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    NEP molecular structure

    NEP Stats & Data

    Α-eapp Ethyl-pentedrone N-ethylpentedrone N-ethylnorpentedrone Α-ethylaminopentiophenone
    NPS DataHub
    MW205.3
    FormulaC13H19NO
    CAS779974-89-9
    IUPAC2-ethylamino-1-phenylpentan-1-one
    SMILESCCCC(NCC)C(=O)c1ccccc1
    InChIKeyQQAHEGDXEXIQPR-UHFFFAOYSA-N
    Phenethylamines; Cathinones; 2020/1. Von 2-Phenethylamin abgeleitete Verbindungen; 2021/1. Von 2-Phenethylamin abgeleitete Verbindungen; 2022/1. Von 2-Phenethylamin abgeleitete Verbindungen
    Chemical Class Cathinone
    Psychoactive Class Stimulant / Entactogen
    Half-Life In‑vitro human liver microsomes t½ ≈ 770 min (~12.8 h); in‑vivo human half‑life unknown.

    Receptor Profile

    Receptor Actions

    Inhibitors
    Serotonin-norepinephrine-dopamine reuptake inhibitor (SNDRI) (poor serotonin affinity)
    Dopamine-norepinephrine reuptake inhibitor (NDRI) (primary)

    Receptor Binding

    dopamine reuptake inhibitor

    History & Culture

    N-Ethylpentedrone emerged on the online research chemical market during the mid-2010s, with documented user experience reports beginning to appear around 2016. The compound represents a generation of synthetic cathinone derivatives developed as functional and structural alternatives to earlier stimulants in this chemical class. These substances, including NEP, are sometimes colloquially grouped under the imprecise umbrella term "bath salts," a label that emerged from early marketing strategies used to circumvent drug scheduling laws. By 2020, NEP had established itself as a relatively popular option within research chemical communities, likely due to its availability and effects profile. Its development and distribution follow the pattern typical of novel psychoactive substances: synthesized to provide effects similar to controlled predecessors while initially existing in legal grey areas before eventually being scheduled in various jurisdictions.

    Effect Profile

    Curated + 6 Reports
    Empathogen 5.4

    Strong sensory enhancement with moderate stimulation and euphoria, low empathy

    Empathy / Social Openness×3
    3
    Euphoria / Mood Elevation×2
    6
    Stimulation×1
    7
    Sensory Enhancement×1
    10
    Stimulant 5.9

    Strong anxiety/jitters and focus with moderate euphoria, mild stimulation

    Stimulation / Energy×3
    5
    Euphoria / Mood Lift×2
    7
    Focus / Productivity×2
    9
    Anxiety / Jitters×1
    10

    Tolerance & Pharmacokinetics

    drugs.wiki
    Half-Life
    In‑vitro human liver microsomes t½ ≈ 770 min (~12.8 h); in‑vivo human half‑life unknown.
    Addiction Potential
    Moderate to high; compulsive redosing and binge patterns are commonly reported with cathinones and specifically with NEP by user communities and harm‑reduction services.

    Cross-Tolerances

    Other synthetic cathinones
    60% ●○○
    Amphetamine‑type stimulants
    40% ●○○

    Experience Report Analysis

    Erowid
    6 Reports
    2016–2021 Date Range
    6 With Age Data
    5 Effects Detected

    Demographics

    Gender Distribution

    Age Distribution

    Reports Over Time

    Effect Analysis

    Erowid

    Effects aggregated from 6 experience reports (6 Erowid)

    6 Reports
    5 Effects Detected
    4 Positive
    1 Adverse
    0 Neutral

    Effect Sentiment Distribution

    Confidence Distribution

    Positive Effects 4

    Music Enhancement 66.7% 70%
    Focus Enhancement 66.7% 70%
    Stimulation 66.7% 70%
    Euphoria 50.0% 70%

    Adverse Effects 1

    Anxiety 66.7% 70%

    Real-World Dose Distribution

    62K Doses

    From 22 individual dose entries

    Insufflated (n=17)

    Median: 20.0mg 25th: 15.0mg 75th: 22.0mg 90th: 27.0mg
    mg/kg median: 0.188 mg/kg 75th: 0.255

