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3-FMA
3-FMA is a synthetic fluorinated amphetamine1 that produces stimulant and entactogenic effects. It is structurally related to methamphetamine,2 with a fluorine atom at the 3-position of the phenyl ring.3 Early reports describe moderately potent, relatively short-lived effects. It entered the designer drug market after 3-FEA and is considered likely to be habit-forming.
Dosage & Duration
Dosage
Doses are population estimates that vary widely between individuals.
Threshold5 mg
Light10-20 mg
Moderate20-35 mg
Strong35-50 mg
Heavy50+ mg
Duration
Onset20-60 minutes
Come Up30-60 minutes
Peak2-4 hours
Offset1-3 hours
After Effects6-12 hours
Total3-7 hours
Subjective Effects
Subjective Effects not written up yet
Pharmacology
Pharmacodynamics
Based on similarities to related substituted amphetamines, 3-FMA is presumed to promote the release of serotonin, dopamine, and norepinephrine. Preliminary reports suggest a stronger action on serotonin, although its mechanism remains uncertain and may involve monoamine reuptake inhibition.
Pharmacokinetics
Absorption & half-lifenot documented yetMetabolitesnone documented yet
Interactions
Interactions not written up yet
An unlisted combination is an unknown one, not a safe one. Check a dedicated combination chart before mixing.
Tolerance
Tolerance timelines are rules of thumb, not exact schedules, and vary widely between individuals and use patterns.
Prolonged, repeated use of 3-FMA produces tolerance to many of its effects, so larger doses are needed to achieve the same effects.
Without further use, tolerance takes approximately 1–10 days to return to baseline.
Without further use, tolerance takes approximately 3–7 days to fall to half.
Dopaminergic stimulants (amphetamine), Serotonergic stimulants, Entactogens (MDMA), All stimulants, including atypical stimulants
Harm Potential
Addiction & Dependence
Psychological
ModerateLong-term use of 3-FMA is associated with moderate addiction risk, high abuse potential, and possible psychological dependence in some users. Abrupt discontinuation may be followed by cravings and withdrawal effects.
Toxicity
Due to putative serotonin-releasing properties, long-term use may potentially cause cardiotoxicity through excess 5-HT2B receptor activity, similar to effects seen with fenfluramine and MDMA; this risk remains theoretical and unstudied for 3-FMA specifically.
Psychosis Risk
Abuse at high dosages for prolonged periods can potentially result in stimulant psychosis presenting with paranoia, hallucinations, or delusions. Approximately 5-15% of users who develop amphetamine-induced psychosis fail to recover completely.
History & Culture
3-FMA became available in mid-2017, entering the designer drug market after the introduction of 3-FEA. It was sold through online research chemical vendors. The emergence of both compounds on the research chemical market coincided with increased efforts to control 4-FA.
Legality
International
Many jurisdictions are described as legally uncertain for 3-FMA, especially where analogue laws or intent-related facts matter.
By Country
Illegal8
United StatesIllegal (analog/blanket ban)3-FMA is not separately named in the Drug Enforcement Administration's controlled-substances list dated August 27, 2026. Under the Controlled Substances Act, it is treated as a Schedule I controlled substance to the extent that it satisfies the statutory definition of a controlled substance analogue and is intended for human consumption. In that circumstance, knowing or intentional unauthorized possession, manufacture, distribution, dispensing, or possession with intent to manufacture, distribute, or dispense is unlawful under federal law. The federal analogue provisions have applied since October 27, 1986, and do not determine the law of any state, territory, tribal jurisdiction, or locality.
CanadaIllegal (analog/blanket ban)3-FMA (3-fluoromethamphetamine) is controlled as a methamphetamine analogue under Schedule I, item 18, of the Controlled Drugs and Substances Act. Health Canada's current Drug Analysis Service classification maps fluoromethamphetamine to that item, which expressly covers methamphetamine analogues. Unauthorized possession, trafficking, possession for trafficking, import, export, possession for export, and production are prohibited.
ChinaIllegal3-FMA is listed by its exact name as item 16 in the 2025 Catalogue of Non-Medical Narcotic Drugs and Psychotropic Substances. It has been controlled since 1 October 2015. Production, trade, use, storage, transport, import, and export are prohibited, subject to regulated exceptions for experimental or scientific use, reference standards, and production intermediates.
GermanyIllegalGesetz über den Verkehr mit Betäubungsmitteln (Betäubungsmittelgesetz – BtMG), Anlage I (zu § 1 Abs. 1) (nicht verkehrsfähige Betäubungsmittel)2425262728
3-FMA (3-Fluormethamfetamin) is expressly listed in Anlage I of the Betäubungsmittelgesetz as a non-marketable narcotic drug. The listing took effect on 13 December 2014. Under § 3, authorization is required to manufacture, trade in, import, export, supply, sell, otherwise place on the market, or acquire narcotic drugs, and authorization for Anlage I substances may be granted only exceptionally for scientific or other public-interest purposes. Under § 29(1), unauthorized manufacture, trade, import, export, sale, supply, other placing on the market, acquisition or procurement, and possession without written acquisition authorization are punishable by imprisonment for up to five years or a fine. For a small quantity intended solely for personal consumption, § 29(5) permits, but does not require, a court to refrain from punishment.
