Pyrovalerone is an inhibitor in the transporters for particular monoamine neurotransmitters, which include dopamine and norepinephrine, blocking their uptake.1,2 ?-Pyrrolidinopentiophenone (hydrochloride) can be an analog of pyrovalerone, lacking only the methyl group that's found about the phenyl moiety of pyrovalerone. Like pyrovalerone, this com