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  • Title: Antioxotremorine action of propranolol.
    Author: Ganguly DK.
    Journal: Br J Pharmacol; 1976 Jan; 56(1):21-4. PubMed ID: 1252661.
    Abstract:
    1. The influence of propranolol on the neuromuscular, tremor-producing and muscarinic effects of oxotremorine was examined. 2. In the isolated rat phrenic nerve-diaphragm preparation the neuromuscular blocking effect of oxotremorine was inhibited by propranolol in a dose-dependent manner. 3. Propranolol intensified the paralytic effect of tubocurarine in the rat diaphragm and prevented antagonism of tubocurarine paralysis by tetraethylammonium. 4. Propranolol was devoid of any curare-like effect in the isolated rectus abdominis muscle of the frog. 5. Vasodepressor responses to oxotremorine in rats and spasmogenic responses to oxotremorine in guinea-pig ileum were not antagonized by propranolol. 6. A dose-dependent antagonism of oxotremorine-induced tremor in mice was observed after pretreatment with propranolol and it is suggested that this effect is due to an antagonism of a presynaptic effect of oxotremorine at skeletal neuromuscular junctions.
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