Journal of Pharmacological Sciences
Online ISSN : 1347-8648
Print ISSN : 1347-8613
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Evaluation of Anxiolytic-like Effects of Some Short-Acting Benzodiazepine Hypnotics in Mice
Tomomi NishinoTomoko TakeuchiKenshi TakechiChiaki Kamei
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2008 Volume 107 Issue 3 Pages 349-354

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Abstract

Anxiolytic-like effects of some short-acting benzodiazepine hypnotics were examined with experimental paradigms of anxiety using an elevated plus-maze in male ICR mice. Diazepam was used as a positive control. The drug at a dose of 1 mg/kg significantly increased the percentage of time spent in the open arms and percentage of the number of open arm entries in the elevated plus-maze. Triazolam, brotizolam, rilmazafone, and lormetazepam also showed an anxiolytic-like effect as indicated by the significant increase in the percentage of time spent in the open arms and percentage of the number of open arm entries. Effects of short-acting benzodiazepine hypnotics used in the study were more potent than those of diazepam. In addition, the doses affecting the elevated plus-maze by benzodiazepine hypnotics were much smaller than those that showed muscle-relaxant activity measured by the rotarod test, indicating that anxiolytic-like effects of benzodiazepine hypnotics had high specificity and selectivity.

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© The Japanese Pharmacological Society 2008
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