Abstract— Zacopride, a substituted benzamide derivative, was compared with diazepam in three models of experimental or provoked anxiety. The drug's action (i) in reducing aversion to a brightly lit environment was assessed in mice using a two compartment black and white test box system, (ii) in disinhibiting a suppressed behaviour was measured in the rat social interaction test under high light/unfamiliar conditions and (iii) in antagonizing a defensive response in the marmoset was assessed using the threat of a human presence. Both zacopride and diazepam enhanced exploratory behaviour and social interaction in the mouse and rat models and antagonized the defensive response in the marmoset, zacopride being 100 times more potent than diazepam. It is concluded that the 5‐HT3 receptor antagonist, zacopride, alters rodent and primate behaviour in a manner consistent with that of an anxiolytic agent.
Journal of Pharmacy and Pharmacology: An International Journal of Pharmaceutical Science – Wiley
Published: Apr 1, 1988
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