AnodyneWiki

4-Fluoromethamphetamine

4-FMA

Molecular structure via molpic based on CDK

Physical properties []
Molecular mass	167.22 g/mol ^[1]
Predicted LogP	2.2 ^[1]

Structural Identifiers []
Molecular formula	C₁₀H₁₄FN ^[1]
IUPAC name	1-(4-fluorophenyl)-N-methylpropan-2-amine ^[1]
SMILES	CC(CC1=CC=C(C=C1)F)NC ^[1]
InChI	InChI=1S/C10H14FN/c1-8(12-2)7-9-3-5-10(11)6-4-9/h3-6,8,12H,7H2,1-2H3 ^[1]
InChIKey	YCWZPIHKUYZTFM-UHFFFAOYSA-N ^[1]

Dosing[]

Intravenous []
Light	≤ 20 mg(11x - 84.6%)
Common	20 mg
Strong	20 mg
Heavy	20 - 34.3 mg
Extreme	34.3 mg +(2x - 15.4%)

Oral []
Light	≤ 74.6 mg(6x - 33.3%)
Common	74.6 - 100 mg(5x - 27.8%)
Strong	100 - 110 mg(4x - 22.2%)
Heavy	110 - 123 mg(2x - 11.1%)
Extreme	123 mg +(1x - 5.6%)

Statistically derived dosages via DBI-IGS

We do not take any responsibility for medical complications or loss of life sustained by following these dosages blindly.

4-Fluoromethamphetamine (also known as 4-FMA, Dtxcid901012237, p-Fluoromethamphetamine, [1-(4-fluorophenyl)propan-2-yl](methyl)amine, 1-(4-Fluorophenyl)-2-(methylamino)propane, 1-(4-Fluorophenyl)-2(methylamino)propane, p-Fluoro-N-α-dimethylbenzeneethanamine, 4 Fluoromethamphetamine, Schembl178552 or Akos010037360) is a stimulant and entactogen substance of the amphetamine class.

Chemistry

Stereochemistry []

4-Fluoromethamphetamine is a racemic mixture of the enantiomers.

Stereoisomerism
(R)-4-Fluoromethamphetamine (S)-4-Fluoromethamphetamine
Stereoisomer enumberation with rdkit

Reagents

There are currently 8 reagent-interactions on DrugsPRO

Reagent	Color change
Marquis
Mecke
Mandelin
Liebermann
Robadope
Simon's
Ehrlich
Hofmann

Subjective effects []

class / Stimulant Entactogen

Physical effects
Abnormal heartbeat Appetite suppression Dehydration Dry mouth Increased blood pressure Increased heart rate Increased libido Restless legs Shakiness Stamina enhancement Stimulation Teeth grinding Vasoconstriction

Cognitive effects
Analysis enhancement Cognitive euphoria Compulsive redosing Disinhibition Ego inflation Empathy, effection, and sociability enhancement Focus enhancement Increased music appreciation Mania Motivation enhancement Suggestibility suppression Thought acceleration Wakefulness

Mere / 4-Fluoromethamphetamine []

bonzi / 4-Fluoromethamphetamine []

0xea / 4-Fluoromethamphetamine []
Routes: Intravenous (20 - 100mg) Oral (50 - 125mg) Salts: Hydrochloride Effects: light stimulation Notes: barely active even when intravenously administered softer curve

0xea / 4-Fluoromethamphetamine []

Routes:

Intravenous (20 - 100mg)
Oral (50 - 125mg)

Salts:

Hydrochloride

Effects:

light stimulation

Notes:

barely active even when intravenously administered
softer curve

Experience reports

Erowid

There are currently 11 experience reports involving 4-fluoromethamphetamine on Erowid: []

Legal status []

Canada: 4-Fluoromethamphetamine is a Schedule I substance.
United States: 4-Fluoromethamphetamine is a Unscheduled substance.
Germany: 4-Fluoromethamphetamine is a Anlage II substance.
United Kingdom: 4-Fluoromethamphetamine is a Class A substance.
Australia: 4-Fluoromethamphetamine is a S9 substance.

External links []

References []

National Center for Biotechnology Information. PubChem Compound Summary for CID 11745017, 4-Fluoromethamphetamine. Accessed May 30, 2026. https://pubchem.ncbi.nlm.nih.gov/compound/11745017
U.S. Food and Drug Administration; National Center for Advancing Translational Sciences. 4-Fluoromethamphetamine. UNII: 8LLF59DO7F. Global Substance Registration System. Accessed May 30, 2026. https://gsrs.ncats.nih.gov/ginas/app/beta/substances/8LLF59DO7F