Effects of risperidone on conduct and disruptive behavior disorders in children with subaverage IQs. Double-blind, placebo-controlled study of risperidone for the treatment of disruptive behaviors in children with subaverage intelligence. Risperidone in children with autism and serious behavioral problems. A randomized controlled trial of risperidone in the treatment of aggression in hospitalized adolescents with subaverage cognitive abilities. A randomized, double-blind, placebo-controlled study of risperidone maintenance treatment in children and adolescents with disruptive behavior disorders. Risperidone in the treatment of behavioral disturbances in children and adolescents with borderline intellectual functioning: a double-blind, placebo-controlled pilot trial. A double-blind, placebo-controlled study of valproate for aggression in youth with pervasive developmental disorders. Risperidone augmentation for treatment-resistant aggression in attention-deficit/hyperactivity disorder: a placebo-controlled pilot study. A double-blind pilot study of risperidone in the treatment of conduct disorder.
To determine whether risperidone is effective in reducing symptoms of disruptive behaviors (such as aggression, impulsivity, defiance of authority figures, and property destruction) associated with conduct disorder, oppositional defiant disorder, and disruptive behavior disorder-not otherwise specified in children with subaverage IQs.
                The trial consisted of a 1-week, single-blind, placebo run-in period and was followed by a 6-week, double-blind, placebo-controlled period. One hundred ten children (aged 5-12 years inclusive) with an IQ of 36-84 with a disruptive behavior disorder and a score of at least 24 on the Conduct Problem subscale of the Nisonger Child Behavior Rating Form (NCBRF) were enrolled. Eighty percent of subjects had comorbid attention-deficit/hyperactivity disorder (ADHD). Risperidone doses ranged from 0.02 to 0.06 mg/kg per day. Subjects were rated on the NCBRF, Aberrant Behavior Checklist, Behavior Problems Inventory, Clinical Global Impressions (CGI), modified California Verbal Learning Test (CVLT), and a continuous performance task (CPT).
                The intention-to-treat analysis of risperidone-treated subjects showed a significant (p < .001) reduction in mean scores (from 33.4 at baseline to 17.6 at end point; 47.3% reduction) versus placebo-treated subjects (mean baseline of 32.6 to 25.8 at end point; 20.9% reduction) on the Conduct Problem subscale of the NCBRF. Between-group differences in favor of risperidone were seen as early as week 1 and were significant at all post-baseline visits. Other subscales showed significant improvement with risperidone compared with placebo. CGI scale ratings of improvement showed highly significant gains for risperidone over placebo. A subanalysis demonstrated that the effect of risperidone was unaffected by diagnosis, presence/absence of ADHD, psychostimulant use, IQ status, and somnolence. Risperidone produced no changes on the cognitive variables (CPT/modified CVLT). The most common side effects included somnolence, headache, appetite increase, and dyspepsia. Side effects related to extrapyramidal symptoms were reported in 7 (13.2%) and 3 (5.3%) of the subjects in the risperidone and placebo groups, respectively (p = .245).
                Risperidone appears to be an adequately tolerated and effective treatment in children with subaverage IQs and severe disruptive behaviors such as aggression and destructive behavior. The short-term efficacy and safety of risperidone in the treatment of disruptive behaviors was examined in a well-characterized cohort of children with subaverage intelligence.
                In this 6-week, multicenter, double-blind, parallel-group study of 118 children (aged 5-12 years) with severely disruptive behaviors and subaverage intelligence (IQ between 36 and 84, inclusive), the subjects received 0.02-0.06 mg/kg per day of risperidone oral solution or placebo. The a priori primary efficacy measure was the change in score from baseline to endpoint on the conduct problem subscale of the Nisonger Child Behavior Rating Form.
                The risperidone group showed significantly greater improvement than did the placebo group on the conduct problem subscale of the Nisonger Child Behavior Rating Form from week 1 through endpoint (change in score of -15.2 and -6.2, respectively). Risperidone was also associated with significantly greater improvement than placebo on all other Nisonger Child Behavior Rating Form subscales at endpoint, as well as on the Aberrant Behavior Checklist subscales for irritability, lethargy/social withdrawal, and hyperactivity; the Behavior Problems Inventory aggressive/destructive behavior subscale; a visual analogue scale of the most troublesome symptom; and the Clinical Global Impression change score. The most common adverse effects reported during risperidone treatment were headache and somnolence. The extrapyramidal symptom profile of risperidone was comparable to that of placebo. Mean weight increases of 2.2 kg. and 0.9 kg occurred in the risperidone and placebo groups, respectively.
