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4F-EPH
Dosage & Duration
Dosage
Doses are population estimates that vary widely between individuals.
Duration
Subjective Effects
Pharmacology
Tolerance
Harm Potential
Addiction & Dependence
Psychological
ModerateChronic 4F-EPH use is viewed as moderately addictive, with substantial abuse potential and a risk of psychological dependence for some users. Once addiction develops, stopping abruptly may bring on cravings and withdrawal symptoms.
Toxicity
Insufflation can cause mild to moderate damage to the nasal mucous membranes; while less caustic than ethylphenidate, repeated intranasal use without adequate recovery time will likely result in nasal cavity damage.
Vasoconstriction occurs and can become uncomfortable or hazardous as very high doses wear off, or for people who already have circulatory problems; blue or purple discoloration of extremities indicates a medical emergency.
History & Culture
Legality
By Country
References
Source Pages
Citations
- PubChem PUG REST: 4-Fluoroethylphenidate, erythro- (CID 176489840). pubchem.ncbi.nlm.nih.gov (n.d.). https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/176489840/property/IUPACName,MolecularFormula,MolecularWeight,CanonicalSMILES,InChIKey/JSON1
- Neue-psychoaktive-Stoffe-Gesetz (NpSG), Anlage 1. gesetze-im-internet.de (n.d.). https://www.gesetze-im-internet.de/npsg/anlage_1.html1
- Neue-psychoaktive-Stoffe-Gesetz (NpSG), § 2 Begriffsbestimmungen. gesetze-im-internet.de (n.d.). https://www.gesetze-im-internet.de/npsg/__2.html1
- Neue-psychoaktive-Stoffe-Gesetz (NpSG), § 3 Unerlaubter Umgang mit neuen psychoaktiven Stoffen. gesetze-im-internet.de (n.d.). https://www.gesetze-im-internet.de/npsg/__3.html1
- Neue-psychoaktive-Stoffe-Gesetz (NpSG), § 4 Strafvorschriften. gesetze-im-internet.de (n.d.). https://www.gesetze-im-internet.de/npsg/__4.html1
- Neue-psychoaktive-Stoffe-Gesetz (NpSG), current consolidated text. gesetze-im-internet.de (n.d.). https://www.gesetze-im-internet.de/npsg/BJNR261510016.html1
- Deutscher Bundestag Drucksache 18/8579: Entwurf eines Gesetzes zur Bekämpfung der Verbreitung neuer psychoaktiver Stoffe. dserver.bundestag.de (n.d.). https://dserver.bundestag.de/btd/18/085/1808579.pdf1
- Betäubungsmittelverzeichnisverordnung (BetmVV-EDI), Stand am 13. März 2026, Anhang 6, Verzeichnis e. fedlex.data.admin.ch (n.d.). https://fedlex.data.admin.ch/filestore/fedlex.data.admin.ch/eli/cc/2011/363/20260313/de/html/fedlex-data-admin-ch-eli-cc-2011-363-20260313-de-html-3.html1
- Änderung der Betäubungsmittelverzeichnisverordnung vom 2. Februar 2018 (AS 2018 949). fedlex.admin.ch (n.d.). https://www.fedlex.admin.ch/filestore/fedlex.data.admin.ch/eli/oc/2018/132/de/pdf-a/fedlex-data-admin-ch-eli-oc-2018-132-de-pdf-a.pdf1
- Verordnung über die Betäubungsmittelkontrolle (BetmKV), Stand am 23. Januar 2023. fedlex.admin.ch (n.d.). https://www.fedlex.admin.ch/filestore/fedlex.data.admin.ch/eli/cc/2011/362/20230123/de/html/fedlex-data-admin-ch-eli-cc-2011-362-20230123-de-html-3.html1
Further Reading
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
Times are UTCNewest first
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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