Атракурия безилат

Химические свойства

White to yellowish-white powder, slightly hygroscopic

Использование

A neuromuscular blocking agent

Определение

ChEBI: The bisbenzenesulfonate salt of atracurium.

Биологические функции

Atracurium besylate (Tracrium) is a benzylisoquinolinium compound like d-tubocurarine. Its actions are similar to those of d-tubocurarine, but its duration of action is shorter (45 minutes) because of spontaneous degradation of the molecule (Hofmann elimination). Because of this, atracurium is useful in patients with low or atypical plasma cholinesterase and in patients with renal or hepatic impairment.

Общее описание

Atracurium besylate, 2-(2-carboxyethyl)-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-1-veratrylisoquinolinium benzenesulfonate pentamethyleneester (Tracrium), is a nondepolarizing neuromuscular blockingagent that is approximately 2.5 times more potent thand-tubocurarine. Its duration of action (half-life, 0.33 hours)is much shorter than that of d-tubocurarine.

Клиническое использование

Atracurium Besylate is metabolized rapidly and nonenzymatically to yield laudanosineand a smaller quaternary compound ,which do not have neuromuscular blocking activity. In vitroexperiments show that atracurium besylate breaks down atpH 7.4 and 37°C by a Hoffman elimination reaction.Atracurium besylate undergoes enzymatic decompositionof its ester function to yield an inactive quaternary alcoholand quaternary acid. AChE inhibitors such as neostigmine,edrophonium, and pyridostigmine antagonize paralysis byatracurium besylate.