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Cognitive functioning and acute sedative effects of risperidone and quetiapine in patients with stable bipolar I
Philip D Harvey1, Howard Hassman, Lian Mao
1Department of Psychiatry, Mt. Sinai School of Medicine, New York, NY, USA.
Objective:
Antipsychotic medications differ in their sedative potential, which can affect cognitive performance. The primary objective of this double-blind study was to compare the effects of treatment initiation with risperidone and quetiapine on cognitive function in subjects with stable bipolar disorder.
Method:
Subjects had a DSM-IV diagnosis of bipolar I disorder in partial or full remission and a Young Mania Rating Scale score
Results:
Thirty subjects were randomly assigned; 28 took all doses of study medication and completed a baseline and at least 1 postbase-line assessment in each treatment. On the NCS, significantly better overall cognitive function was seen after risperidone than after quetiapine at each time point after dosing. Subjects performed significantly better after risperidone than after quetiapine (p < .05) on 9 of the 18 individual cognitive outcome measures and significantly better after quetiapine than after risperidone on 1 measure. Sleeping or the need for sleep during the test days was reported in significantly more patients after receiving quetiapine than risperidone.
Conclusions:
The results indicate that initiation of quetiapine treatment was associated with more immediate adverse cognitive effects and increased somnolence than risperidone treatment.
Clinical Trials Registration:
ClinicalTrials.gov identifier NCT00097032.
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