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Title: Trifluoromethylphenylpiperazine  
Author: World Heritage Encyclopedia
Language: English
Subject: Para-Methoxyphenylpiperazine, 2,5-Dimethoxy-4-propylamphetamine, Lysergic acid 3-pentyl amide, 2CD-5EtO, DMMDA
Collection: Designer Drugs, Organofluorides, Piperazines, Serotonin Receptor Agonists, Serotonin Releasing Agents
Publisher: World Heritage Encyclopedia


Systematic (IUPAC) name
Clinical data
Legal status
Routes of
CAS Registry Number  N
ATC code None
PubChem CID:
ChemSpider  N
Chemical data
Formula C11H13F3N2
Molecular mass 230.23 g/mol

3-Trifluoromethylphenylpiperazine (TFMPP) is a recreational drug of the piperazine chemical class. Usually in combination with its analogue benzylpiperazine (BZP), it is sold as a alternative to the illicit drug MDMA ("Ecstasy") under the name "Legal X".[2][3]


  • Pharmacology 1
  • Use and effects 2
  • Side effects 3
  • Legal status 4
    • Canada 4.1
    • China 4.2
    • Denmark 4.3
    • Japan 4.4
    • Netherlands 4.5
    • New Zealand 4.6
    • Sweden 4.7
    • United Kingdom 4.8
    • United States 4.9
      • Florida 4.9.1
      • Texas 4.9.2
  • See also 5
  • References 6
  • External links 7


TFMPP has affinity for the 5-HT1A (Ki = 288 nM), 5-HT1B (Ki = 132 nM), 5-HT1D (Ki = 282 nM), 5-HT2A (Ki = 269 nM), and 5-HT2C (Ki = 62 nM) receptors, and functions as a full agonist at all sites except the 5-HT2A receptor, where it acts as a weak partial agonist or antagonist.[4] Unlike the related piperazine compound meta-chlorophenylpiperazine (mCPP), TFMPP has insignificant affinity for the 5-HT3 receptor (IC50 = 2,373 nM).[5] TFMPP also binds to the SERT (EC50 = 121 nM) and evokes the release of serotonin.[4] It has no effects on dopamine or norepinephrine reuptake or efflux.[4]

Use and effects

TFMPP is rarely used by itself. In fact, TFMPP reduces locomotor activity and produces aversive effects in animals rather than self-administration, which may explain the decision of the DEA not to permanently make TFMPP a controlled substance.[4] More commonly, TFMPP is co-administered with BZP, which acts as a norepinephrine and dopamine releasing agent.[6] Due to the serotonin agonist effects and increase in serotonin, norepinephrine, and dopamine levels produced by the BZP/TFMPP combination, this mixture of drugs produces effects which crudely mimic those of MDMA.[7]

Consumption can cause a range of side effects including migraine headaches, muscle aches, nausea and vomiting, as well as a come-down syndrome characterized by insomnia, loss of appetite, and headache (see below).

Side effects

The combination of BZP and TFMPP has been associated with a range of side effects, including insomnia, anxiety, nausea and vomiting, headaches and muscle aches which may resemble migraine, seizures, impotence, and rarely psychosis,[3] as well as a prolonged and unpleasant hangover effect. These side effects tend to be significantly worsened when the BZP/TFMPP mix is consumed alongside alcohol, especially the headache, nausea, and hangover.

However, it is difficult to say how many of these side effects are produced by TFMPP itself, as it has rarely been marketed without BZP also being present, and all of the side effects mentioned are also produced by BZP (which has been sold as a single drug). Studies into other related piperazine drugs such as mCPP suggest that certain side effects such as anxiety, headache and nausea are common to all drugs of this class, and pills containing TFMPP are reported by users to produce comparatively more severe hangover effects than those containing only BZP. The drug can also cause the body to tremble for a long period of time.[8]

Legal status

TFMPP is off-white, yellowish in color.


Since 2012, TFMPP has been listed as a Schedule III controlled substance in Canada,[9] making possession of TFMPP a federal offence. It has also been added to Part J of the Food and Drug Regulations thereby prohibiting the production, export or import of the substance.


As of October 2015 TFMPP is a controlled substance in China.[10]


As of December 3, 2005, TFMPP is illegal in Denmark.


Since 2003, TFMPP and BZP became illegal in Japan.


TFMPP is unscheduled in the Netherlands.

