“ Polymyxin B (5 μg/ml) did not affect twitch tension alone but decreased the pancuronium ED, from 0.8 μg/ml to 0.32 μg/ml and the d-tubocurarine ED30 from 0.25 μg/ml to 0.15 μg/ml.”
“The authors conclude that polymyxin B potentiates the neuromuscular blockade from pancuronium or d-tubocurarine and that neostigmine further augments this block.”