The Full Wiki

More info on Metopon

Metopon: Wikis

Note: Many of our articles have direct quotes from sources you can cite, within the Wikipedia article! This article doesn't yet, but we're working on it! See more info or our list of citable articles.


From Wikipedia, the free encyclopedia

Systematic (IUPAC) name
CAS number 143-52-2
ATC code none
PubChem 5359353
Chemical data
Formula C 18H21NO3  
Mol. mass 299.364 g/mol
Pharmacokinetic data
Bioavailability  ?
Metabolism  ?
Half life  ?
Excretion  ?
Therapeutic considerations
Pregnancy cat.  ?
Legal status
Routes  ?

Metopon (5-methylhydromorphone hydrochloride) is an opiate analogue that is a methylated derivative of hydromorphone which was invented in 1948 as an analgesic.[1]

Metopon is sometimes used in medicine, but although longer acting than hydromorphone, metopon is less potent and its oral bioavailability, while higher than that of morphine, is still fairly low, so generally metopon has few advantages to distinguish it from other, more commonly used opioid analgesics,[2] although it does have a slightly lower tendency to produce nausea and respiratory depression compared to morphine.[3]

CAS number 124-92-5 (Metopon hydrochloride)


  1. ^ Eddy NB. Pharmacology of Metopon and other new analgesic opium derivatives. Annals of the New York Academy of Sciences. 1948; 51(1):51–58.
  2. ^ McLaughlin JP, Nowak D, Sebastian A, Schultz AG, Archer S, Bidlack JM. Metopon and two unique derivatives: affinity and selectivity for the multiple opioid receptors. European Journal of Pharmacology. 1995 Dec 27;294(1):201-6.
  3. ^ Daniel Lednicer. Central Analgetics. (1982), p145. ISBN 0-471-08314-3

Got something to say? Make a comment.
Your name
Your email address