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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 Encyclopedic
    Encyclopedic
    Typical encyclopedia coverage. Cross-reference for important decisions.
    • 4 corroborating sources
    • 1 ROA with full dose ladder
    • duration data present
    • 17 combo interactions documented
    • toxicity data (PsychonautWiki)
    • classified Tentative
    • classified Research-chemical

    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 dose.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 dose.wiki TripSit PsychonautWiki

    ROA Onset Peak Offset After Effects Total
    Oral 20-40 min 1-2 hrs 2-4 hrs 1-12 hrs 4-5 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 6.6
    Strong+ 7/10

    Strong anxiolysis and cognitive impairment with moderate euphoria, mild sedation

    Anxiolysis ×3
    10
    anxiety suppression anxiolytic muscle relaxation muscle relaxant
    Sedation / Relaxation ×2
    5
    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
    View methodology →

    Import into PsychonautWiki Journal

    The PsychonautWiki Journal app includes Flunitrazolam, but its built-in data can be thinner than ours. Importing this file adds a separate "Flunitrazolam (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 "Flunitrazolam (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 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

    Cross-Check Flunitrazolam 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
    Dosing Higher Only Increases the Hypnotic Aspect neutral exp #109332

    Flunitrazolam 200ug When testing a new benzo related compound, I always make small report in which I write down everything I do, who I talk to and about what. The reason being that I can check my writings the next day to see if there are any holes in my memory.

    Rampelflik · 100 - 500 ug oral
    No Memory Loss cautionary exp #111612

    With scarce information and experience reports on the new research chemical Flunitrazolam, I feel obligated to reveal my experience with this very unique drug. Prior Benzo use - Ativan, Xanax, Clonazolam, and Etizolam. I must say, this is the ONLY one that actually worked for sleep.

    Jessicaa
    Lying in My Bed, Hoping I Won't Die cautionary exp #114401

    I'm right now on day 5 of my horrific withdrawal from Flunitrazolam and I'm only now able to even type anything on the PC. It was horrible but rather quick, today I only feel maybe slightly weird, barely noticable and I'm just glad I survived this.

    theAngryLittleBunny
    Flunitrazolam's nerd page Pharmacology, chemical data, effect profiles, and more
    →

    Helpful Links

    📘 Experience Reports 📖 dose.wiki 📖 TripSit 📖 PsychonautWiki