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Efficacy and safety of brand-risperidone versus similar-risperidone in elderly patients with neuropsychiatric disorders: A retrospective study

Eficácia e segurança da risperidona-referência versus risperidona-similar em pacientes idosos com transtornos neuropsiquiátricos: um estudo retrospectivo

Abstract

To compare the efficacy and tolerability of brand-risperidone against similar-risperidone in elderly outpatients. Method: The medical files of 16 elderly outpatients from the IPq-HCFMUSP treated with two formulations of risperidone (brand and similar) between July/1999 and February/2000 were reviewed. Two independent raters, using the Clinical Global Impression scale, evaluated the efficacy of the treatment with risperidone and the frequency of adverse effects. Results: Comparing October/1999 to November/1999, Rater 1 observed a trend (p=0.059) and Rater 2 found a statistically significant difference, in favor of the brand-risperidone group (p=0.014). Comparing October/1999 to February/2000, Rater 1 observed no statistically significant difference (p=0.190), but the Rater 2 found a statistically significant difference in favor of the brand-risperidone group (p=0.029). Comparing November/1999 to February/2000, both raters found no statistically significant differences between both risperidone formulations. Regarding adverse effects, a statistically significant difference (p=0.046) was found in favor of the patients treated with brand-risperidone. Conclusions: The risperidone-reference, compared to similar-risperidone, showed a trend toward greater efficacy and tolerability.

Key words:
risperidone; elderly; treatment; efficacy; side effects

Resumo

Comparar a eficácia e a tolerabilidade da risperidona-referência versus a risperidona-similar em pacientes idosos. Métodos: Os prontuários de 16 pacientes do IPq-HCFMUSP tratados com duas formulações de risperidona (referência e similar) entre julho/1999 e fevereiro/2000 foram revisados. Dois examinadores independentes, utilizando a escala de Impressão Clínica Global, avaliaram a eficácia do tratamento com risperidona e a freqüência de efeitos colaterais. Resultados: Comparando outubro/1999 e novembro/1999, o avaliador 1 observou uma tendência (p=0,059) e o examinador 2 encontrou uma diferença estatisticamente significativa a favor da risperidona-referência (p=0,014). Comparando outubro/99 com fevereiro/2000, o avaliador 1 não encontrou diferença estatisticamente significativa (p=0,190), mas o examinador 2 encontrou uma diferença estatisticamente significativa a favor da risperidona-referência (p=0,029). Entre novembro/1999 e fevereiro/2000, ambos examinadores não encontraram diferença significativas entre as formulações. Quanto aos efeitos colaterais, houve diferença significativa (p=0,046) a favor do grupo risperidona-referência. Conclusões: A risperidona-referência, quando comparada à risperidona-similar, mostrou tendência a maior eficácia e tolerabilidade.

Palavras-chave:
risperidona; idosos; tratamento; eficácia; efeitos colaterais

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Publication Dates

  • Publication in this collection
    Jan-Mar 2010

History

  • Received
    22 Oct 2009
  • Accepted
    08 Jan 2010
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