2-FA
2-FA is a synthetic stimulant of the substituted amphetamine class, distinguished by a fluorine atom at the 2-position of the amphetamine structure.citation needed It first emerged on the online research chemical market in the 2010s as part of a series of fluorinated amphetamine analogs. Among these, 2-FA is regarded as the most closely resembling conventional amphetamine in its subjective effects and is frequently compared to dextroamphetamine. It is considered habit-forming.
Dosage & Duration
Dosage
Doses are population estimates that vary widely between individuals.
Duration
Subjective Effects
Legacy content. A statistically backed ontology from Mindstate Design Labs is coming soon.
The experience is that of a classical stimulant: elevated mood, increased energy and alertness, heightened sociability, and a reduced need for food and sleep. 2-FA is frequently described as a smoother, more functional alternative to amphetamine, with a comparatively clear headspace and a gentler comedown that makes it amenable to productivity-oriented use. Sensory alteration is largely absent at common doses, though visual and auditory hallucinations have been reported, typically in the context of high doses or extended sleep deprivation.
Physical
Physical effects center on stimulation and wakefulness, accompanied by appetite suppression, sweating, jaw tension, and occasional itchiness. Disturbed sleep is common in the hours following use, and repeated use can lead to weight loss.
Uncomfortable
Cognitive
The headspace is energetic and talkative, marked by euphoria, mood lift, and enhanced sociability. As the effects wear off or with repeated use, this can give way to moodiness, irritability, and aggressiveness.
Emotional
The emotional tone is predominantly positive during the experience, with negative shifts more likely during the offset or with repeated use.
Social
Visual
Visual effects are not characteristic of ordinary use; hallucinations are associated with high doses and sleep deprivation.
Auditory
Pharmacology
Pharmacodynamics
2-FA has not been formally studied to the same extent as traditional amphetamines. Based on its structural similarity to other substituted amphetamines with comparable substitution patterns, it is thought to act primarily as a dopamine and norepinephrine releasing agent. This would involve binding to and partially blocking the transporter proteins that normally clear dopamine and norepinephrine from the synaptic cleft, allowing these neurotransmitters to accumulate to elevated levels in the brain.citation needed
Pharmacokinetics
There have been no studies on the pharmacokinetic profile of 2-FA and the metabolism of 2-FA is unknown.
Dangerous
Highest riskThese combinations are considered extremely harmful and should always be avoided. Reactions to these drugs taken in combination are highly unpredictable and have a potential to cause death.
Tolerance
Tolerance timelines are rules of thumb, not exact schedules, and vary widely between individuals and use patterns.
Dopaminergic stimulants, MDMA, because its full euphoric effect depends on dopamine and norepinephrine, 2-FMA
Harm Potential
Addiction & Dependence
Psychological
ModerateWith ongoing use, 2-FA may be moderately addictive and carries a substantial risk of abuse; some users can develop psychological dependence. Compulsive redosing has also been reported, and cravings may occur after sudden discontinuation.
Physical
LowWithdrawal effects may occur when dependence has developed and use is suddenly stopped, though specific physical withdrawal symptoms are not well characterized for this compound.
Toxicity
Acute cardiovascular stimulation including increased heart rate, elevated blood pressure, abnormal heartbeat, and vasoconstriction occurs during intoxication; long-term cardiovascular effects have not been studied in any scientific context.
Psychosis Risk
Abuse of amphetamine-class compounds at high dosages for prolonged periods can result in stimulant psychosis presenting with paranoia, hallucinations, or delusions.citation needed Reviews of amphetamine-induced psychosis indicate that approximately 5-15% of affected users may not fully recover, though antipsychotic medications are effective for acute episodes.1
Seizure Risk
Seizures are listed as a possible adverse effect, though specific incidence data for 2-FA is not available. Risk may be elevated in combination with other seizure-threshold-lowering substances.
History & Culture
2-Fluoroamphetamine emerged on the online research chemical market during the 2010s as part of a broader wave of fluorinated amphetamine derivatives. This family of compounds includes 2-FMA, 3-FA, 3-FEA, and 4-FA, which are positional isomers differing in the placement of the fluorine atom on the…
Legality
By Country
References
Source Pages
Citations
- Steven J Shoptaw, Uyen Kao, & Walter Ling. (2009). Treatment for amphetamine psychosis. https://doi.org/10.1002/14651858.cd003026.pub31
- Controlled Drugs and Substances Act, Schedule I (Amphetamines). (n.d.). https://laws-lois.justice.gc.ca/eng/acts/C-38.8/page-9.html1
- 我国管制毒品目录(2026年7月更新,540种+三大类). ga.sz.gov.cn (n.d.). https://ga.sz.gov.cn/SZJDZX/SZBMFW/content/post_12898420.html1
- 非药用类麻醉药品和精神药品列管办法. gaj.panjin.gov.cn (n.d.). https://gaj.panjin.gov.cn/2015_10/08_00/content-235605.html1
- 三部门联合发布最新版《非药用类麻醉药品和精神药品目录》. btgaj.xjbt.gov.cn (n.d.). https://btgaj.xjbt.gov.cn/c/2025-07-28/8428464.shtml1
- 关于将二氟乙咪酯等16种物质列入《非药用类麻醉药品和精神药品目录》的公告. btgaj.xjbt.gov.cn (n.d.). https://btgaj.xjbt.gov.cn/c/2026-06-23/8490261.shtml1
- 麻醉药品和精神药品管理条例(2024年12月6日修订版). xzfg.moj.gov.cn (n.d.). https://xzfg.moj.gov.cn/mobile/law/detail?LawID=17441
- 中华人民共和国禁毒法. gat.xinjiang.gov.cn (n.d.). https://gat.xinjiang.gov.cn/gat/flfg/201711/45dd941abaf044e18d80aa60bbdd9b89/files/%E4%B8%AD%E5%8D%8E%E4%BA%BA%E6%B0%91%E5%85%B1%E5%92%8C%E5%9B%BD%E7%A6%81%E6%AF%92%E6%B3%95.pdf1
- 中华人民共和国刑法. audit.gov.cn (n.d.). https://www.audit.gov.cn/n7/n34/n58/c109675/content.html1
- 北京市公安局《中华人民共和国治安管理处罚法》行政处罚裁量基准(2026版). beijing.gov.cn (n.d.). https://www.beijing.gov.cn/zhengce/zhengcefagui/202606/t20260622_4709382.html1
Further Reading
Cayman Chemical - 2-Fluoroamphetamine datasheet
Cayman Chemical – 2-Fluoroamphetamine datasheet
Discrimination of Fluoroamphetamine Regioisomers by Raman Spectroscopy (2016)
Fluoroamphetamine assay validation (J Anal Toxicol 2017)
Fluoroamphetamine assay validation (J Anal Toxicol 2017)
INCB Technical Report on illicit-lab precursors (2017)
LC-MS/MS oral-fluid method including 2-FA (Anal Chim Acta 2019)
LC–MS/MS oral-fluid method including 2-FA (Anal Chim Acta 2019)
PubChem: CID 121531
Reddit: r/researchchemicals - 2-FA is actually great (2025)
Reddit: r/researchchemicals - Recreational dose discussion (2019)
Smart - Fluorine substituent effects on bioactivity (J Fluorine Chem 2001)
Article Status
Step 1 · Automated synthesisAn autonomous workflow built by Josie Kins compiled this article's foundation from information published across the web.
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Recent changes8 human edits · latest
Times are UTCNewest first
11 August 2026
Lyrea · Updated the article
24 January 2026
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
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