Aripiprazole versus other atypical antipsychotics for schizophrenia
ABSTRACT In many countries of the industrialised world second generation (atypical) antipsychotics have become first line drug treatments for people with schizophrenia. The question as to whether, and if so how much, the effects of the various second generation antipsychotics differ is a matter of debate. In this review we examine how the efficacy and tolerability of aripiprazole differs from that of other second generation antipsychotics.
To evaluate the effects of aripiprazole compared with other atypical antipsychotics for people with schizophrenia and schizophrenia-like psychoses.
We searched the Cochrane Schizophrenia Group Trials Register (March 2007) which is based on regular searches of BIOSIS, CENTRAL, CINAHL, EMBASE, MEDLINE and PsycINFO.
We included all randomised trials comparing oral aripiprazole with oral forms of amisulpride, clozapine, olanzapine, quetiapine, risperidone, sertindole, ziprasidone or zotepine in people with schizophrenia or schizophrenia-like psychoses.
We extracted data independently. For dichotomous data we calculated relative risks (RR) and their 95% confidence intervals (CI) on an intention-to-treat basis based on a random-effects model. We calculated numbers needed to treat/harm (NNT/NNH) where appropriate. For continuous data, we calculated weighted mean differences (MD) again based on a random-effects model.
The review currently includes four trials with 1404 participants on two out of eight possible comparisons - aripiprazole versus olanzapine and aripiprazole versus risperidone. The overall number of participants leaving the studies early was considerable (38.5%), limiting the validity of the findings, but with no significant differences between groups. Aripiprazole was less efficacious than olanzapine in terms of the general mental state (PANSS total score: n=794, 2 RCTs, MD 4.96 CI 1.85 to 8.06), but it was associated with fewer side-effects such as cholesterol increase, weight gain, sedation and prolactin associated side-effects. Compared with risperidone there was no difference in efficacy (PANSS total score: n=372, 2 RCTs, MD 1.50 CI -2.96 to 5.96). Dystonia, QTc abnormalities, prolactin and cholesterol increase were less frequent in the aripiprazole group, while tremor was more frequent in the aripiprazole group compared with those allocated risperidone.
Aripiprazole may be somewhat less effective than olanzapine, but more tolerable in terms of metabolic effects and sedation. There is no evidence for a difference in efficacy compared to risperidone, but for better tolerability in terms of dystonias, cholesterol prolactin increase and QTc prolongation. Randomised evidence comparing aripiprazole with other second generation antipsychotic drugs is currently not available.
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ABSTRACT: Resumen El cambio de antipsicóticos es un hecho frecuente en la práctica clínica y está sujeto a potenciales complicaciones clínicamente relevantes. Un grupo de expertos seleccionados por la Sociedad Española de Psiquiatría y la Sociedad Española de Psiquiatría Biológica ha revisado y discutido las pruebas provenientes de los ensayos clínicos y otros artículos relevantes para llegar a unas recomendaciones de consenso sobre el cambio de antipsicóticos. En este artículo se revisa toda la información que ha dado lugar a esas recomendaciones y que incluye: indica-ciones y contraindicaciones del cambio de antipsicóticos, aspectos farmacológicos, estrategias de cambio, el cambio por motivos de eficacia, el cambio por motivos de tolerabilidad (inclu-yendo los síntomas extrapiramidales y la discinesia tardía, el aumento de peso, los trastornos metabólicos, la hiperprolactinemia, la disfunción sexual, la sedación persistente y la prolon-gación del QT), el cambio por problemas de cumplimiento y el cambio de antipsicóticos en el trastorno bipolar. © 2011 SEP y SEPB. Publicado por Elsevier España, S.L. Todos los derechos reservados. Los miembros del Grupo RECAP aparecen al final del artículo. * Autor para correspondencia.Revista de Psiquiatría Biológica y Salud Mental 07/2011; DOI:10.1016/j.rpsm.2011.07.003 · 0.31 Impact Factor
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