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    5-EAPB molecular structure

    5-EAPB Stats & Data

    5eapb
    NPS DataHub
    MW239.74
    FormulaC13H18ClNO
    CAS1823776-22-2
    IUPAC(2~{R})-1-(1-benzofuran-5-yl)-~{N}-ethylpropan-2-amine
    SMILES[Cl-].CCNC(C)Cc1ccc2occc2c1.[H+]
    InChIKeyYJEXOIDIYJUVNS-UHFFFAOYSA-N
    Phenethylamines; Arylalkylamines; 2020/1. Von 2-Phenethylamin abgeleitete Verbindungen; 2021/1. Von 2-Phenethylamin abgeleitete Verbindungen; 2022/1. Von 2-Phenethylamin abgeleitete Verbindungen
    Psychoactive Class Psychedelic / Stimulant
    Half-Life Unknown in humans. Based on related benzofurans, effects can persist for hours and after‑effects may extend into the next day; no peer‑reviewed human PK identified.

    Receptor Profile

    Receptor Actions

    Agonists
    5-HT2A receptor agonist (partial)
    5-HT2B receptor agonist
    Other
    Serotonin-dopamine-norepinephrine releasing agent (SNDRA)

    Effect Profile

    Curated + 2 Reports
    Psychedelic 3.2

    Strong auditory effects with moderate body load, mild visuals, low headspace

    Visual Intensity×3
    4
    Headspace Depth×3
    1
    Auditory Effects×1
    8
    Body Load / Somatic Effects×1
    7
    Empathogen 6.1

    Strong euphoria with moderate sensory enhancement, mild empathy and stimulation

    Empathy / Social Openness×3
    5
    Euphoria / Mood Elevation×2
    8
    Stimulation×1
    5
    Sensory Enhancement×1
    7
    Stimulant 3.2

    Strong anxiety/jitters and euphoria with low stimulation

    Stimulation / Energy×3
    3
    Euphoria / Mood Lift×2
    8
    Focus / Productivity×2
    0
    Anxiety / Jitters×1
    9

    Tolerance & Pharmacokinetics

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    Half-Life
    Unknown in humans. Based on related benzofurans, effects can persist for hours and after‑effects may extend into the next day; no peer‑reviewed human PK identified.
    Addiction Potential
    Low‑to‑moderate. Human compulsive use appears uncommon, but pharmacology indicates significant monoaminergic activity and abuse liability, so spacing and conservative dosing are prudent.

    Tolerance Decay

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

    Tolerance data for 5‑EAPB is not formally studied; model reflects community practice with MDMA‑like releasers: marked acute tolerance after one strong session, partial recovery after ~1–2 weeks, closer to baseline by ~4–6 weeks. Confidence low; individual variability high.

    Cross-Tolerances

    MDMA
    60% ●○○
    5‑APB/6‑APB
    70% ●○○
    Other serotonin releasers
    50% ●○○

    Experience Report Analysis

    Erowid
    2 Reports
    2017–2019 Date Range
    2 With Age Data

    Demographics

    Gender Distribution

    Age Distribution

    Reports Over Time

    Legal Status

    Country Status Notes
    Singapore 5-EAPB is listed in the Fifth Schedule of the Misuse of Drugs Act (MDA) and therefore illegal in Singapore as of May 2015.
    United Kingdom In the UK, all benzofurans are considered Class B drugs and are therefore illegal.

    Harm Reduction

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    Evidence‑informed harm‑reduction points and caveats:

    • 5‑HT2B agonism in vitro has been demonstrated within the benzofuran class, including 5‑EAPB, implying a theoretical risk of valvular heart disease with frequent or high cumulative exposure; space use widely and avoid regular weekly/monthly use.

    • Combining with MAOIs, DXM, tramadol, or other serotonergic drugs increases serotonin syndrome risk; avoid these combinations and be alert to symptoms (agitation, clonus, hyperthermia). Reference interaction charts and clinical case overviews.

    • Overheating and over‑hydration are both documented risks with MDMA‑like stimulants: take cooling breaks, don’t over‑exert, sip ~250–500 mL fluids per hour in hot/dancing conditions, and include electrolytes to reduce hyponatremia risk.

    • Identity verification: reagent tests for 5‑EAPB can mimic MDMA/5‑APB/6‑APB reactions (dark/black on Marquis/Mecke). Lab testing is preferable where available; recent market reports show frequent 5‑APB / 6‑APB mislabeling.

    • Dose conservatively and account for salt form; many samples are HCl. Avoid stacking redoses—subjective returns diminish while adverse effects accumulate. Reference doses are from user communities and should not be treated as guaranteed safe.

    • Insufflation tends to increase acute side‑effects (irritation, tachycardia) and shorten duration; oral routes are generally more predictable based on community data.

    • Serious toxicities and at least one suspected death have been flagged by European early‑warning networks for closely related benzofurans, including alerts naming 5‑EAPB; ultra‑high doses (hundreds of mg) are dangerous.

    • Spacing: as with MDMA‑like releasers, allow several weeks between sessions to reduce tolerance and mood disturbances; frequent use is associated with prolonged insomnia and mood dips in reports.

    References

    Data Sources

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