Overview Add-On Therapy to Risperidonein Schizophrenia Status: Completed Trial end date: 2008-12-01 Target enrollment: Participant gender: Summary These results suggest that the DA neuroprotection provided by DM in the inflammation-related neurodegenerative models is not mediated through the NMDA receptor. Phase: Phase 2/Phase 3 Details Lead Sponsor: National Cheng-Kung University HospitalTreatments: DextromethorphanRisperidone