The Effects of Buspirone on Sleep in the Rat
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Buspirone is a novel anxiolytic compound that does not produce the sedation often associated with the use of benzodiazepines. The present study evaluated the effects of this anxiolytic on sleep in rats surgically prepared for long-term recordings. Buspirone, at a dose of 3 mg/kg i.p., produced a significant increase in total wake time (P less than 0.05) compared with drug-free controls. At a dose of 10 mg/kg i.p., rats displayed altered sleep patterns with the most significant effects observed in the first third of recording period. These animals displayed increased wakefulness (P less than 0.001), decreased non-REM sleep (P less than 0.001), and an obliteration of REM sleep (P less than 0.02). These data support the suggestion that the clinically useful anxiolytic buspirone, unlike the benzodiazepines, does not induce sleep.
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