Figure 2. Onset of neuromuscular block after 2 mg/kg succinylcholine ([round bullet, filled]) and after 1.2 ([square, open]) or 0.8 mg/kg ([square bullet, filled]) rocuronium. Onset of 90% block after 1.2 mg/kg rocuronium (33 +/- 5 s) was not significantly different from that after succinylcholine (30 +/- 7 s). *P < 0.05 compared with succinylcholine and with 1.2 mg/kg rocuronium.