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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.

    Phenazepam

    Aliases: Fenaz, Panda, Bonsai, Soviet benzo, Bromdihydrochlorphenylbenzodiazepine

    Categories

    Depressant Research-chemical Benzodiazepine
    Phenazepam structure

    Summary TheDrug.Wiki TripSit

    Phenazepam is an extremely potent, long-acting benzodiazepine developed in the Soviet Union in 1975, reportedly 5-10 times stronger than diazepam. Its extremely long half-life and delayed onset of peak effects create severe risks: users often redose before feeling effects, leading to dangerous accumulation and blackouts lasting days or weeks. Not approved in most Western countries but sometimes sold online or found in counterfeit pharmaceuticals. Medical doses range from 0.5-2mg; recreational doses above 2mg carry extreme overdose risk. Effects can persist for 3+ days with substantial amnesia and impairment.

    Dose Information TheDrug.Wiki TripSit

    ROA Light Common Strong Heavy
    Oral 0.5-1mg 1-2mg - 2-4mg+
    Sublingual 0.5-1mg 1-2mg - 2-4mg+
    Light Common Strong Heavy

    Onset, Duration & After-effects TheDrug.Wiki TripSit

    ROA Onset Comeup Peak Offset After Effects Total
    Oral 20-60 min 1-3 hrs 2-4 hrs 24-72 hrs 0 min 0 min
    Sublingual 15-45 min 30-90 min 2-4 hrs 24-72 hrs 0 min 0 min
    Insufflated 10-30 min 30-90 min 2-4 hrs 24-72 hrs 0 min 0 min

    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
    Cross-tolerance
    Alprazolam Diazepam Clonazepam Lorazepam Etizolam Bromazolam Clonazolam Flualprazolam

    Effects TheDrug.Wiki TripSit

    Positive
    • Muscle relaxation
    • Anxiolytic
    • Muscle Relaxant
    • Physical euphoria
    Negative
    • Respiratory depression
    • Motor impairment
    Neutral
    • Sedation
    • Sedative
    • Dystaxia
    • Hypnotic
    Positive
    • Anxiety suppression
    Negative
    • Amnesia
    • Motor control loss
    • Cognitive impairment
    • Dizziness
    • Compulsive redosing
    • Dream suppression
    • Thought deceleration
    • Delusions of sobriety
    • Emotion suppression
    Positive
    • Increased libido
    • Appetite enhancement
    Negative
    • Disinhibition
    • Acuity suppression
    • Visual acuity suppression
    • Acuity Suppression
    • Decreased Libido
    • Double vision
    Neutral
    • Dulled perception
    • Perception of bodily heaviness

    Combinations TripSit

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