or the upregulation of 5-HT1A receptors in the brains of subjects with schizophrenia. The augmented tonic stimulation of postsynaptic 5-HT1A receptors, as a result of the increased number of these receptors, may be a reason for impaired cognitive function in patients with schizophrenia. Activation of presynaptic 5-HT1A autoreceptors by low-dose 5-HT1A partial agonists, by means of inhibition of 5-HT neuronal activity, would produce a greater degree of decrease in the stimulation of postsynaptic 5-HT1A receptors in patients with schizophrenia compared with psychiatrically normal subjects. Thus, low-dose 5-HT1A agonists improve memory function in patients with schizophrenia but not in normal subjects. 5-HT: 5-hydroxytryptamine. Redrawn from.[92]
Other investigators have reported that buspirone may be efficacious in the treatment of tardive dyskinesia[95] but not acute akathisia.[96] Our preliminary analysis suggests buspirone 30 mg/day added to treatment with atypical antipsychotic drugs, such as olanzapine and risperidone, produced limited change in these neurologic signs in a randomly assigned double-blind placebo-controlled study [Sumiyoshi T et al., Unpublished Data].
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Expert Rev Clin Pharmacol. 2008;1(6):791-802. © 2008 Expert Reviews Ltd.
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