Efficacy and Safety of MT-5199 in Subjects With Tardive Dyskinesia

Inclusion Criteria: * Have one of the following clinical diagnoses for at least 3 months prior to screening: Schizophrenia or Schizoaffective Disorder, Bipolar Disorder, or Depressive Disorders. * Have a clinical diagnosis of neuroleptic-induced TD. * Have moderate or severe TD. * If using maintenance medication(s) for schizophrenia or schizoaffective disorder, or bipolar disorder, or depressive disorders, be on stable doses. Exclusion Criteria: * Have an active, clinically significant unstable medical condition in screening period. * Have a significant risk of suicidal or violent behavior. * Have a known history of long QT syndrome or cardiac tachy-arrhythmia. * Are currently pregnant or breastfeeding.