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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 Well-documented
    Well-documented
    Multiple authoritative sources agree on dosing and effects.
    • 4 corroborating sources
    • 1 ROA with full dose ladder
    • duration data present
    • 17 combo interactions documented
    • PubChem toxicity data
    • classified Research-chemical

    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 hrs 6-12 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

    Cross-Check Flubromazepam with another substance

    Community Trip Reports

    Anecdotal first-person accounts from Reddit, Erowid, and Bluelight. Click a source to expand. Reports are harm-reduction context, not medical guidance.

    Erowid 3 reports 2 neutral 1 cautionary visit
    Not the Sleeping Aid I Was Looking For neutral exp #116608

    Obtained from a vendor that has thus far delivered what's on the label, at least to my knowledge. Was in "pallet" [pellet?] form, each (according to vendor) containing 8mg of flubromazepam. Record was kept by starting a timer on my phone when I took the drug, then referencing it before taking any notes.

    QwalVis · 8 mg oral / 4 mg oral / 4 mg oral
    Wife Found Me Naked Passed Out neutral exp #104627

    [Erowid Note: The dose described in this report is very high, potentially beyond Erowid's 'heavy' range, and could pose serious health risks or result in unwanted, extreme effects.

    d · repeated oral
    I Can Tell It's a Phenazepam Analogue cautionary exp #114013

    I used this pretty heavily during university, in the form of those orange 4mg "pellets", when my depression and anxiety remained undiagnosed and untreated. It was, in retrospect, a horrible choice for self-medication.

    flublackoutzepam
    Flubromazepam's nerd page Pharmacology, chemical data, effect profiles, and more
    →

    Helpful Links

    📘 Experience Reports 📖 TheDrug.Wiki 📖 PsychonautWiki