4′-Fluoro-α-pyrrolidinopentiophenone (also known as FPVP and 4-Fluoro-α-PVP) is a stimulant drug of the cathinone class which has been reported as a novel designer drug.
Per NFLIS DEA Synth-Opioids 2020 Annual Report: New cathinone—4F-3-methyl-α-PVP—being seen in Europe, Canada, Australia, and the United States. In 2020, 50 reports of 4F-3-methyl-α-PVP and 27 reports of fluoro-methyl-α-PVP submitted to NFLIS-Drug by participating laboratories.