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    Disclaimer
    ☢ This substance has an extremely narrow safety margin. Small dosing errors can lead to life-threatening effects.
    🧪 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.

    Flunitrazolam

    Aliases: Fln, Fntz, Flunazolam

    Depressant Research-chemical Benzodiazepine

    Summary PsychonautWiki

    Flunitrazolam is a novel lesser-known depressant substance of the benzodiazepine class. It has been noted for its unusual potency for a benzodiazepine compound, being active in the low microgram range. This trait is also shared by compounds such as flubromazolam and clonazolam.

    Dose Information TheDrug.Wiki TripSit PsychonautWiki

    ROA Light Common Strong Heavy
    Oral 0.1-0.2mg 0.2-0.3mg 0.3-0.5mg 0.5mg+
    Light Common Strong Heavy

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

    ROA Onset Peak Offset After Effects Total
    Oral 20-40 min 1-2 hrs 2-4 hrs 1-12 hrs 3.3-6.7 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 6.9
    Strong+ 7/10

    Strong anxiolysis and cognitive impairment with moderate sedation and euphoria

    Anxiolysis ×3
    10
    anxiety suppression anxiolytic muscle relaxation muscle relaxant
    Sedation / Relaxation ×2
    6
    sedation muscle relaxation
    ⚠ Motor / Cognitive Impairment ×1
    10
    motor control loss amnesia memory suppression delusions of sobriety double vision
    Euphoria / Mood Lift ×1
    6
    euphoria disinhibition
    Based on reports from:
    Erowid Experience Reports PsychonautWiki Flunitrazolam
    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 3d Half tolerance 7d Baseline ~28d

    Tolerance to sedation/anxiolysis can build within several consecutive days of use and declines over 1–4 weeks of abstinence; estimates are generalized from benzodiazepine class guidance and HR resources rather than drug‑specific studies.

    Cross-Tolerances

    Other benzodiazepines
    80%
    Thienodiazepines (e.g., etizolam)
    70%
    Non‑benzodiazepine Z‑drugs
    50%

    Effects Erowid

    Aggregated from 4 Erowid experience reports

    Positive Effects 2

    Sedation 75.0% 70%
    Anxiety Suppression 75.0% 70%

    Adverse Effects 1

    Psychosis 75.0% 70%

    Combinations TripSit

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

    📘 Experience Reports 📖 TheDrug.Wiki 📖 TripSit 📖 PsychonautWiki