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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.
    ⚠ Opioids carry significant risk of respiratory depression, physical dependence, and fatal overdose. Never combine with other depressants.

    U-47700

    Aliases: U4, Pink, Pinky, Pink heroin, u47700

    Categories

    Depressant Research-chemical Opioid
    U-47700 structure

    Summary TheDrug.Wiki TripSit PsychonautWiki

    U-47700 is an extremely dangerous synthetic opioid with approximately 7.5 times the potency of morphine and very little history of human use. It is uniquely caustic to mucous membranes and can cause severe tissue damage with insufflated, sublingual, or smoked administration. A laboratory-grade milligram scale is absolutely essential as sub-milligram differences can mean the difference between an active dose and fatal overdose. Respiratory depression is reportedly more severe than with traditional opioids at equivalent doses. U-47700 is now illegal in most jurisdictions worldwide following numerous overdose deaths.

    Dose Information TheDrug.Wiki TripSit PsychonautWiki

    ROA Light Common Strong Heavy
    Oral 5-7.5mg 7.5-15mg 15-25mg 25mg+
    Insufflated 4-6mg 6-8mg 8-10mg 10mg+
    Light Common Strong Heavy

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

    ROA Onset Comeup Peak Offset After Effects
    Oral 10-15 min - 2-3 hrs 2-3 hrs 2-4 hrs
    Insufflated 5-15 min 15-20 min 1-2 hrs 1-2 hrs 2-4 hrs
    Intravenous 0-1 min - 30-60 min 30-60 min 1-3 hrs
    Rectal 10-15 min - 1-2 hrs 1-2 hrs 2-4 hrs

    Tolerance

    Build-up develops within days of regular use; analgesic tolerance faster than respiratory depression tolerance
    Reset 7–14 days for partial reset; full reset may take weeks — tolerance loss greatly increases overdose risk

    Effects TheDrug.Wiki TripSit

    Positive
    • Physical Euphoria
    • Pain Relief
    • Cough Suppression
    • Analgesia
    Negative
    • Respiratory Depression
    • Dry Mouth
    Neutral
    • Sedation
    • Itchiness
    • Pupil Constriction
    • Difficulty Urinating
    • Relaxant
    Positive
    • Cognitive Euphoria
    • Anxiety Suppression
    • Dream Potentiation
    • Euphoria
    • Mood lift
    Negative
    • Constipation
    • Compulsive Redosing
    • Cognitive Fatigue
    • Thought Deceleration
    • Anxiety
    • Depression
    • Irritability
    Positive
    • Increased music appreciation
    • Perception of bodily lightness
    • Tactile enhancement
    Negative
    • Decreased Libido
    • Appetite Suppression
    • Light sensitivity
    • Disinhibition
    Neutral
    • Dulled perception
    • Sexual Dysfunction
    • Spontaneous physical sensations

    Combinations TripSit

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