Methylenedioxypyrovalerone (MDPV) is a psychoactive drug with stimulant properties which acts as a norepinephrine-dopamine reuptake inhibitor (NDRI). The hydrochloride salt exists as a very fine, hygroscopic, crystalline powder that tends to clump to itself, resembling something like powdered sugar. Impurities are likely to consist of either pyrrolidine or alpha-dibrominated alkylphenones from either excess pyrrolidine or incomplete amination, respectively, during synthesis. These impurities likely account for its discoloration and fishy (pyrrolidine) or bromine-like odor, which worsens upon exposure to air, moisture, or bases. MDPV has been shown to produce robust reinforcing effects and compulsive self-administration in rats, though this had already been provisionally established by a number of documented cases of misuse and addiction in humans, before the animal tests had been carried out.
-O243.gif)