The head twitch response in mice produced by injection of 5-hydroxytryptophan (100 mg/kg i.p.) and carbidopa (25 mg/kg i.p.) was enhanced by administration of clenbuterol (0.5 mg/kg i.p.), a beta-adrenoceptor agonist. Clenbuterol also enhanced the hyperactivity syndrome in rats produced by quipazine (25 mg/kg i.p.), a 5-hydroxytryptamine (5-HT) agonist. This enhancement was not prevented by depletion of 5-HT in brain with p-chlorophenylalanine or after pretreatment with prazosin. The behaviou...Expand abstract
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Studies on the mechanisms by which clenbuterol, a beta-adrenoceptor agonist, enhances 5-HT-mediated behaviour and increases metabolism of 5-HT in the brain of the rat.
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