                Risperidone was effective and well tolerated for the treatment of severely disruptive behaviors in children with subaverage IQ. Atypical antipsychotic agents, which block postsynaptic dopamine and serotonin receptors, have advantages over traditional antipsychotic medications in the treatment of adults with schizophrenia and may be beneficial in children with autistic disorder who have serious behavioral disturbances. However, data on the safety and efficacy of atypical antipsychotic agents in children are limited.
                We conducted a multisite, randomized, double-blind trial of risperidone as compared with placebo for the treatment of autistic disorder accompanied by severe tantrums, aggression, or self-injurious behavior in children 5 to 17 years old. The primary outcome measures were the score on the Irritability subscale of the Aberrant Behavior Checklist and the rating on the Clinical Global Impressions - Improvement (CGI-I) scale at eight weeks.
                A total of 101 children (82 boys and 19 girls; mean [+/-SD] age, 8.8+/-2.7 years) were randomly assigned to receive risperidone (49 children) or placebo (52). Treatment with risperidone for eight weeks (dose range, 0.5 to 3.5 mg per day) resulted in a 56.9 percent reduction in the Irritability score, as compared with a 14.1 percent decrease in the placebo group (P<0.001). The rate of a positive response, defined as at least a 25 percent decrease in the Irritability score and a rating of much improved or very much improved on the CGI-I scale, was 69 percent in the risperidone group (34 of 49 children had a positive response) and 12 percent in the placebo group (6 of 52, P<0.001). Risperidone therapy was associated with an average weight gain of 2.7+/-2.9 kg, as compared with 0.8+/-2.2 kg with placebo (P<0.001). Increased appetite, fatigue, drowsiness, dizziness, and drooling were more common in the risperidone group than in the placebo group (P<0.05 for each comparison). In two thirds of the children with a positive response to risperidone at eight weeks (23 of 34), the benefit was maintained at six months.
                Risperidone was effective and well tolerated for the treatment of tantrums, aggression, or self-injurious behavior in children with autistic disorder. The short period of this trial limits inferences about adverse effects such as tardive dyskinesia.
                Copyright 2002 Massachusetts Medical Society Risperidone is an atypical antipsychotic drug that blocks dopamine as well as serotonin receptor systems. The present study was designed to examine the efficacy and safety of risperidone in a 6-week double-blind, randomized, parallel-group design in the treatment of aggression in adolescents with a primary diagnosis of DSM-IV disruptive behavior disorders and with subaverage intelligence.
                We randomly assigned 38 adolescents (33 boys; 10 subjects with slightly subaverage IQ, 14 with borderline IQ, and 14 with mild mental retardation), who were hospitalized for treatment of psychiatric disorders associated with severe aggression, to receive risperidone or placebo. The main efficacy measures were the Clinical Global Impressions-Severity of Illness scale (CGI-S), the modified Overt Aggression Scale (OAS-M), and the Aberrant Behavior Checklist (ABC). Side effects were measured using the Extrapyramidal Symptom Rating Scale (ESRS).
                The mean daily dose of risperidone at the end of treatment was 2.9 mg (range, 1.5-4 mg). Risperidone, compared with placebo, was associated with significant improvements on the CGI-S (p < .001) and the at-school ABC overall and hyperactivity scales (p < .05). During a 2-week washout following the 6-week trial, a statistically significant worsening was found in the risperidone group on the CGI-S scale, the OAS-M. and the ABC. Extrapyramidal symptoms were absent or very mild during risperidone treatment. Transient tiredness was present in 11 (58%) of 19 drug-treated subjects. Other untoward effects included sialorrhea, nausea, and slight weight gain (mean = 3.5% of body weight in the risperidone group). No clinically relevant changes were found in laboratory parameters, electrocardiogram, heart rate, or blood pressure.
