The seven most frequently prescribed classes of psychoactive drugs were antidepressants, stimulants, tranquilizers/antipsychotics, anticonvulsants, hypotensive agents, anxiolytic/sedative/hypnotics, and benzodiazepines. The data on other relevant diagnoses indicate that children and youth are frequently treated with medication under an autism-spectrum diagnosis, even though the target symptoms may be commonly associated with other mental disorders. Age data indicate that about 70% of children with autism-spectrum disorders age 8 yr and up receive some form of psychoactive medication in a given year.