Clinical Profile of an Atypical Antipsychotic: Risperidone

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Abstract
Stimulated by Dawkins and colleagues' (1999) and Remington and Kapur's (2000) calls to develop clinical profiles of the new atypical antipsychotic drugs and by Mattes's critiques (1997, 1998), we performed two sets of analyses for risperidone. First, we reanalyzed data from the North American risperidone trial: risperidone was superior to haloperidol to an equal degree in patients with and without the deficit syndrome, in patients with paranoid and nonparanoid schizophrenia, in treatment-resistant and treatment-responsive patients (patients hospitalized for longer and shorter periods), and in patients with or without weight gain. Moreover, risperidone was more effective than haloperidol on symptoms nonresponsive and responsive to haloperidol; its effects on negative symptoms were independent of its effects on extrapyramidal symptoms; and it was effective in treating depression in schizophrenia. Second, we performed a meta-analysis of 18 controlled risperidone trials: risperidone was consistently more effective than conventional antipsychotics in treating positive and negative symptoms.

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