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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
    • toxicity data (PsychonautWiki)
    • classified Research-chemical

    Depressant Research-chemical Benzodiazepine

    Summary dose.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 dose.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 dose.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 6-34.5 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 →

    Import into PsychonautWiki Journal

    The PsychonautWiki Journal app includes Flubromazepam, but its built-in data can be thinner than ours. Importing this file adds a separate "Flubromazepam (Substance Search)" custom substance with our dose ranges, durations and tolerance, so you can log against whichever you prefer.

    ⬇ Download import file Import this file as custom substances and you get "Flubromazepam (Substance Search)" with every route's full dose ladder and timeline, no typing. Works on iOS and Android (v15+); the format is confirmed by the app's developer.

    Ranges are harm-reduction guidance, not a prescription.

    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

    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. Tags summarise each author's own verdict — how reports are classified.

    Erowid 3 reports 1 neutral 2 cautionary visit
    Not the Sleeping Aid I Was Looking For cautionary 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 📖 dose.wiki 📖 PsychonautWiki