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    Benzodiazepines can cause physical dependence with regular use. Withdrawal can be life-threatening. Never combine with opioids or alcohol.

    Flunitrazepam

    Aliases: R2, Roches, Roofies, Ruffies, Circles, rohypnol

    Summary TheDrug.Wiki Erowid TripSit PsychonautWiki

    Flunitrazepam is an extremely potent benzodiazepine, approximately 10 times stronger than diazepam by weight, with pronounced hypnotic and amnesic properties. It is notorious for its association with drug-facilitated sexual assault. The substance causes severe anterograde amnesia at therapeutic doses and can produce delusions of sobriety despite severe impairment.

    Dose Information TheDrug.Wiki TripSit PsychonautWiki

    ROA Light Common Strong Heavy
    Oral 0.5-1mg 1-3mg 3-4mg 4mg+
    Light Common Strong Heavy

    Benzo Equivalence Calculator

    mg
    1.0 mg Flunitrazepam
    =
    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 15-30 min 30-60 min 2-4 hrs 6-12 hrs 24-24 hrs 8.8-17.5 hrs

    Effect Profile

    14 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
    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
    10
    cognitive euphoria physical euphoria disinhibition

    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 21d Half tolerance 7d Baseline ~14d

    Clinical and community data indicate tolerance to hypnotic and anticonvulsant effects develops over weeks with regular use and decays over 1–4+ weeks after cessation; data are approximate and interindividual.

    Effects Erowid

    Aggregated from 14 Erowid experience reports

    Positive Effects 4

    Anxiety Suppression 57.1% 70%
    Sedation 50.0% 70%
    Stimulation 42.9% 70%
    Euphoria 42.9% 70%

    Adverse Effects 1

    Memory Suppression 28.6% 70%

    Combinations TripSit

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