- Participants must have DSM-IV diagnosis of OCD and bipolar (I or II) disorder, displaying current OCD symptoms of at least moderate impairment (CY-BOCS ≥ 15) and for at least 4 weeks prior to participation maintained on steady dose of mood stabilizing medication (lithium, anticonvulsants or atypical antipsychotics) with minimal or mild mood symptoms (YMRS ≤ 15). Period of mood stabilization will be determined by clinician judgment and confirmed by K-SADS-E.