 4. In addition to the diagnosis of autistic disorder, ASD or Asperger, any other Axis I disorder that requires inpatient hospitalization during this study, or is at the time of enrollment worsening relative to baseline. We will not completely exclude all Axis I disorders, because it is typical for patients with autism ASD to carry comorbid Axis I disorders, including Generalized Anxiety Disorder GAD, social phobia, obsessive compulsive disorder OCD, dysthymia, Major Depressive Disorder. 