Overview Memantine as Adjunctive Therapy for Schizophrenia Negative Symptoms Status: Completed Trial end date: 2008-03-01 Target enrollment: Participant gender: Summary Memantine as an add-on therapy to clozapine may improve schizophrenia negative symptoms and cognitive functioning. Phase: Phase 4 Details Lead Sponsor: Hospital de Clinicas de Porto AlegreTreatments: ClozapineMemantine