    Form / Preparation

    Most common forms and preparations reported

    Legal Status

    Country Status Notes
    Australia Schedule 9 Prohibited substance under a cathinone blanket ban provision. As a Schedule 9 substance, no therapeutic use is recognized and possession, production, and distribution are illegal.
    Brazil Controlled All cathinone analogues became controlled substances on September 7, 2018, through a blanket ban appended to Portaria SVS/MS nº 344. Possession, use, and distribution are illegal.
    Canada Not explicitly scheduled While not individually listed, NEP may be treated as a Schedule I substance under the Controlled Drugs and Substances Act due to provisions banning derivatives of amphetamine.
    China Controlled Listed as a controlled substance under national drug legislation. Production, distribution, and possession without authorization are prohibited.
    France Stupéfiant Classified as a narcotic substance (stupéfiant) as a derivative of cathinone with alkyl substitutions on the nitrogen and R2 position. Possession, purchase, sale, and manufacture are illegal.
    Germany NpSG controlled Controlled under the Neue-psychoaktive-Stoffe-Gesetz (New Psychoactive Substances Act) since November 26, 2016. Production and importation for market distribution, administration to others, and trading are punishable offenses. Possession is illegal but not subject to criminal penalties.
    Italy Table 1 Added to Table 1 of psychotropic substances on December 29, 2020. As a Table 1 substance, it is subject to the strictest controls under Italian drug legislation.
    Japan Controlled Designated as a controlled substance under national drug control legislation. Possession, distribution, and manufacturing are prohibited.
    Netherlands Legal Currently unscheduled and legal to possess. However, it belongs to a substance group that may become prohibited under recently enacted New Psychoactive Substances (NPS) legislation.
    Sweden Controlled Classified as a controlled substance since November 12, 2019. Subject to Swedish narcotics legislation with penalties for possession, distribution, and manufacturing.
    Switzerland Controlled (Verzeichnis E) Regulated as a defined derivative of cathinone under Verzeichnis E point 1 of the narcotics legislation. An exception exists for scientific or industrial purposes, which remain legal with appropriate authorization.
    United Kingdom Class B Controlled as a Class B substance under the Misuse of Drugs Act 1971 through a cathinone catch-all clause. Possession carries penalties of up to five years imprisonment, while supply offenses carry up to fourteen years.
    United States Not scheduled Not federally scheduled under the Controlled Substances Act. However, possession or distribution intended for human consumption could potentially be prosecuted under the Federal Analogue Act due to structural and pharmacological similarities to pentedrone, which is a Schedule I controlled substance.

    Harm Reduction

    drugs.wiki

    Why this matters and how to reduce risk: 1) Human in‑vivo pharmacokinetics are unknown; an in‑vitro study in human liver microsomes found a long metabolic half‑life (~770 min ≈ 12.8 h), so redosing can stack and prolong sympathomimetic strain even if the subjective ‘rush’ fades. Space doses and avoid consecutive‑day use. 2) Mislabeling is common: multiple Swiss drug‑checking alerts found NEP sold as 3‑MMC; because NEP is active at much lower oral doses (≈20–50 mg vs 100–200 mg for 3‑MMC), substitution markedly increases overdose risk. Use accredited drug‑checking when possible; if not, start with a very small test dose and wait fully for effects. 3) Cardiovascular and hyperthermia risks are central with cathinones; clinical cases with NEP have included severe agitation, fever, rhabdomyolysis and acute kidney injury. Avoid hot environments and intense exertion; take cooling breaks; sip isotonic fluids (not excessive water) and replace electrolytes during prolonged activity. 4) Seizure risk is heightened by co‑factors (sleep deprivation, dehydration, tramadol, bupropion, stimulant stacking). Avoid these combinations and ensure sleep/nutrition before and after sessions. 5) Intranasal dosing produces a steeper rise, more peripheral side effects and greater compulsion than oral; vaporizing/inhalation reports often describe very short cycles with strong urges to redose and respiratory irritation—prefer oral if you choose to use at all. 6) Set maximum session amounts in advance, measure doses with a 0.001 g scale, and avoid ‘chasing’ diminishing returns—compulsion is a common pathway to harm. 7) Because NEP is frequently mis‑sold, reagents may not reliably distinguish it from other cathinones; lab drug‑checking (FTIR/GC‑MS/LC‑HRMS) is the safest way to identify contents. 8) Aftercare: expect a dysphoric ‘crash’; plan nutrition, hydration and sleep; consider a non‑sedating day off stimulants for at least 14+ days to let tolerance and cardiovascular strain normalize. 9) Seek urgent care for red‑flag symptoms: persistent chest pain, severe headache, confusion/delirium, temperature >38.5°C (101.3°F), rigid muscles, dark urine, or inability to keep fluids down.

    References

    Drugs.wiki References

    • NEP metabolic stability and metabolites (human liver microsomes)
    • Cathinone intoxications—clinical risks (review, includes NEP concentration data)
    • NEP emergency case with severe agitation, fever, rhabdomyolysis and AKI (Belgium)
    • SaferParty—NEP sold as 3‑MMC (2024 warning)
    • SaferParty—NEP sold as 3‑MMC (2024 Luzern alert; 98% NEP)
    • SaferParty—Blog: mislabelled 3‑MMC/4‑MMC often contains NEP; dose differences highlighted (2025)
    • TripSit—Drug combinations (stimulants with MAOIs, tramadol, cocaine/others)
    • StatPearls—Sympathomimetic toxicity (assessment and complications)
    • Bupropion—seizure risk and contraindications (StatPearls)
    • DXM—serotonin syndrome case series (risk with serotonergic co‑use)
    • EUDA European Drug Report 2025—cathinone harms and deaths in EU
    • Bluelight—NEP megathread (nomenclature, user patterns)
    • Reddit—NEP experience report (vaping/insufflation, compulsion, cough)
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