Fig. 7.

The interaction indices among rocuronium, gentamicin, clindamycin on single twitch and tetanic fade. They are lower than 0.9 for 0.1 mM gentamicin with 0.1, 0.25, and 0.5 mM clindamycin in single twitch; the interaction is synergistic. At other concentration combinations, the indices are lower than 1.1; the interaction is synergistic or additive (A). The interaction indices are lower than 0.9, except for the combination of 0.01 mM gentamicin with 0.25 mM clindamycin in tetanic fade; the interaction is synergistic (B). The values are reported as the mean and the SD. GM and CM represents gentamicin and clindamycin, respectively.