Vilazodone-d8 hydrochloride is deuterated labeled Vilazodone (HY-14262). Vilazodone (EMD 68843, SB 659746A) is a potent, selective and orally active serotonin reuptake inhibitor (SSRI) and partial 5-HT1A receptor agonist. Vilazodone exhibits antidepressant efficacy in vivo can be used for the research of major depressive disorder (MDD) and affective disorders[1][2].