                These results suggest that risperidone may be effective for severe aggression in adolescents with disruptive behavior disorders and subaverage intelligence, and these results are consistent with reports suggesting its effectiveness for treating severe aggression in adolescents in general. The authors compared the effects of maintenance versus withdrawal of risperidone treatment in children and adolescents with symptoms of disruptive behavior disorder.
                Patients with disruptive behavior disorder (5-17 years of age and a range of intellect) who had responded to risperidone treatment over 12 weeks were randomly assigned to 6 months of double-blind treatment with either risperidone or placebo. The primary efficacy measure was time to symptom recurrence, defined as sustained deterioration on either the Clinical Global Impression severity rating (/2 points) or the conduct problem subscale of the Nisonger Child Behavior Rating Form (/7 points). Secondary efficacy measures included rates of discontinuation due to symptom recurrence, disruptive behavior disorder symptoms, and general function. Safety and tolerability were also assessed. Risperidone dosage was based on weight (patients <50 kg: 0.25-0.75 mg/day; patients /50 kg: 0.5-1.5 mg/day).
                Treatment was initiated in 527 patients, with 335 randomly assigned to a double-blind maintenance condition. Time to symptom recurrence was significantly longer in patients who continued risperidone treatment than in those switched to placebo. Symptom recurrence in 25% of patients occurred after 119 days with risperidone and 37 days with placebo. Secondary efficacy measures also favored risperidone over placebo. Weight increased over the initial 12 weeks of treatment (mean weight z score change=0.2, SD=2.7, N=511), after which it plateaued.
                This study is the first placebo-controlled maintenance versus withdrawal trial of its kind in disruptive behavior disorder and provides evidence that patients who respond to initial treatment with risperidone would benefit from continuous treatment over the longer term. Risperidone, an antipsychotic agent with combined serotonin (5-HT2A) and dopamine (D2) receptor-blocking properties, is associated with fewer extrapyramidal side effects in adults than conventional neuroleptics. Approved in 1993 for the treatment of schizophrenia, recent studies have highlighted its potential in other conditions, such as the management of behavioral disturbances. This phase II, double-blind, placebo-controlled study evaluated the efficacy and tolerability of risperidone in the treatment of persistent behavioral disturbances in children with borderline intellectual functioning. Thirteen patients (6-14 years) with low IQ (66-85) were enrolled in and completed the 4-week study. Risperidone, in daily doses of > or = 0.01 mg/kg (mean dose at treatment endpoint = 0.05 mg/kg; mean total dose = 1.2 mg/day), was significantly more effective than placebo in improving Aberrant Behavioral Checklist (ABC) symptom cluster scores for irritation (p < 0.05) and hyperactivity (p < 0.01), Clinical Global Impression score (p < 0.05), the Visual Analogue Scale score for individual target symptom (p < 0.001), and Personal Assessment Checklist scores for social relationships (p < 0.05) and occupational attitudes (p < 0.05). In addition, the improvement in total ABC score in the risperidone-treated group was clinically relevant (65% improvement vs. baseline), whereas the placebo-treated patients only improved 7% versus baseline. There was no difference between risperidone- and placebo-treated groups with respect to the occurrence of extrapyramidal side effects, and risperidone was well tolerated. In conclusion, short-term risperidone treatment was well tolerated and significantly more effective than placebo in controlling behavioral disturbances in children with low IQ. The aim of this study was to study valproate efficacy and safety for aggression in children and adolescents with pervasive developmental disorders (PDD).
                In this prospective double-blind, placebo-controlled study, 30 subjects (20 boys, 10 girls) 6-20 years of age with PDD and significant aggression were randomized and received treatment with valproate (VPA) or placebo (PBO) for 8 weeks as outpatients. Mean VPA trough blood levels were 75.5 mcg/mL at week 4 and 77.8 mcg/mL at week 8.
