|Molar mass||357.44 g mol−1|
|Melting point||89 °C|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)|
|(what is: / ?)|
Laudanosine or N-methyltetrahydropapaverine is a recognized metabolite of atracurium and cisatracurium. Laudanosine decreases the seizure threshold, and thus it can induce seizures if present at sufficient threshold concentrations; however such concentrations are unlikely to be produced consequent to chemodegradable metabolism of clinically administered doses of cisatracurium or atracurium.
Laudanosine also occurs naturally in minute amounts (0.1%) in opium, from which it was first isolated in 1871. Partial dehydrogenation of laudanosine will lead to papaverine, the alkaloid found in the opium poppy plant (Papaver somniferum).
Laudanosine is a benzyltetrahydroisoquinoline alkaloid. It has been shown to interact with GABA receptors, opioid receptors, and nicotinic acetylcholine receptors, but not benzodiazepinergic or muscarinic receptors which are also involved in epilepsy and other types of seizures.
- Fodale V, Santamaria LB (July 2002). "Laudanosine, an atracurium and cisatracurium metabolite". Eur J Anaesthesiol 19 (7): 466–73. PMID 12113608.
- Burger A (2005) . "The Benzylisoquinoline Alkaloids". In Manske RHF, Holmes HL (eds.). The Alkaloids: Chemistry and Physiology 4. New York: Academic Press. p. 48. ISBN 0-12-469504-3. Retrieved September 18, 2008 through Google Book Search.
- Katz Y, Weizman A, Pick CG, Pasternak GW, Liu L, Fonia O, Gavish M (May 1994). "Interactions between laudanosine, GABA, and opioid subtype receptors: implication for laudanosine seizure activity". Brain Res 646 (2): 235–241. doi:10.1016/0006-8993(94)90084-1. PMID 8069669.
- Exley R, Iturriaga-Vásquez P, Lukas RJ, Sher E, Cassels BK, Bermudez I (Sep 2005). "Evaluation of benzyltetrahydroisoquinolines as ligands for neuronal nicotinic acetylcholine receptors". Br J Pharmacol 146 (1): 15–24. doi:10.1038/sj.bjp.0706307. PMC 1576253. PMID 15980871.
- Katz Y, Gavish M (Jan 1989). "Laudanosine does not displace receptor-specific ligands from the benzodiazepinergic or muscarinic receptors". Anesthesiol 70 (1): 109–111. doi:10.1097/00000542-198901000-00020. PMID 2536252.
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