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4-Fluorobutyrfentanyl
Also known as: pfbf, 4-fluorobutyrfentanyl, 4-fbf
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.
Dosage
Oral
Common: 600-900ug
Light: 300ug
Strong: 900-1200ug.
Duration
Onset: Insufflated <5 minutes.
Duration: 30-60 minutes
Timeline
Onset
Insufflated <5 minutes.
Peak
30-60 minutes
033m1.1h
Typical
Extended range
Effects
EuphoriaDry MouthMood liftItchinessRelaxantConstipationPupil constrictionAnalgesia