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4-EMC
4-Ethylmethcathinone
4-EMC is a synthetic stimulant and entactogen of the substituted cathinone class.citation needed It is a structural isomer of both 4-MEC and 3,4-DMMC. Initially identified in Europe, it has since been detected in numerous countries worldwide, first appearing in Australia in 2020. As a designer drug with limited research history, there is minimal documentation regarding its safety profile and long-term effects, and it is considered habit-forming.
Dosage & Duration
Dosage
Doses are population estimates that vary widely between individuals.
Threshold~50 mg
Light50-100 mg
Moderate100-150 mg
Strong150-200 mg
Heavy200+ mg
Duration
Onset20-60 minutes
After Effects2-8 hours
Total3-5 hours
Subjective Effects
Legacy content. A statistically backed ontology from Mindstate Design Labs is coming soon.
The experience is that of a euphoric, socially disinhibiting stimulant, with users reporting mood lift, increased energy and alertness, heightened sociability, and increased libido. Consistent with other substituted cathinones, the effects center on stimulation and emotional elevation rather than pronounced sensory alteration, although visual and auditory hallucinations have been reported. Less pleasant emotional shifts such as moodiness and aggressiveness can also occur, particularly as the experience wears on.
Physical
The body load is stimulating, with increased energy, decreased need for sleep, appetite suppression, sweating, and teeth grinding. Disturbed sleep patterns and itchiness are also reported.
Stimulation
Uncomfortable
Cognitive
The headspace is euphoric, talkative, and socially engaged, with a pronounced mood lift and increased desire to interact with others. This can shift into moodiness or aggressiveness in some users.
Emotional
Social
Visual
Auditory
Pharmacology
Pharmacodynamics
In HEK293 cells expressing human monoamine transporters, 4-EMC inhibited norepinephrine, serotonin, and dopamine uptake with IC50 values of 2.5 µM (95% CI 1.7–3.7), 4.3 µM (3.2–5.9), and 31 µM (13–72), respectively. In this assay it was more potent at NET and SERT than at DAT.1
4-EMC also induced norepinephrine and dopamine efflux and produced serotonin release through SERT, described as similar to MDMA in the same cell system. These in-vitro results do not establish human potency, dose, safety, metabolism, or pharmacokinetics.1
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 not written up yet
Harm Potential
Addiction & Dependence
Psychological
Classified as habit-forming. As a cathinone stimulant producing euphoria and mood lift, it carries potential for psychological dependence, though specific data on addiction rates is not available.
Psychosis Risk
Visual and auditory hallucinations are listed among possible effects, suggesting potential for perceptual disturbances, though specific psychosis risk data is not available.
History & Culture
4-Ethylmethcathinone (4-EMC) is a synthetic cathinone that emerged as part of the broader wave of designer stimulants developed as alternatives to controlled substances. As a structural isomer of 4-MEC and 3,4-DMMC,citation needed it represents one of many positional variations explored within…
Legality
By Country
Illegal5
United StatesIllegal21 CFR § 1308.11(d)(59) (Schedule I hallucinogenic-substances entry for 4-methyl-N-ethylcathinone (4-MEC), including positional isomers); DEA final rule, Schedules of Controlled Substances: Placement of 10 Synthetic Cathinones Into Schedule I, 82 FR 12171 (effective March 1, 2017); 21 U.S.C. §§ 802(14), 802(32), 812(c), and 813.78910111213
The direct federal Schedule I basis is the isomer-inclusive 21 CFR § 1308.11(d) entry for 4-MEC, reinforced by the 2017 final rule and the DEA August 2026 Orange Book's explicit identification of 4-EMC as a positional isomer under code 1249. The Controlled Substance Analogue Act framework is separate and conditional and does not replace the direct listing. 4-EMC (4-ethylmethcathinone) is expressly identified by the DEA as a positional isomer of 4-methyl-N-ethylcathinone (4-MEC), DEA drug code 1249. The 4-MEC entry is Schedule I, and the Schedule I regulation's hallucinogenic-substances lead-in expressly includes positional isomers. 4-EMC is therefore directly covered as a Schedule I substance; its status does not depend on a separate Controlled Substance Analogue Act determination.
GermanyIllegalBetäubungsmittelgesetz (BtMG), Anlage I2
Germany expressly lists 4-Ethylmethcathinon (4-EMC) in Anlage I of the BtMG, with the chemical name 1-(4-Ethylphenyl)-2-(methylamino)propan-1-on. Anlage I covers non-marketable narcotics, so 4-EMC is prohibited rather than prescription-available. This is a distinct entry from 4-Methylethcathinon (4-MEC).
