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  • Title: Effect of experimental cholestasis on neuromuscular blocking drugs in cats.
    Author: Westra P, Houwertjes MC, de Lange AR, Scaf AH, Hindriks FR, Agoston S.
    Journal: Br J Anaesth; 1980 Aug; 52(8):747-57. PubMed ID: 7426252.
    Abstract:
    Pancuronium, Org 6368 and gallamine were compared in control cats and in cats with experimental cholestasis. A decrease in the plasma clearance and a prolongation of neuromuscular blockade with Org 6368 and pancuronium were found in the latter; no significant difference was detected in the biotransformation pattern of Org 6368 and pancuronium compared with controls. Inhibition of hepatic uptake of Org 6368 and pancuronium in extrahepatic cholestasis might explain the significant alterations in the pharmacokinetics of the two steroid neuromuscular blocking drugs. The pharmacokinetics of gallamine were normal during cholestasis. The results suggest that, under pathological conditions involving increased plasma concentrations of bile salts, neuromuscular blocking agents that are cleared from the plasma by the liver may have an impaired hepatic uptake and consequently a prolonged duration of action.
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