TFMPP
TFMPP (3-trifluoromethylphenylpiperazine) is a serotonergic piperazine most often combined with BZP in 'party pills' to add MDMA-like empathogenic character. Alone it is largely non-recreational and can be dysphoric, and it carries serotonergic risks.
01 Overview
TFMPP is a piperazine derivative that acts primarily on serotonin systems rather than as a classical stimulant. It was rarely used alone recreationally; instead it was paired with the stimulant BZP so the combination would loosely mimic the stimulant-plus-empathogen profile of MDMA.
On its own, TFMPP tends to produce headache, nausea and little euphoria, and higher doses can be dysphoric. Its serotonin-releasing action raises the theoretical risk of serotonin toxicity, particularly when combined with other serotonergic drugs.
02 Mechanism
Acts as a serotonin releaser and agonist at multiple 5-HT receptor subtypes (including 5-HT1A, 5-HT1B and 5-HT2C), contributing empathogenic and serotonergic effects.
03 Dosing
| Tier | Dose | Route | Notes |
|---|---|---|---|
| Light | 25–50 mg | Oral | Anecdotal; commonly used with BZP rather than alone. |
| Common | 50–100 mg | Oral | Typically dosed alongside BZP in a roughly 1:1 to 1:2 ratio. |
04 Effects
| Effect | Magnitude | Evidence | |
|---|---|---|---|
| Empathogenic characterContributes warmth and MDMA-like character when combined with BZP. | Anecdotal | ||
| Mild sedationSerotonergic action can produce a calmer, less purely stimulated state. | Anecdotal |
05 Side effects
| Effect | Severity | Frequency | Evidence | Countermeasures |
|---|---|---|---|---|
| Headache and nauseaHeadache, nausea and malaise are common, especially when taken alone. | Moderate | Very common | Anecdotal | |
| Dysphoria at higher dosesHigher doses tend to produce discomfort and low mood rather than euphoria. | Moderate | Common | Anecdotal | |
| Serotonin toxicity riskSerotonin-releasing action raises risk of serotonin syndrome, particularly with other serotonergic drugs. | Severe | Rare | Observational |