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INTERACTION OF MIDAZOLAM WITH TWO NON-DEPOLARIZING NEUROMUSCULAR BLOCKING DRUGS IN THE RAT IN VIVO SCIATIC NERVE-TIBIALIS ANTERIOR MUSCLE PREPARATION

1985; Elsevier BV; Volume: 57; Issue: 11 Linguagem: Inglês

10.1093/bja/57.11.1089

1471-6771

J. J. Driessen, T. B. Vree, J. van Egmond, L.H.D.J. Booij, J. F. Crul,

Neuroscience and Neuropharmacology Research

Studies of the possible interactions between the water-soluble benzodiazepine, midazolam, and two non-depolarizing neuromuscular blocking drugs, vecuronium and tubocurarine, were performed in the rat in vivo sciatic nerve-tibialis anterior muscle preparation. Midazolam 0.5 and 5 mg kg-1 caused 17% and 34% depression of the twitch height, respectively, once a steady-state blockade of the twitch height had been induced by vecuronium. The potentiation of the tubocurarine steady state blockade by midazolam 5 mg kg-1 was quantitatively equal to that of vecuronium, but was slower in onset. The buffer solvent of midazolam 5 mg kg-1 did not change the steady-state blockade of vecuronium. Midazolam 5 mg kg-1 caused a shift to the left of the cumulative dose-response curves of vecuronium.