4-MePPP
4-MePPP (4'-methyl-alpha-pyrrolidinopropiophenone) is a synthetic cathinone stimulant of the pyrrolidinophenone family, a short-chain ring-methylated relative of alpha-PPP and MDPPP. It circulated as an early research chemical alongside the first-generation pyrrolidinophenones. Human pharmacology is uncharacterised; reported effects are anecdotal and describe a shorter, milder stimulant than the longer-chain pyrros.
01 Overview
4-MePPP is an alpha-pyrrolidinophenone ('pyrro') cathinone sold as a 'research chemical'. Its short propiophenone chain is associated in reports with weaker potency and shorter duration than alpha-PVP or MDPV, though the redose pull of the class remains.
The class hazards apply in full: compulsive redosing, cardiovascular strain, harsh comedown and unknown neurotoxicity. There are no controlled human studies, so figures are approximate and drawn from user reports.
02 Mechanism
Presumed inhibitor of dopamine and noradrenaline reuptake with little serotonergic action, typical of the short-chain alpha-pyrrolidinophenone cathinones.
03 Dosing
| Tier | Dose | Route | Notes |
|---|---|---|---|
| Common | 10–40 mg | Insufflated | Faster onset, more compulsive. |
| Common | 20–60 mg | Oral | Anecdotal only. |
04 Effects
| Effect | Magnitude | Evidence | |
|---|---|---|---|
| StimulationEnergy and wakefulness reported by users. | Anecdotal | ||
| Increased focusMild task-oriented stimulation. | Anecdotal | ||
| Appetite suppressionReduced hunger during effects. | Anecdotal |
05 Side effects
| Effect | Severity | Frequency | Evidence | Countermeasures |
|---|---|---|---|---|
| Compulsive redosingUrge to redose repeatedly, driving binges. | Moderate | Most users | Anecdotal | |
| Cardiovascular strainTachycardia and hypertension typical of the class. | Severe | Common | Unconfirmed | |
| Comedown and low moodFatigue and depressed mood after use. | Moderate | Common | Anecdotal |