Flakka (alpha-pyrrolidinovalerophenone, α-PVP) is a new psychoactive substance, chemically close to cathinone, the primary psychoactive alkaloid of khat (Catha edulis). Like other synthetic cathinones, α-PVP is a potent inhibitor of the dopamine and norepinephrine transporters. Its robust clinical effects include hallucinations, arousal, aggression/violence, and euphoria. In animal models, α-PVP evokes hyperlocomotion and aberrant/stereotypic behaviors. Here, we discuss the history, synthesis, pharmacological mechanisms, metabolism, abuse potential, and societal impact of α-PVP. Today, α-PVP is a tightly controlled substance, currently banned in the United States and other countries worldwide. However, the growing abuse and complex central nervous system (CNS) effects of α-PVP remain poorly understood, necessitating further pharmacological and pharmacogenetic studies of this drug. Its interesting pharmacological profile (co-inhibition of dopamine and norepinephrine, but not serotonin, transporters) also calls for further studies of α-PVP in animal models, to dissect serotonergic from other monoaminergic mechanisms of action of drugs of abuse. Finally, screening α-PVP and related compounds in vivo may foster discovery of new CNS drugs, including developing novel CNS drugs and identifying their molecular targets.

Original languageEnglish
Pages (from-to)168-174
Number of pages7
JournalACS Chemical Neuroscience
Issue number1
Publication statusPublished - 16 Jan 2019
Externally publishedYes


  • anxiety behavior
  • drugs of abuse
  • sedation
  • synthetic cathinone
  • Zebrafish
  • α-PVP


Dive into the research topics of 'DARK Classics in Chemical Neuroscience: α-Pyrrolidinovalerophenone ("Flakka")'. Together they form a unique fingerprint.

Cite this