Paroxetine (hydrochloride hemihydrate) (Standard) is the analytical standard of Paroxetine (hydrochloride hemihydrate). This product is intended for research and analytical applications. Paroxetine hydrochloride hemihydrate is a potent selective serotonin-reuptake inhibitor, commonly prescribed as an antidepressant and has GRK2 inhibitory ability with IC50 of 14?µM.