|AHFS/Drugs.com||International Drug Names|
|Excretion||70–90% unchanged in urine 1.3ml/kg/min t1/2 2–4 hours|
|Chemical and physical data|
|Molar mass||666.894 g/mol g·mol−1|
|3D model (JSmol)|
|(what is this?)|
Alcuronium chloride is a neuromuscular blocking (NMB) agent, alternatively referred to as a skeletal muscle relaxant. It is a semi-synthetic substance prepared from C-toxiferine I, a bis-quaternary alkaloid obtained from Strychnos toxifera. C-toxiferine I itself has been tested for its pharmacological action and noted to be a very long acting neuromuscular blocking agent For a formal definition of the durations of actions associated with NMB agents, see page for gantacurium. The replacement of both the N-methyl groups with N-allyl moieties yielded N,N-diallyl-bis-nortoxiferine, now recognized as alcuronium (and at one time marketed as the proprietary agent called Alloferin).
Inclusion of the allylic functions presented an enhanced potential area of biotransformation, and thus alcuronium is observed to have a much shorter duration of neuromuscular blocking action than its parent C-toxiferine I. It also has a more rapid onset of action, and is ~1.5 times as potent as tubocurarine. The pharmacological action of alcuronium is readily reversed by neostigmine, and it produced little histamine release. The major disadvantage of alcuronium is that it elicits a vagolytic effect produced by a selective atropine-like blockade of cardiac muscarinic receptors.