1-(3-Trifluoromethylphenyl)piperazine (TFMPP) is an entactogenic drug which selectively promotes the release of serotonin. When used in combination with 1-benzylpiperazine, TFMPP increases both serotonin and dopamine, mirroring the effects of 3,4-methylenedioxymethamphetamine. Drug-drug synergism may induce seizures. TFMPP has been identified in party pills and powders. Its metabolism in rats has been described. This product is intended for forensic applications.