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Cognitive Efficacy of Quetiapine in Early-Onset First-Episode Psychosis: A 12-Week Open Label Trial

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Abstract

Twenty-three adolescents with psychotic disorders, aged from 13 to 18 years, participated in a 12-week open label trial (17 adolescents completed the study) in order to examine the impact of quetiapine on clinical status and cognitive functions (encompassing processing speed, attention, short-term memory, long-term memory and executive function). An improvement in Clinical Global Impression and Positive and Negative Symptom Scale (P’s ≤ 0.001) was observed. In addition, after controlling for amelioration of symptoms, a significant improvement was observed on one executive function (P = 0.044; Trail Making Part B). The remaining cognitive abilities showed stability. In addition, we observed an interaction between quetiapine doses (>300 mg/day or <300 mg/day) and time, where lower doses showed more improvement in verbal short-term memory (P = 0.048), inhibition abilities (P = 0.038) and positive symptoms (P = 0.020). The neuropsychological functioning of adolescents with psychotic disorders remained mainly stable after 12 weeks of treatment with quetiapine. However, lower doses seemed to have a better impact on two components of cognition (inhibition abilities and verbal short-term memory) and on positive symptoms.

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Acknowledgment

This study was financially supported by AstraZeneca, Switzerland, by an unrestricted grant.

Conflict of interest

PB and UP have received honoraries or sponsorships from almost all pharmaceutical companies in Switzerland selling psychotropic drugs. In particular, they received honoraries from the manufacturer of quetiapine (AstraZeneca). Others authors reported no conflicts of interest.

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Correspondence to Sébastien Urben.

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Urben, S., Baumann, P., Barcellona, S. et al. Cognitive Efficacy of Quetiapine in Early-Onset First-Episode Psychosis: A 12-Week Open Label Trial. Psychiatr Q 83, 311–324 (2012). https://doi.org/10.1007/s11126-011-9201-3

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