4-Fluorophenibut
Aliases: Baflofen, Fluorobut, Cgp-11130, F-phenibut, Fluorophenibut
Summary
4-Fluorophenibut is a fluorinated analog of phenibut, reported to be 5-10 times more potent with faster onset and shorter duration. It acts primarily as a GABA-B receptor agonist with possible voltage-gated calcium channel activity. Users report more pronounced physical effects and euphoria compared to phenibut, with a correspondingly higher risk of dependence and compulsive redosing.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 100-150mg | 150-400mg | 400-600mg | 600mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 20-90 min | 30-60 min | 2-5 hrs | 2-4 hrs | 4.8-11.5 hrs |
Tolerance
Build-up
develops over 1–4 weeks of regular use
Reset
days to weeks depending on duration of use
Tolerance Decay
Full tolerance
3d
Half tolerance
7d
Baseline
~14d
Community experience suggests tolerance accrues rapidly with consecutive-day use and decays over 1–3+ weeks; figures are indicative only and not clinically validated.
Effects
Aggregated from 7 Erowid experience reports
Positive Effects 8
Euphoria
57.1%
70%
Focus Enhancement
57.1%
70%
Anxiety Suppression
57.1%
70%
Color Enhancement
42.9%
70%
Music Enhancement
42.9%
70%
Stimulation
42.9%
70%
Sedation
42.9%
70%
Empathy
42.9%
70%
Adverse Effects 0
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