Nefazodone-d6 (hydrochloride) is the deuterium labeled Nefazodone hydrochloride. Nefazodone hydrochloride (BMY-13754) is a potent and selective 5HT2A (Ki=5.8 nM) antagonist with moderate inhibition of 5-HT and noradrenaline uptake (IC50 of 290 and 300 nM, respectively). Nefazodone hydrochloride is a phenylpiperazine antidepressant with less alpha-adrenergic blocking activity[1][2].