4′-Fluoro-α-pyrrolidinooctanophenone, alternatively referred to as 4-Fluoro-PV-9, FPOP, or 4-Fluoro-α-POP, is classified as a cathinone stimulant. This compound has gained recognition as an emerging designer drug with novel properties.

IUPAC name
CAS Number1829588-09-1 
PubChem CID121262705
Chemical and physical data
Molar mass291.410 g·mol−1


4-F-α-POP is illegal in Japan.


  • What is 4′-Fluoro-α-pyrrolidinooctanophenone (4-Fluoro-PV-9)?
  • 4′-Fluoro-α-pyrrolidinooctanophenone, or 4-Fluoro-PV-9, is a synthetic stimulant drug in the cathinone class. It is considered a designer drug, which means it was created to mimic the effects of controlled substances while avoiding legal restrictions.
  • What are the common street names for 4-Fluoro-PV-9?
  • Street names for this substance may vary, but they could include “4-Fluoro-PV-9,” “4-F-PV-9,” or other aliases. These names may be used in an attempt to avoid legal scrutiny.
  • How is 4-Fluoro-PV-9 used?
  • 4-Fluoro-PV-9 is typically consumed orally or through other methods like insufflation (snorting). Users may also vaporize or smoke it. The route of administration can affect the intensity and duration of its effects.
  • What are the effects of 4-Fluoro-PV-9?
  • The effects of 4-Fluoro-PV-9 can be similar to other stimulant drugs. Users may experience increased alertness, energy, and a sense of euphoria. However, it can also lead to negative effects such as anxiety, paranoia, and increased heart rate.
  • Is 4-Fluoro-PV-9 legal?
  • The legal status of 4-Fluoro-PV-9 varies by country and region. It is often considered illegal in many places due to its classification as a designer drug. However, legal statuses can change, so checking local laws and regulations is crucial.
  • Is 4-Fluoro-PV-9 safe to use?
  • The safety of 4-Fluoro-PV-9 is not well-established. Designer drugs like this often lack comprehensive research on their long-term effects and potential health risks. Using such substances can be dangerous and unpredictable.
  • Can 4-Fluoro-PV-9 be detected in drug tests?
  • Detection of 4-Fluoro-PV-9 in drug tests may be possible using specialized tests, but it is not typically included in standard drug screenings. Always consult with a medical professional or testing authority for accurate information on drug testing.
  • What are the risks associated with 4-Fluoro-PV-9 use?
  • Using 4-Fluoro-PV-9 carries various risks, including potential addiction, adverse psychological effects, and physical health consequences. Since it is a designer drug, its production lacks quality control and consistency, making it even riskier.
  • Is 4-Fluoro-PV-9 addictive?
  • Designer stimulants like 4-Fluoro-PV-9 have the potential for addiction, and users have reported compulsive use and cravings. The lack of comprehensive research makes it challenging to determine the exact addictive potential.
  • Where can I find more information about 4-Fluoro-PV-9?
  • For more information on 4-Fluoro-PV-9, consult local or national health agencies, substance abuse services, and medical professionals. Remember that using such substances is discouraged due to their potential risks and legal implications.


  1. “4-Fluoro-PV-9.” Cayman Chemical.
  2. Majchrzak M, Rojkiewicz M, Celiński R, Kuś P, Sajewicz M (January 2016). “Identification and characterization of a new designer drug, 4-fluoro-PV9, and α-PHP in seized materials.” Forensic Toxicology. 34 (1): 115–124. doi:10.1007/s11419-015-0295-4. PMC 4705138. PMID 26793278.
  3. “指定薬物名称・構造式一覧(平成27年9月16日現在)” (PDF) (in Japanese). 厚生労働省. September 16, 2015. Retrieved October 8, 2015.

Leave a Comment

Your email address will not be published. Required fields are marked *