“However, in concentrations which had little effect on twitch response, diltiazem (20 microM) and nifedipine (50 microM) both increased the neuromuscular blockade produced by tubocurarine , gallamine and pancuronium by about 2-fold.”
“… nifedipine (29-1015 microM) and diltiazem (22-572 microM) reduced, in a dose-dependent manner, the amplitude of indirectly-… Hz with 5-10 V and 0.2 msec pulse duration, and increased the neuromuscular blockade produced by d-tubocurarine (1-254 microM), gallamine (0.… (0.01-7.0 microM).”