PMMA Facts
Stimulant;
Description
PMMA (para-methoxymethamphetamine) is a synthetic stimulant of the substituted amphetamine class. It raises serotonin in the brain while blocking the enzyme that breaks serotonin down — producing physiological activation without euphoria.
Subjective effects include rapid heart rate, compulsive yawning, nausea, and dangerous overheating.[1] The experience is defined by absence — physical burden without the euphoria, empathy, or perceptual shift that MDMA produces.
No dependence data exist; the margin between an active and a fatal dose is among the narrowest of any recreational drug.[2] Slow onset encourages redosing before peak effects arrive, and the dual mechanism — serotonin release plus enzyme blockade — can produce lethal serotonin overload.[3][4]
Dose and durationby route · individual sensitivity varies
Starts in 45 – 90 minLasts 3 – 5 hoursAfter-effects 2 – 4 hours
Body and dependence
- Acute toxicity
- Critical
- Chronic toxicity
- Moderate
- Physical dependence
- None
- Psychological dependence
- Negligible
- Withdrawal
- None recorded
- Compulsive redosing
- Low
Tolerance
- Builds
- Moderate
- Fully resets after
- Not recorded
- Carries over to
- MDMA;
PMA; amphetamine
Effectslikely at a common dose
- Perception
- none likely · 4 possible
- Body
- Stimulation;
Temperature dysregulation; Excessive sweating; +23 possible, including Dehydration sensation, Abnormal heartbeat, Vasoconstriction - Thinking
- none likely · 5 possible, including Compulsive redosing urge, Cognitive impairment, Confusion
- Feeling
- none likely · 4 possible, including Anxiety
Who shouldn't take it
Combinations60 recorded
Seek help immediately if
- Overheating / very high body temperature — heavy sweating, then hot dry skin (the leading cause of MDMA deaths, worse when dancing in hot venues)
- Muscle rigidity, jaw clenching, tremor, or twitching (possible serotonin syndrome)
- Fast, pounding heartbeat; chest pain
- Agitation, confusion; seizures
- Hyponatremia (water intoxication) — headache, confusion, drowsiness, vomiting, and seizures from drinking too much water
- Nausea/vomiting; collapse or unconsciousness
What to do
- Move them somewhere cool and help them cool down — overheating is the main danger
- Sip water to stay hydrated but DO NOT overdrink — roughly a cup (250 ml) per hour if active; too much water can be deadly (hyponatremia)
- Get them to rest and stop dancing
- For overheating, seizures, chest pain, muscle rigidity/tremor, confusion, or unresponsiveness, call emergency services
- Recovery position if drowsy or vomiting; stay with them
- Be ready to give rescue breaths / CPR
Most resolve with cooling, rest, sensible hydration, and time. The life-threatening dangers are hyperthermia, serotonin syndrome, and hyponatremia (too much water) — each a medical emergency, not something to wait out.
988 Suicide & Crisis LifelineFireside Project: 62-FIRESIDE
References
- [1]
- [2]^Vevelstad M, Øiestad EL, Middelkoop G, Hasvold I, Lilleng P, Delaveris GJ, Eggen T, Mørland J, Arnestad M (2012) The PMMA epidemic in Norway: comparison of fatal and non-fatal intoxications — Forensic Science International doi:10.1016/j.forsciint.2011.12.014
- [3]^Páleníček T, Balíková M, Rohanová M, Novák T, Horáček J, Fujáková M, Höschl C (2011) Behavioral, hyperthermic and pharmacokinetic profile of para-methoxymethamphetamine (PMMA) in rats — Pharmacology, Biochemistry, and Behavior doi:10.1016/j.pbb.2010.12.011
- [4]^Liechti ME (2015) Novel psychoactive substances (designer drugs): overview and pharmacology of modulators of monoamine signaling — Swiss Medical Weekly doi:10.4414/smw.2015.14043