Effekten af risperidon til kortvarig behandling af skizofreni blev bestemt i fire forsøg af 4- 8 ugers varighed med over 2. 500 patienter, som opfyldte DSM- IV- kriterierne for skizofreni.
The efficacy of risperidone in the short-term treatment of schizophrenia was established in four studies, 4- to 8-weeks in duration, which enrolled over 2500 patients who met DSM-IV criteria for schizophrenia.