Antianxiety profile of ondansetron,
a selective 5-HT3 antagonist,
in a novel animal model
by
Roychoudhury M, Kulkarni SK
Pharmacology Division,
Panjab University,
Chandigarh, India.
Methods Find Exp Clin Pharmacol 1997 Mar; 19(2):107-11

ABSTRACT

The profile of action of ondansetron was assessed in a novel animal model of anxiety. The mirrored chamber is a nonpunishing quantitative model of anxiety which measures approach-conflict behavior. Ondansetron in all the doses tested (0.01, 0.1 and 1 mg/kg i.p.) showed significant anxiolytic action as compared to naive mice, but it was less potent as compared to a well-known anxiolytic, diazepam (1 mg/kg). These results suggest that ondansetron has anxiolytic efficacy in nonconflict paradigms of anxiety, a response not mediated by the conventional neurotransmitter receptors. GABA-benzodiazepine as flumazenil (4 mg/kg), a benzodiazepine receptor antagonist, failed to reverse the behavioral parameters evoked by ondansetron.

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