Abstract
We have shown that coadministration of sulpiride and fluvoxamine preferentially increases the release of dopamine in the prefrontal cortex. To study the possible role of the cortical cholinergic system in this effect, we combined several other antipsychotic drugs with fluvoxamine and examined the effects on acetylcholine release in rat prefrontal cortex. Risperidone and clozapine significantly increased the release of acetylcholine but sulpiride did not, and fluvoxamine did not enhance the effects of the antipsychotics. These results further support the previous suggestion that the cortical dopamine system plays an important role in the effects of antipsychotic drugs administered in combination with fluvoxamine.
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