 6. Inability of parents or care takers to give informed consent, travel to the visits, administer medication, or arrange for completion of rating scales. Other non-antipsychotic medications and non-pharmacological treatments will be allowed if started at least 2 months prior to the initial screening and must remain constant for the 8 weeks of this study. These treatments will be recorded as will a history of past trials of medications. Prohibiting ongoing treatment would be difficult to justify to parents and to the IRB and would make adequate recruitment for this pilot study difficult. 