4-FMA

4-Fluoromethamphetamine (also known as 4-FMA) is a lesser-known novel stimulant-entactogen substance of the amphetamine class. 4-FMA is chemically related to 4-FA and methamphetamine. Little is known about its pharmacology, but it likely produces its effects by increasing levels of dopamine, norepinephrine, and serotonin in the brain.

Also known as: 4-fluromethamphetamine, 4-Fluoro-Metamphetamine (4-FMA), 4-fluoromethamphetamine

Classification

Chemical: Amphetamine
Psychoactive: Entactogen
Psychoactive: Psychedelic
Psychoactive: Stimulant
Tag: Empathogen
Tag: Habit-Forming
Tag: Research-Chemical
Tag: Substituted amphetamine

Effects

Increased Energyalertness
Decreased Need For Sleep
Decreased Appetite
Weight Loss
Sweating
Disturbed Sleep Patterns
Euphoria
Increased Sociability
Mood Lift
Excessive Talking
Aggressiveness
Moodiness
Increased Sexuality
Visual And Auditory Hallucinations
Vibrating Vision
Dehydration
Increased Libido
Disinhibition

Routes of Administration

Oral

Dosage

Common: 75-125 mg
Heavy: 125-200 mg
Light: 50-75 mg
Threshold: 10 mg
Strong: 100-125 mg

Duration

Onset: 0.3-0.7 h
Comeup: 0.3-0.7 h
Peak: 2-5 h
Offset: 1-2 h
After Effects: 3-12 h

Harm Reduction

Check interactions before mixing substances, pay attention to dose spacing and hydration, and treat all dosage guidance as approximate rather than guaranteed safe.

Sources

Substance data is aggregated from the following public harm-reduction and reference sources.

Links

This static page is intended as a readable non-JS and prerender-friendly library export.

Get the full DrugsPRO experience

Open the interactive DrugsPRO app for search, saved items, interactions, and deeper harm reduction tools.

Get the PRO test kit. The simple, quick and reliable drug checking test kit. Visit https://protestkit.eu