New ZealandIllegal (analog/blanket ban)3-FMA is covered as a Class C controlled drug by the amphetamine-analogue description in Schedule 3 Part 7 of the Misuse of Drugs Act 1975. Its 1-amino-2-phenylethane nucleus carries a methyl group on nitrogen, a methyl group on the carbon adjacent to nitrogen, and a fluorine substituent on the benzene ring, all of which the generic description permits. This classification has applied since 13 January 1988. Subject to the Act's exemptions, licences, regulations, and the special defence in section 29C for certain non-pharmacological possession, prohibited conduct includes possession, procurement, use, import, export, production, manufacture, supply, administration, sale, and offers to supply, administer, or sell.
SwitzerlandIllegalVerordnung des EDI vom 30. Mai 2011 über die Verzeichnisse der Betäubungsmittel, psychotropen Stoffe, Vorläuferstoffe und Hilfschemikalien (Betäubungsmittelverzeichnisverordnung, BetmVV-EDI), Anhang 6, Verzeichnis e343536
3-FMA is expressly listed as 3-Fluormethamphetamin and 1-(3-Fluorphenyl)-N-methylpropan-2-amin in Annex 6, Verzeichnis e, of the Betäubungsmittelverzeichnisverordnung. Verzeichnis e substances are subject to the control measures applicable to Verzeichnis a narcotics and may be cultivated, manufactured, imported, exported, stored, used, or placed on the market only with authorization from the Federal Department of Home Affairs. Unauthorized conduct is punishable by up to three years' imprisonment or a monetary penalty.
TurkeyIllegal2013/5742 Bazı Maddelerin 2313 Sayılı Uyuşturucu Maddelerin Murakabesi Hakkında Kanun Hükümlerine Tabi Tutulması Hakkında Karar, ek liste sıra 49; Uyuşturucu Maddelerin Murakabesi Hakkında Kanun No. 2313, madde 19; Türk Ceza Kanunu No. 5237, maddeler 188 ve 191212223
3-FMA, identified as (RS)-1-(3-fluorophenyl)-N-methylpropan-2-amine, is expressly named at item 49 of the list annexed to Council of Ministers Decision No. 2013/5742, which subjects the listed substances to Law No. 2313 on the Control of Narcotic Drugs. Under Turkish Penal Code article 188, unauthorized manufacture, import, or export is punishable by twenty to thirty years' imprisonment and a judicial fine of 2,000 to 20,000 days; unauthorized domestic sale, offering for sale, supply, dispatch, transport, storage, purchase, acceptance, or possession is punishable by at least ten years' imprisonment and a judicial fine of 1,000 to 20,000 days. Article 191 provides two to five years' imprisonment for purchasing, accepting, or possessing a narcotic or stimulant substance for personal use, or for using one.
United KingdomIllegal3-FMA is a Class A controlled drug under Schedule 2 Part I paragraph 1(c) of the Misuse of Drugs Act 1971 because it is an N-alkyl-alpha-methylphenethylamine with a fluoro substituent on the phenyl ring and falls within the provision's generic structural definition. The generic class has applied since 20 September 1977 and remains in the current revised provision; its exclusions for methoxyphenamine and compounds specified in paragraph 1(a) do not cover 3-FMA. Possession, possession with intent to supply, production, supply, and offering to supply are prohibited, subject to applicable regulations and statutory defences.
Not scheduled1
FranceNot scheduledArrêté du 22 février 1990 fixant la liste des substances classées comme stupéfiants, as modified by ANSM decisions and consolidated 26 June 2026; Arrêté du 22 février 1990 fixant la liste des substances psychotropes, as modified and consolidated 3 July 2026171819920
3-FMA (3-fluoromethamphetamine; 1-(3-fluorophenyl)-N-methylpropan-2-amine) is not listed by name or covered by an applicable generic structural class in France's consolidated narcotics and psychotropics schedules under the two orders of 22 February 1990, as amended by ANSM decisions. Annex III of the narcotics schedule lists amphetamine, methamphetamine, and 4-fluoroamphetamine, but 3-FMA is neither a salt nor a stereoisomer of those substances. The generic cathinone class does not apply because 3-FMA has no ketone, and the Annex IV phenethylamine class requires an N-benzyl substituent that 3-FMA does not have. Accordingly, 3-FMA is unscheduled under these national lists, but this classification does not establish that every form of sale, importation, supply, advertising, or use is lawful under other French law.
References
Citations
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