratory depression and acts as a respiratory stimulant in its own right (i.e., when given alone).[4] Similarly to nalorphine, nalodeine has also been found to act as an agonist of the κ-opioid receptor.[5]

See also


  1. Gavril Pasternak (17 April 2013). The Opiate Receptors. Springer Science & Business Media. pp. 4–. ISBN 978-1-60761-990-1.
  2. 1 2 Anil Aggrawal. APC Essentials of Forensic Medicine and Toxicology. Avichal Publishing Company. pp. 554–. ISBN 978-81-7739-441-2.
  3. Robert M. Julien; Claire D. Advokat; Joseph E. Comaty (8 October 2010). Primer of Drug Action. Worth Publishers. pp. 349–. ISBN 978-1-4292-3343-9.
  4. Bentham Science Publishers (April 1995). Current Medicinal Chemistry. Bentham Science Publishers. pp. 423–.
  5. Cho N, Hirobe M, Takayanagi I (1985). "Effects of epoxidation on the actions of normorphine, norcodeine, N-allylnormorphine(nalorphine) and N-allylnorcodeine on the electrically stimulated guinea pig ileum" (PDF). Chem. Pharm. Bull. 33 (4): 1681–6. doi:10.1248/cpb.33.1681. PMID 4042244.

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