2-FMA

Stimulant

A long-acting stimulant often compared to lisdexamphetamine. Thought to lack some of amphetamine's neurotoxic metabolites. Very functional, and for this reason it is commonly used for studying.

2fma

Dose and effect data: PsychonautWiki (CC BY-SA 4.0) and TripSit (PolyForm Noncommercial 1.0.0). Less-used substance: fewer independent sources, so treat these numbers with extra caution.

Before you dose

⚠This substance's dose is not reliably weight-scaled - the ranges shown are population figures. Sensitivity varies far more between people than body mass explains.

⚠This substance has combinations that are life-threatening. Check the Interactions tab before mixing anything.

Dose

Published population range

Threshold5 mg

Light5–15 mg

Common15–30 mg

Strong30–50 mg

Heavy / risk zone≥ 50 mg

No weight-based model for this substance — published ranges only.

Check an amount you already have

Timeline (insufflated)

Onset20–40 minutes

Come-up10–20 minutes

Peak60–180 minutes

Offset90–180 minutes

Afterglow120–240 minutes

Total240–360 minutes

Bars show relative time in each phase, scaled to the total duration. Each phase keeps its colour in the list above.

Expected effects

Alertness and focus
Mild euphoria
Energy

Possible side effects

Raised heart rate and blood pressure
Insomnia
Appetite loss
Anxiety
Little long-term safety data

Known toxicity

exact toxic dosage is unknown

Harm reduction

Test your substance. Cocaine, amphetamine and MDMA powders are routinely cut with fentanyl or nitazenes, and stimulant pills are frequently counterfeits.
Do not mix stimulants with each other, with alcohol, or with MAOIs, SSRIs or tramadol - the cardiovascular and serotonin risks compound.
Watch body temperature. Overheating and dehydration cause more stimulant emergencies than heart attacks do. Take breaks, cool down with water and air, and sip (do not gulp) fluids.
Eat and sleep. Sleep deprivation plus stimulants is the standard route into stimulant psychosis.
Do not re-dose compulsively. Set a maximum before you start, and give it to someone else to hold you to.
Chest pain, severe headache, one-sided weakness, slurred speech or fainting are medical emergencies. Call for help immediately.
Nasal use damages the septum and sinuses; chronic use causes permanent damage that does not heal.

Identify what you have

Marquis (TripSit reference)Light yellow

Marquis (reacts)orange (89)

Mecke (reacts)yellowish (67)

Mandelin (reacts)brown > yellow (234)

Liebermann (reacts)orange (89)

Froehdeno color change (241)

Ehrlichno color change (168)

Robadopeno pink color change (121)

Simon's (reacts)instant blue (61)

Hofmannno color change (137)

Morris (reacts)pale green (77)

Reagent tests show what a substance probably is, not how pure it is or what else is in the mix. Fentanyl and nitazene test strips are the only reliable check for those, and quantitative lab testing is better than both.