Duloxetine-D3 hydrochloride is a serotonin-norepinephrine reuptake inhibitor (SNRI)with a Ki of 4.6 nM,used for the treatment of major depressive disorder and generalized anxiety disorder (GAD). Duloxetine D3 hydrochloride ( (S)-Duloxetine D3 hydrochloride) is a deuterium-labeled Duloxetine hydrochloride (T1471).