To date, there have been relatively few surveys of psychotropic medicine use in individuals with autism. Data were analyzed from three statewide surveys that employed the same questionnaire and survey methodology. The first was done in the Autism Society of North Carolina in 1992-1993 (NC-1, n = 838; Aman et al. 1995); the second was done in the Autism Society of Ohio in 1999 (Ohio, n = 417; Aman et al. 2003), and the third was done again in the Autism Society of North Carolina in 2001 (NC-2, n = 1538; Langworthy-Lam et al. 2002). Response rates ranged from 48%-56%. Longitudinal trends were examined by comparing the NC-1 and NC-2 data, and regional effects were assessed by comparing the NC-2 and Ohio data. There was a very large increase in antidepressant utilization from 1993 to 2001, with significant increases also occurring for antipsychotics, psychostimulants, and alpha-agonists and beta-blockers. Among youths with autism, the use of any psychotropic increased from 30.5% in NC-1 to 45.2% in NC-2. Psychotropic medication patterns were remarkably consistent across North Carolina and Ohio, except that significantly more autism supplements were used in Ohio. We also examined subject and demographic variables across studies and found several robust correlates of psychotropic medication use. Greater age and handicap, and more restrictive placements, were associated with the use of several drug classes. Knowledge of these patterns may help families and medical planners anticipate future needs.

The aim of this study was to assess the prevalence and patterns of psychoactive and over-the-counter medicines in a large cohort of individuals with autism. We conducted a mail survey of 3,228 families that are members of the Autism Society of North Carolina. This is one of the largest chapters of the Autism Society of America. The survey form addressed current medicines used, side effects, demographic characteristics, and medical conditions. Some 1,538 member families within the society (48%) responded to the survey. In all, 703 (45.7%) individuals with autism were taking psychotropic drugs, 191 (12.4%) antiepileptic drugs (AEDs), and 86 (5.7%) supplements for autism. The total number taking psychotropic, antiepileptic, or vitamin treatments was 816 (53.1%). Antidepressants (taken by 21.7% of the sample), antipsychotics (16.8%), and stimulants (13.9%) were the most commonly prescribed agents. Univariate and multivariate analyses were conducted to examine factors associated with treatment. Greater age, more severe autism and mental retardation, and more restricted housing were often associated with greater use of psychoactive agents. These findings suggest that individuals with autism are a frequently medicated group, although the empirical research support for most agents being used is still very limited.

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The Childhood Autism Rating Scale, Second Edition (CARS2; 2010) includes two rating scales; the CARS2-Standard Version (CARS2-ST) and the newly developed CARS2-High Functioning Version (CARS2-HF). To assess the diagnostic agreement between the CARS2 and DSM-IV-TR versus DSM-5 criteria for Autism Spectrum Disorder (ASD), clinicians at community based centers of the University of North Carolina TEACCH Autism Program rated participants seen for a diagnostic evaluation on symptoms of autism using both the DSM-IV-TR and DSM-5 criteria and either the CARS2-HF or the CARS2-ST. Findings suggest that overall, the diagnostic agreement of the CARS2 remains high across DSM-IV and DSM-5 criteria for autism.

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