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    4F-MABP molecular structure

    4F-MABP Stats & Data

    4-fbp Para-fluorobuphedrone
    Chemical Class Cathinone
    Psychoactive Class Stimulant
    Half-Life Estimated 2 – 4 h (no human PK data; inferred from structural analogues)

    Effect Profile

    Curated
    Stimulant 4.1

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

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

    Tolerance & Pharmacokinetics

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    Half-Life
    Estimated 2 – 4 h (no human PK data; inferred from structural analogues)
    Addiction Potential
    Moderate–high. Like other dopaminergic cathinones it produces strong reinforcement and compulsive redosing; repeated binges have led to dependence in case reports.

    Tolerance Decay

    Full tolerance 2d Half tolerance 7d Baseline ~14d

    Anecdotal stimulant patterns suggest rapid tolerance accrual over 1–3 days with partial reversal over 1–2 weeks of abstinence. Avoid back‑to‑back days; schedule at least 7–14 days between sessions to reduce escalation and comedown severity.

    Cross-Tolerances

    other cathinones (mephedrone, flephedrone, buphedrone)
    70% ●○○
    amphetamine‑type stimulants
    40% ●○○

    Harm Reduction

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    4F‑MABP is a little‑studied fluorinated analogue of buphedrone first identified on the European NPS market in the mid‑2010s. Animal and seizure analyses on related cathinones indicate prevalent dopamine/norepinephrine transporter inhibition; potency and human pharmacodynamics for this exact compound remain uncertain—hence conservative dosing and slow titration are prudent. Synthetic cathinones frequently present with tachycardia, hypertension and peripheral vasoconstriction; people with cardiovascular disease, hypertension, or Raynaud‑like symptoms should avoid use. Hyperthermia can occur with stimulants in hot venues; balance fluids and electrolytes—avoid both dehydration and overhydration to reduce hyponatremia risk. Strong urges to redose and sleep loss can amplify anxiety or precipitate brief psychotic features; plan hard stops, secure sleep and recovery time, and avoid multiday runs. Intranasal use increases local harm (epistaxis, irritation) and infection risk; use sterile implements and saline care. Do not inject: cathinones are associated with acidic solutions, vasoconstriction and tissue injury, sharply increasing complication rates if injected. Avoid combinations that raise serotonin (e.g., MDMA) or lower seizure threshold (e.g., tramadol, bupropion). Always test material—multi‑reagent kits (e.g., Marquis, Froehde, Simon’s, Zimmermann, Morris) can help differentiate cathinone classes, but do not quantify potency.

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