NorwayIllegalForskrift om narkotika (FOR-2013-02-14-199) § 53
4-EMC is listed in the current Norwegian narcotics regulation as 4-etylmetkatinon. Section 5 prohibits possession or use of narcotics without lawful authority.
SwedenIllegalFörordning (1992:1554) om kontroll av narkotika, bilaga 14
4-EMC is listed as a narcotic substance in Annex 1 to the Swedish Ordinance on Control of Narcotics. The listing identifies it as 1-(4-etylfenyl)-2-(metylamino)propan-1-on (4-EMC), distinct from the separately listed 4-MEC.
United KingdomIllegal (analog/blanket ban)Misuse of Drugs Act 1971, Schedule 2, Part II, paragraph 1(aa); Misuse of Drugs Regulations 2001, Schedule 1, paragraph 1(m)56
4-EMC (4-ethylmethcathinone) is covered as a Class B controlled drug by the Act's generic cathinone definition. Its para-ethyl phenyl substitution and N-methyl substitution fall within that definition; this applies to 4-EMC, not 4-MEC. The Regulations place the corresponding generic cathinone group in Schedule 1.
References
Source Pages
Citations
- Rickli A, Hoener MC, & Liechti ME. (March 2015). Monoamine transporter and receptor interaction profiles of novel psychoactive substances: para-halogenated amphetamines and pyrovalerone cathinones. European Neuropsychopharmacology, 25(3), 365–76. https://doi.org/10.1016/j.euroneuro.2014.12.01212
- Anlage I BtMG. gesetze-im-internet.de (n.d.). https://www.gesetze-im-internet.de/btmg_1981/anlage_i.html1
- Forskrift om narkotika (FOR-2013-02-14-199) § 5. lovdata.no (n.d.). https://lovdata.no/dokument/SF/forskrift/2013-02-14-1991
- Förordning (1992:1554) om kontroll av narkotika, bilaga 1. riksdagen.se (n.d.). https://www.riksdagen.se/sv/dokument-och-lagar/dokument/svensk-forfattningssamling/forordning-19921554-om-kontroll-av-narkotika_sfs-1992-1554/1
- Misuse of Drugs Act 1971, Schedule 2. legislation.gov.uk (n.d.). https://www.legislation.gov.uk/ukpga/1971/38/schedule/21
- Misuse of Drugs Regulations 2001, Schedule 1. legislation.gov.uk (n.d.). https://www.legislation.gov.uk/uksi/2001/3998/schedule/11
- DEA Diversion Control Division, Lists of Scheduling Actions, Controlled Substances, and Regulated Chemicals (August 2026 Orange Book). deadiversion.usdoj.gov (n.d.). https://deadiversion.usdoj.gov/schedules/orangebook/orangebook.pdf1
- 21 CFR Part 1308, official eCFR Versioner XML dated August 25, 2026. ecfr.gov (n.d.). https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml?part=13081
- Federal Register document page, 82 FR 12171, Schedules of Controlled Substances: Placement of 10 Synthetic Cathinones Into Schedule I. federalregister.gov (n.d.). https://www.federalregister.gov/documents/2017/03/01/2017-03974/schedules-of-controlled-substances-placement-of-10-synthetic-cathinones-into-schedule-i1
- Federal Register full text, 2017-03974. federalregister.gov (n.d.). https://www.federalregister.gov/documents/full_text/text/2017/03/01/2017-03974.txt1
Further Reading
Drugs-Forum: 4-EMC Experience Reports
EMCDDA: Europol Joint Report on 4-EMC (2014)
Neuropharmacology of Synthetic Cathinones - Baumann et al. (2018)- Prosser & Nelson: The Pharmacology of Synthetic Cathinones, Critical Reviews in Toxicology (2012)
Reddit: r/ResearchChemicals - 4-EMC Discussion (2020)- Sommers et al.: Identification and Characterization of Novel Cathinones, Forensic Science International (2016)
Article Status
Step 1 · Automated synthesisAn autonomous workflow built by Josie Kins compiled this article's foundation from information published across the web.
- Step 2 · First-pass reviewPending
Not yet reviewed — this article is pending editorial review by Lyrea.
- Step 3 · Citation reviewPending
No one has reviewed this article's citations yet. That second pass checks each claim against the source it cites.
Recent changes7 human edits · latest
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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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