Overview Once Weekly D-cycloserine for Schizophrenia Status: Withdrawn Trial end date: 2011-06-01 Target enrollment: Participant gender: Summary This is a parallel-group, placebo-controlled trial examining the cognitive effects at weeks 1, 4, & 8 of once-weekly oral D-cycloserine 50 mg added to a stable dose of antipsychotic for 8 weeks in adult outpatients with schizophrenia. Phase: Phase 4 Details Lead Sponsor: Massachusetts General HospitalCollaborator: National Institute of Mental Health (NIMH)Treatments: Cycloserine