                No treatment difference was observed statistically between VPA and PBO groups. The Aberrant Behavior Checklist--Community Scale (ABC-C) Irritability subscale was the primary outcome measure (p = 0.65), and CGI--Improvement (p = 0.16) and OAS (p = 0.96) were secondary outcome measures. Increased appetite and skin rash were significant side effects. Only 1 subject was dropped from the study owing to side effects, notably a spreading skin rash, which then resolved spontaneously. Two subjects receiving VPA developed increased serum ammonia levels, one with an associated parent report of slurred speech and mild cognitive slowing. Poststudy, of 16 VPA and PBO subjects receiving VPA, 10 subjects demonstrated sustained response, 4 of whom later attempted taper, with significant relapse of aggression.
                The present negative findings cannot be viewed as conclusive, partly owing to the large placebo response, subject heterogeneity, and size of the groups. Larger studies are needed to expand upon these findings. To evaluate the effects of risperidone augmentation for treatment-resistant aggression in children with attention-deficit/hyperactivity disorder (ADHD).
                Twenty-five children (ages 7-12 years) with attention-deficit/hyperactivity disorder (ADHD) and significant aggressive behaviors were randomized to risperidone or placebo for 4 weeks for this double-blind study. Subjects were already in treatment with a constant dose of psychostimulant medication. The primary efficacy measure was change from baseline in the Children's Aggression Scale-Parent (CAS-P) and -Teacher (CAS-T) total scores.
                The mean risperidone dose at endpoint was 1.08 mg/day. For the CAS-P total score, a significant difference was found (chi(1)(2) = 4.30, p < .05) with 100% of risperidone subjects improving by more than 30% from baseline to endpoint, whereas only 77% of the placebo group reported a similar response. No differences were found on the CAS-T total score. For the CAS-P and CAS-T, no significant interaction was found between treatment group and time. Rates of adverse events did not differ significantly between groups.
                Risperidone treatment appears to be well tolerated and modestly effective when used in combination with psychostimulants for treatment-resistant aggression in children with ADHD. To examine whether risperidone is superior to placebo in the treatment of youths with conduct disorder.
                This was a 10-week, randomized, double-blind, placebo-controlled study with 2 parallel arms. Ten youths were randomly assigned to receive placebo and 10 youths were randomly assigned to receive risperidone. Patients were seen weekly throughout the trial. Medications could be increased at weekly intervals during the first 6 weeks of the study from an initial dose of 0.25 mg or 0.50 mg each morning, depending on patient weight. Patients weighing less than 50 kg had a maximum total daily dose of risperidone of 1.5 mg. Patients weighing 50 kg or greater had a maximum total daily dose of risperidone of 3.0 mg. The primary outcome measure was the Rating of Aggression Against People and/or Property Scale.
                Risperidone was superior to placebo in ameliorating aggression on most measures. Risperidone was reasonably well tolerated, with none of the risperidone-treated patients developing extrapyramidal side effects.
                These data provide preliminary evidence that risperidone may have efficacy in the treatment of youths with conduct disorder. Because of the small sample size and the brief length of this study, further research is necessary to confirm these findings.
There is some limited evidence of efficacy of risperidone reducing aggression and conduct problems in children aged 5 to 18 with disruptive behaviour disorders in the short term.
For aggression, the difference in scores of 6.49 points on the ABC Irritability subscale (range 0 to 45) may be clinically significant. For conduct problems, the difference in scores of 8.61 points on the NCBRF-CP (range 0 to 48) is likely to be clinically significant. 
Caution is required due to the limitations of the evidence and the small number of relevant high-quality studies. The findings from the one study assessing impact in the longer term suggest that the effects are maintained to some extent (small effect size) for up to six months. Inadequately powered studies produced non-significant results. The evidence is restricted by heterogeneity of the population (including below average and borderline IQ), and methodological issues in some studies, such as use of enriched designs and risk of selection bias. No study addressed the issue of pre-existing/concurrent psychosocial interventions, and comorbid stimulant medication and its dosage was only partially addressed. There is currently no evidence to support the use of quetiapine for disruptive behaviour disorders in children and adolescents.
It is uncertain to what degree the efficacy found in clinical trials will translate into real life clinical practice. Participants in the studies were recruited from clinical services but those who agree to take part in the clinical trials are a subset of the overall population presenting for care. There are no research data for children under five years of age. Further high-quality research is required with large samples of clinically representative youths and long-term follow-up to replicate current findings.