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    Disclaimer
    🧪 This is a research chemical with limited data on its long-term health effects, toxicity profile, and safe dosage ranges.
    ⚠ Benzodiazepines can cause physical dependence with regular use. Withdrawal can be life-threatening. Never combine with opioids or alcohol.

    Flubromazepam

    Depressant Research-chemical Benzodiazepine

    Summary TheDrug.Wiki TripSit PsychonautWiki

    Flubromazepam is an extremely long-acting designer benzodiazepine with effects lasting 18-72 hours depending on dose. First synthesized in 1960 but never marketed medically. The delayed onset (up to 3 hours) and extended duration make overdose common, as users may redose before initial dose takes full effect.

    Dose Information TheDrug.Wiki TripSit PsychonautWiki

    ROA Light Common Strong Heavy
    Oral 3-5mg 5-8mg 8-12mg 12mg+
    Light Common Strong Heavy

    Benzo Equivalence Calculator

    mg
    8.0 mg Flubromazepam
    =
    — mg Diazepam

    ⚠ These are approximate equivalences for educational and cross-tapering reference. Individual response, tolerance, and half-life differences mean actual equivalence varies. Always consult a healthcare provider for tapering guidance.

    Onset, Duration & After-effects TheDrug.Wiki TripSit PsychonautWiki

    ROA Onset Comeup Peak Offset After Effects Total
    Oral 20-90 min 1-3 hrs 2-6 hrs 12-24 hrs 72-72 hrs 15.3-34.5 hrs

    Effect Profile

    4 reports

    Scores (1–10) curated from multiple sources:

    • Effect keyword matching from PsychonautWiki catalog
    • Weighted by importance: core (×3), major (×2), minor (×1)

    Full methodology

    Benzodiazepine 7.1
    Strong+ 7/10

    Strong anxiolysis, cognitive impairment, and euphoria with mild sedation

    Anxiolysis ×3
    10
    anxiety suppression anxiolytic muscle relaxation muscle relaxant emotion suppression
    Sedation / Relaxation ×2
    5
    sedation muscle relaxation
    ⚠ Motor / Cognitive Impairment ×1
    10
    motor control loss memory suppression amnesia delusions of sobriety double vision
    Euphoria / Mood Lift ×1
    10
    cognitive euphoria physical euphoria disinhibition
    Based on reports from:
    Erowid Experience Reports PsychonautWiki Flubromazepam
    View methodology →

    Tolerance

    Build-up develops over 1–4 weeks of daily use; hypnotic tolerance faster than anxiolytic tolerance
    Reset weeks to months depending on half-life and duration of use; taper recommended

    Tolerance Decay

    Full tolerance 14d Half tolerance 14d Baseline ~28d

    Rapid functional tolerance develops with repeated use, as with other GABA-A positive allosteric modulators; recovery is slow. Model parameters are approximate and intended for harm-reduction planning (spacing doses by several days); individual variability is high. Data quality largely anecdotal.

    Cross-Tolerances

    Other benzodiazepines
    80%
    Z-drugs (zolpidem, zopiclone)
    40%
    Alcohol (GABAergic effects)
    30%

    Effects Erowid

    Aggregated from 4 Erowid experience reports

    Positive Effects 1

    Euphoria 75.0% 70%

    Adverse Effects 1

    Memory Suppression 75.0% 70%

    Combinations TripSit

    Flubromazepam's nerd page Pharmacology, chemical data, effect profiles, and more
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    Helpful Links

    📘 Experience Reports 📖 TheDrug.Wiki 📖 PsychonautWiki