Library
4-fluorobutirfentanil
4-Fluorobutyrfentanyl is a potent synthetic opioid and analog of butyrfentanyl that has been sold online as a designer drug. It is closely related to 4-fluorofentanyl. The substance is reportedly rare, and very little is known about its pharmacological profile or safety margins. It is generally administered as a nasal spray. Due to its extreme potency, it should be handled with great caution and never combined with other depressants.
Also known as: Pfbf, 4-fbf, para-fluoroBenzylfentanyl, 4-Fluorobutyrylfentanyl
Classification
- Chemical: Anilidopiperidine
- Chemical: Opioid
- Psychoactive: Depressant
- Tag: Habit-Forming
- Tag: Research-Chemical
- Tag: Sedative
- Tag: Synthetic opioid
Effects
- Pupil Constriction
- Sedation
- Pain Relief
- Itchiness
- Nausea
- Dry Mouth
- Euphoria
- Mood Enhancement
- Mood Lift
- Reduced Anxiety
- Anxiety Suppression
- Dulled Perception
Routes of Administration
Oral
Dosage
- Heavy: 1.2 mg
- Light: 300 – 600 µg
- Common: 600 – 900 µg
- Strong: 900 – 1200 µg
- Threshold: 300 ug
Duration
No data available for this section yet.
Harm Reduction
Check interactions before mixing substances, pay attention to dose spacing and hydration, and treat all dosage guidance as approximate rather than guaranteed safe.
Sources
Substance data is aggregated from the following public harm-reduction and reference sources.
Links
This static page is intended as a readable non-JS and prerender-friendly library export.
