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Original Articles

No effect of donepezil on neurocognition and social cognition in young persons with stable schizophrenia

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Pages 412-421 | Received 19 Jul 2006, Published online: 09 Aug 2007
 

Introduction

Method

Results

Conclusion

Cognitive dysfunction is common in schizophrenia and linked with psychosocial dysfunction. We examined the possible effect of a 16-week trial of donepezil on cognition in young persons with stable schizophrenia.

Twenty-six outpatients who met criteria for age, duration of illness, clinical stability, and medications were randomly assigned to 16-week treatment with donepezil or placebo using a double blind design. At beginning and conclusion of the trial, participants completed standardised computerised assessment of neurocognition and social cognition. Symptomatology and functioning were assessed using standard rating scales for negative and positive symptoms, depression and mania, and quality of life.

No treatment effects were found on any cognitive functions or clinical symptoms in placebo or donepezil groups.

Similar to other studies using acetylcholinesterase inhibitors in more heterogeneous and symptomatic groups of patients with schizophrenia, donepezil does not appear to enhance cognitive abilities. Persistent cognitive impairment in schizophrenia with pervasive effects on psychosocial functioning and outcome, urge the search for agents that may offer improvement.

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