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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Pretreatment with d-tubocurarine, vecuronium, and pancuronium attenuates succinylcholine-induced increases in plasma norepinephrine concentrations in humans.

We studied in patients the effect of d-tubocurarine, which has sympathetic ganglion blocking action, on succinylcholine-induced increases in plasma levels of catecholamines, and compared it with the effects of vecuronium and pancuronium, which have little sympathetic ganglion blocking action. Thirty-two patients were divided into five groups: seven were given 3 mL saline; seven received 1 mg/kg succinylcholine; and six, seven, and five patients were given 0.08 mg/kg d-tubocurarine, 0.01 mg/kg vecuronium, and 0.01 mg/kg pancuronium, respectively, all of which were injected 5 min before 1 mg/kg succinylcholine. Succinylcholine alone significantly increased plasma norepinephrine concentrations, systolic blood pressure, and heart rate from 187 +/- 39 pg/mL (mean +/- SEM), 93 +/- 2 mm Hg, and 77 +/- 4 beats/min to 429 +/- 61 pg/mL, 120 +/- 7 mm Hg, and 102 +/- 6 beats/min, respectively, with onset of fasciculations. Pretreatment with d-tubocurarine, vecuronium, and pancuronium significantly and equally attenuated both the fasciculations and the cardiovascular responses to succinylcholine. These results suggest that the sympathetic ganglion blocking action of neuromuscular relaxants when given before succinylcholine is not an important factor in attenuation of succinylcholine-induced increases in plasma levels of catecholamines.[1]


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