A Study of the Effectiveness and Safety of Two Doses of Risperidone in the Treatment of Children and Adolescents With Autistic Disorder

Oral solution qd or bid for 6 weeks

Risperidone oral solution 1.25 mg (if \<45 kg) or 1.75 mg (if \>=45 kg) qd or bid for 6 weeks

Risperidone oral solution 0.125 mg (if \<45 kg) or 0.175 mg (if \>=45 kg) qd or bid for 6 weeks