New Zealand

Based on the recommendation of the EACD, the New Zealand government has passed legislation which placed BZP, along with the other piperazine derivatives TFMPP, mCPP, pFPP, MeOPP and MBZP, into Class C of the New Zealand Misuse of Drugs Act 1975. A ban was intended to come into effect in New Zealand on December 18, 2007, but the law change did not go through until the following year, and the sale of BZP and the other listed piperazines became illegal in New Zealand as of 1 April 2008. An amnesty for possession and usage of these drugs remained until October 2008, at which point they became completely illegal.[11]


As of March 1, 2006, TFMPP is scheduled as a "dangerous substance" in Sweden.[12]

United Kingdom

As of December 2009, TFMPP has been made a Class C drug in the United Kingdom along with BZP.

United States

TFMPP is not currently scheduled at the federal level in the United States,[13] but it was briefly emergency scheduled in Schedule I. The scheduling expired in April 2004 and was not renewed.[14] However, some states such as Florida have banned the drug in their criminal statutes making its possession a felony.[15]


TFMPP is a Schedule I controlled substance in the state of Florida making it illegal to buy, sell, or possess in Florida.[15]


TFMPP is not scheduled in Texas. It was briefly Schedule I, but was removed from Schedule I in Texas after the US federal government dropped its federal Schedule I status.

See also


  1. ^ "Ustawa z dnia 15 kwietnia 2011 r. o zmianie ustawy o przeciwdziałaniu narkomanii ( Dz.U. 2011 nr 105 poz. 614 )". Internetowy System Aktów Prawnych. Retrieved 17 June 2011. 
  2. ^ "Erowid TFMPP Vault: Basics". Erowid. Retrieved 2014-02-15. 
  3. ^ a b Schep LJ, Slaughter RJ, Vale JA, Beasley DM, Gee P (March 2011). "The clinical toxicology of the designer "party pills" benzylpiperazine and trifluoromethylphenylpiperazine".  
  4. ^ a b c d Baumann MH, Clark RD, Budzynski AG, Partilla JS, Blough BE, Rothman RB (March 2005). "N-substituted piperazines abused by humans mimic the molecular mechanism of 3,4-methylenedioxymethamphetamine (MDMA, or 'Ecstasy')". Neuropsychopharmacology 30 (3): 550–60.  
  5. ^ Robertson DW, Bloomquist W, Wong DT, Cohen ML (1992). "mCPP but not TFMPP is an antagonist at cardiac 5HT3 receptors". Life Sciences 50 (8): 599–605.  
  6. ^ Partilla JS, Dempsey AG, Nagpal AS, Blough BE, Baumann MH, Rothman RB (October 2006). "Interaction of amphetamines and related compounds at the vesicular monoamine transporter". Journal of Pharmacology and Experimental Therapeutics 319 (1): 237–46.  
  7. ^ Yarosh HL, Katz EB, Coop A, Fantegrossi WE (November 2007). "MDMA-like behavioral effects of N-substituted piperazines in the mouse". Pharmacology, Biochemistry and Behavior 88 (1): 18–27.  
  8. ^ Wilkins C, Girling M, Sweetsur P, Huckle T, Huakau J. "Legal party pill use in New Zealand: Prevalence of use, availability, health harms and ‘gateway effects’ of benzylpiperazine (BZP) and trifluorophenylmethylpiperazine (TFMPP)" (PDF). Centre for Social and Health Outcomes Research and Evaluation (SHORE). Retrieved 2007-04-14. 
  9. ^ "SOR/2012-65 March 30, 2012 Controlled Drugs and Substances Act". Canada Gazette. Government of Canada. Retrieved 15 September 2014. 
  10. ^ "关于印发《非药用类麻醉药品和精神药品列管办法》的通知" (in Chinese). China Food and Drug Administration. 27 September 2015. Retrieved 1 October 2015. 
  11. ^ "Misuse of Drugs (Classification of BZP) Amendment Bill 2008". 
  12. ^ "Erowid TFMPP Vault : Legal Status". Erowid. 
  13. ^ §1308.11 Schedule I.
  14. ^ "Scheduling Actions 2002". U.S. Department of Justice, Drug Enforcement Administration (DEA). 
  15. ^ a b Florida Statutes - Chapter 893 - DRUG ABUSE PREVENTION AND CONTROL

External links

  • Erowid: TFMPP Vault
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