Abstract
Neuromuscular blocking properties of tobramycin (Tobracin 60mg), dibekacin (Panmycin 100 mg) and ribostamycin (Vistamycin 1g) were studied in man during anesthesia and surgery by observing the effects of these antibiotics on muscle twitch tension. These antibiotics alone did not show any neuromuscular blocking action in the therapeutic doses. The neuromuscular blocking action of d-tubocurarine chloride was potentiated by the intravenous administration of 1g of ribostamycin. Tobramycin 60mg did not show remarkable effect, but dibekacin 100mg produced a slight potentiating effect on the action of d-tubocurarine. The enhancement of the action of d-tubocurarine was anatagonized by edrophonium and calcium. The action of succinylcholine chloride was not affected by tobramycin or ribostamycin, but it was potentiated transitorily by dibekacin. It is advisable to pay attention to possible respiratory depression when ribostamycin and dibekacin and used in combination with non-depolarizing muscle relaxants and/or anesthetics.
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