Overview Effectiveness of Clozapine Versus Olanzapine for Treatment-resistant Schizophrenia Status: Completed Trial end date: 2002-06-01 Target enrollment: Participant gender: Summary This study will determine the effectiveness of clozapine versus olanzapine in treating people with schizophrenia that has not improved with treatment. Phase: Phase 4 Details Lead Sponsor: Harvard Medical SchoolHarvard Medical School (HMS and HSDM)Collaborators: Commonwealth Research Center, MassachusettsDartmouth-Hitchcock Medical CenterEli Lilly and CompanyNational Institute of Mental Health (NIMH)Treatments: ClozapineOlanzapine