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    4-MEC molecular structure

    4-MEC Stats & Data

    Nrg-2 4-methylethcathinone 4mec
    NPS DataHub
    MW227.73
    FormulaC12H18ClNO
    CAS1266688-86-1
    IUPAC(RS)-2-ethylamino-1-(4-methylphenyl)propan-1-one
    SMILES[Cl-].CCNC(C)C(=O)c1ccc(C)cc1.[H+]
    InChIKeyRQTXXFLUWZXGIE-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
    Half-Life Unknown

    Receptor Profile

    Receptor Actions

    Inhibitors
    Dopamine reuptake inhibitor (DAT blocker)
    Other
    Serotonin releasing agent (SERT substrate)

    History & Culture

    4-MEC has been marketed commercially under the name "NRG-2," sold either as a standalone product or in mixtures containing other substituted cathinones. The compound has also been identified as an active ingredient in counterfeit ecstasy tablets, with reports from countries including New Zealand documenting its use as a substitute for MDMA in illicit pill markets.

    Effect Profile

    Curated + 22 Reports
    Empathogen 9.6

    Strong euphoria, stimulation, sensory enhancement, and empathy

    Empathy / Social Openness×3
    96.4
    Euphoria / Mood Elevation×2
    1010
    Stimulation×1
    1010
    Sensory Enhancement×1
    1010
    Catalog Erowid
    Stimulant 6.8

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

    Stimulation / Energy×3
    810
    Euphoria / Mood Lift×2
    1010
    Focus / Productivity×2
    54.5
    Anxiety / Jitters×1
    1010
    Catalog Erowid

    Tolerance & Pharmacokinetics

    drugs.wiki
    Half-Life
    Unknown
    Addiction Potential
    Moderate; strong redose compulsion and binge risk reported.

    Tolerance Decay

    Full tolerance 1d Half tolerance 7d Baseline ~21d

    Acute tolerance within a session is common; users report markedly diminished returns after initial doses and stronger comedowns with binges. Conservative spacing (≥2 weeks) is commonly advised in HR communities to limit cumulative harms; empirical pharmacodynamic tolerance half-life is not well established.

    Cross-Tolerances

    Other cathinones (e.g., 3‑MMC, 4‑MMC)
    60% ●○○
    MDMA
    40% ●○○

    Experience Report Analysis

    Erowid
    22 Reports
    2011–2013 Date Range
    22 With Age Data
    19 Effects Detected

    Demographics

    Gender Distribution

    Age Distribution

    Reports Over Time

    Effect Analysis

    Erowid

    Effects aggregated from 22 experience reports (22 Erowid)

    22 Reports
    19 Effects Detected
    8 Positive
    8 Adverse
    3 Neutral

    Effect Sentiment Distribution

    Confidence Distribution

    Positive Effects 8

    Euphoria 81.8% 70%
    Stimulation 72.7% 70%
    Music Enhancement 50.0% 70%
    Tactile Enhancement 40.9% 70%
    Empathy 31.8% 70%
    Focus Enhancement 22.7% 70%
    Color Enhancement 18.2% 70%
    Introspection 18.2% 70%

    Adverse Effects 8

    Nausea 40.9% 70%
    Anxiety 36.4% 70%
    Increased Heart Rate 31.8% 70%
    Sweating 27.3% 70%
    Headache 22.7% 70%
    Pupil Dilation 22.7% 70%
    Jaw Clenching 13.6% 70%
    Confusion 13.6% 70%

    Real-World Dose Distribution

    62K Doses

    From 49 individual dose entries

    Insufflated (n=29)

    Median: 50.0mg 25th: 35.0mg 75th: 60.0mg 90th: 134.0mg
    mg/kg median: 0.745 mg/kg 75th: 1.043

    Oral (n=8)

    Median: 127.0mg 25th: 97.5mg 75th: 150.0mg 90th: 165.0mg
    mg/kg median: 1.417 mg/kg 75th: 1.667

    Form / Preparation

    Most common forms and preparations reported

    Body-Weight Dosing

    Dose relative to body weight from reports with weight data

    Median: 0.817 mg/kg IQR: 0.735–2.047 mg/kg n=8

    Redose Patterns

    Redosing behavior across 16 reports

    62.5% Redosed
    2.8 Avg Doses
    60m Median Interval

    Legal Status

    Country Status Notes
    United States Schedule I Classified as a Schedule I controlled substance under the Controlled Substances Act, indicating high abuse potential with no currently accepted medical use in treatment.

    Harm Reduction

    drugs.wiki

    4‑MEC is a synthetic cathinone with a short human use history; availability often followed mephedrone controls and products may be mislabelled or adulterated (e.g., sold as 3‑MMC or even ketamine), so test before use and titrate cautiously. 4‑MEC likely acts as a mixed monoamine stimulant/entactogen; as with serotonergic cathinones like 4‑MMC, combining with MAOIs or serotonergic agents (SSRIs/SNRIs, tramadol, DXM) increases risk of serotonin toxicity and should be avoided. Stimulant risks include tachycardia, hypertension, hyperthermia, vasoconstriction, bruxism, and insomnia; risk rises with dose and rapid redosing. Insufflation causes local irritation and, with repetition, can damage nasal mucosa; use your own clean utensil, saline rinse, switch nostrils, and rest the nose. Injecting cathinones adds significant harm (vein and tissue injury, infection) and can encourage compulsive redosing; if someone proceeds despite risks, sterile technique (new syringe, sterile water, filtration, site prep) reduces—but does not remove—harms. Redose compulsion (“fiending”) is frequently reported; spacing use (e.g., multiple weeks) reduces neuro/psychological stress and helps sleep and nutrition recover. The same name (‘4‑MEC’) has appeared in branded blends (e.g., ‘NRG‑2’) and non-analysed powders; do not assume purity or identity without drug checking. Formal pharmacokinetics (e.g., half-life) in humans remain poorly defined; expect variability across batches and individuals. Compared with 4‑MMC, 4‑MEC is often described as less potent and somewhat more sedating by users, but objective potency and toxicity data are limited—dose conservatively.

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