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Use of Antipsychotic Medications by Children and Adolescents Associated With Significant Weight Gain

CHICAGO -- October 27, 2009 -- Many paediatric and adolescent patients who received second-generation antipsychotic medications experienced significant weight gain, along with varied adverse effects on cholesterol and triglyceride levels and other metabolic measures, according to a study in the October 28 issue of JAMA.

Treatment for psychotic disorders, bipolar disorder, and nonpsychotic mental disorders for children and adolescents in the United States often includes second-generation antipsychotic medications. "Increasingly, the cardiometabolic effects of second-generation antipsychotic medications have raised concern. Cardiometabolic adverse effects, such as age-inappropriate weight gain, obesity, hypertension, and lipid and glucose abnormalities, are particularly problematic during development because they predict adult obesity, the metabolic syndrome, cardiovascular morbidity, and malignancy," the authors wrote. The cardiometabolic effects of these medications have not been sufficiently studied in children and adolescent patients who have not previously received them, according to background information in the article.

Christoph U. Correll, MD, Zucker Hillside Hospital, North Shore-Long Island Jewish Health System, Glen Oaks, and The Feinstein Institute for Medical Research, Manhasset, New York, and colleagues conducted a study of weight and metabolic changes in a group of 272 paediatric patients (ages 4 to 19 years) who had not previously received antipsychotic medication. Patients had mood spectrum (47.8%), schizophrenia spectrum (30.1%), and disruptive or aggressive behaviour spectrum (22.1%) disorders. Fifteen patients who refused participation or were nonadherent to medications served as a comparison group. Patients were treated with the antipsychotic medications aripiprazole, olanzapine, quetiapine, or risperidone for 12 weeks.

After a median of 10.8 weeks of treatment, weight increased by an average of 8.5 kg (18.7 lbs) with olanzapine (n = 45), by 6.1 kg (13.4 lbs) with quetiapine (n = 36), by 5.3 kg (11.7 lbs) with risperidone (n = 135), and by 4.4 kg (9.7 lbs) with aripiprazole (n = 41) compared with minimal weight change of 0.2 kg (0.4 lbs) in the untreated comparison group (n = 15). "Each antipsychotic medication was associated with significantly increased fat mass and waist circumference," the authors wrote. "Altogether, 10% to 36% of patients transitioned to overweight or obese status within 11 weeks."

The researchers also found that adverse changes during the study period reached statistical significance for olanzapine and quetiapine for total cholesterol, triglycerides, non-high-density lipoprotein (HDL) cholesterol, and ratio of triglycerides to HDL cholesterol. "With risperidone, levels of triglycerides increased significantly. Metabolic baseline-to-endpoint changes were not significant with aripiprazole or in the untreated comparison group. Patients receiving quetiapine had modestly higher incidence rates of hyperglycaemia and the metabolic syndrome and patients receiving olanzapine experienced the highest incidence rates."

The authors noted that these results are concerning because they include fat mass and waist circumference, which are associated with the metabolic syndrome in adults treated with antipsychotic medications and heart disease in the general population. "Moreover, abnormal childhood weight and metabolic status adversely affect adult cardiovascular outcomes via continuation of these risk factors or independent or accelerated mechanisms."

"Our results, together with data from first-episode studies, suggest that guidelines for antipsychotic medication exposure for vulnerable paediatric and adolescent patients naïve to antipsychotic medication should consider more frequent [eg, biannual] cardiometabolic monitoring after the first 3 months of treatment. Finally, in view of poor physical health outcomes and suboptimal metabolic monitoring in the severely mentally ill, the benefits of second-generation antipsychotic medications must be balanced against their cardiometabolic risks through a careful assessment of the indications for their use, consideration of lower-risk alternatives, and proactive adverse effect monitoring and management," the authors concluded.

In an accompanying editorial, Christopher K. Varley, MD, and Jon McClellan, MD, of Seattle Children's Hospital, Seattle, Washington, wrote that these findings indicate there are other factors to consider regarding the use of atypical antipsychotic medications in children and adolescents.

"These medications can be lifesaving for youth with serious psychiatric illnesses such as schizophrenia, classically defined bipolar disorder, or severe aggression associated with autism. However, given the risk for weight gain and long-term risk for cardiovascular and metabolic problems, the widespread and increasing use of atypical antipsychotic medications in children and adolescents should be reconsidered."

SOURCE: JAMA

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