Pyrovalerone is an inhibitor from the transporters for specific monoamine neurotransmitters, such as dopamine and norepinephrine, blocking their uptake.1,two ?-Pyrrolidinopentiophenone (hydrochloride) is undoubtedly an analog of pyrovalerone, missing only the methyl group which is found about the phenyl moiety of pyrovalerone. Like pyrovalerone, th