Gagiano, Carllo, Read, Stephen, Thorpe, Lilian, Eerdekens, Marielle and Van Hove, Ilse (2005) Short- and long-term efficacy and safety of risperidone in adults with disruptive behavior disorders. Psychopharmacology, 179 (3). pp. 629-636. ISSN 1432-2072

Rationale Function in society can be severely affected by disruptive behaviors in adults.
Objectives To examine the efficacy and safety of risperidone in the treatment of disruptive behavior disorders in intellectually disabled adults.
Methods Intellectually disabled patients with disruptive behavior disorder were randomly assigned to receive risperidone (n=39) in a flexible dosage ranging from 1 to 4 mg/day (mean dosage, 1.45±0.08 mg/day) or placebo (n=38) for 4 weeks of double-blind treatment. Efficacy at endpoint was measured primarily by using the Aberrant Behavior Checklist (ABC); secondary efficacy measures included the Behavior Problems Inventory and Clinical Global Impressions scales. After this 4-week period, patients could enter open-label treatment with risperidone for 48 weeks.
Results Risperidone was well tolerated, and patients treated with risperidone demonstrated significantly greater improvement at endpoint on the ABC than those who received placebo [–27.3 points (52.8% improvement) versus –14.9 points (31.3% improvement); P=0.036] and also improved on Behavior Problems Inventory and Clinical Global Impressions ratings. Over the 48-week, open-label follow-up period, there was a further decrease of 6.3 points (P0.05) on the ABC for patients who initially received risperidone and a decrease of 11.3 points (P0.05) for patients who initially received placebo and were switched to open-label risperidone. These results were achieved with a mean modal dosage of 1.8 mg/day.
Conclusion Risperidone is efficacious and well tolerated in managing disruptive behavior disorders in adults with intellectual disability

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