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    4-Fluorobutyrfentanyl

    Aliases: pfbf, 4-fluorobutyrfentanyl, 4-fbf

    Categories

    opioid research-chemical habit-forming depressant

    Summary

    Rare, little known and extremely potent RC analogue of Fentanyl. This powerful opioid is generally only dispensed as a nasal spray. Handle with extreme caution and never mix with other depressants.

    Dose Information

    Onset, Duration & After-effects

    • Duration: 30-60 minutes

    Effects

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