ScienceDaily for August 9, 2010 reported on Autism and antidepressants.
Autistic spectrum disorders are difficult to treat because of the range of symptoms experienced by patients, including difficulties with social interactions and communication. SSRIs are among the most commonly prescribed medications, although none have been specifically approved by any drug authority for use in autism. In the UK, most antidepressants are not approved for children for any condition. The rationale behind the use of SSRIs in autism is that they act on serotonin, the same chemical in the body that is responsible for some of the psychological processes affected by the condition.