Patients with a DSM-IV-TR diagnosis of major depressive episode associated with bipolar I disorder , with or without rapid cycling , and with a Montgomery-Asberg Depression Rating Scale ( MADRS ) score @ and a Young Mania Rating Scale ( YMRS ) score @ were randomly assigned to @ weeks of double-blind , once-daily treatment with lurasidone @-@ mg , lurasidone @-@ mg , or placebo .