Classification of Commonly Used and New Nondepolarizing Neuromuscular Blockers According to Duration of Action (Time to T1 = 25% of Control) after Administration of 2 × ED95a

Classification of Commonly Used and New Nondepolarizing Neuromuscular Blockers According to Duration of Action (Time to T1 = 25% of Control) after Administration of 2 × ED₉₅^a

	Duration of Action
	Long	Intermediate	Short
	(>50 min)	(20-50 min)	(10-20 min)
Steroidal compounds	Pancuronium	Vecuronium Rocuronium	—
Benzylisoquinolinium compounds	Tubocurarine	Atracurium Cisatracurium	Mivacurium

^a The majority of nondepolarizing neuromuscular blockers are bisquaternary ammonium compounds. Tubocurarine, vecuronium, and rocuronium are monoquaternary compounds.

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Table 12-1