GHB / GBL
F-Phenibut (Fluorophenibut)
Street names: F-Phenibut, 4F-Phenibut, Fluorobut
Overdose? Act now. Call emergency services — say "unresponsive, not breathing". Give naloxone for opioid-like signs. Hotlines
⚡What it does
- Same as phenibut (calm, sociability) but stronger and longer
⚠Key risks
- Same brutal dependence/withdrawal — the fluorine just means smaller doses make the same trap
- Dose-error risk: users dosing by phenibut habits overdose
- Withdrawal: anxiety, insomnia, psychosis, seizures
- No regulation = no quality control
✚Overdose signs
- Extreme sedation
- Slow breathing (with other depressants)
Category comparison — GHB / GBL
| Substance | Class | Top risks | Street price |
|---|---|---|---|
| F-Phenibut (Fluorophenibut) | Unscheduled grey market | Same brutal dependence/withdrawal — the fluorine just means smaller doses make the same trap; Dose-error risk: users dosing by phenibut habits overdose | $20–$50 per 10 g |
| GHB (gamma-hydroxybutyrate) | Schedule I/III | Dose curve is razor-thin — 1 mL too much = coma; Frequent dosing needed (90-min half-life) → dependence and brutal 24/7 withdrawal | ~$5–$20 per dose |
| GHB Liquid | Schedule I | Concentration unknown — strength varies bottle to bottle; Mixing with alcohol frequently fatal | ~$60–$150 per 100 mL |
| GHB Powder | Schedule I | Dissolving errors → misdosing; Hygroscopic powder clumps — uneven concentration | ~$40–$120 per 50 g where found |
| GBL (gamma-butyrolactone) | Schedule I | Stronger and faster than GHB; dosing even more unforgiving; Caustic — burns mouth/esophagus undiluted | ~$50–$150 per liter |
| Poppers (Alkyl Nitrites) | Legal to possess | Fatal blood-pressure crash when combined with Viagra/Cialis/Levitra (PDE5 inhibitors) — the classic killer combo; Methemoglobinemia at heavy/repeated use — blood stops carrying oxygen (blue lips, breathlessness) | ~$5–$20 per bottle |
Street prices are regional estimates. Potency and cuts vary constantly.
?Frequently asked questions
What does F-Phenibut (Fluorophenibut) look like?
White powder/capsules — fluorinated phenibut, several-fold more potent
What are the signs of a F-Phenibut (Fluorophenibut) overdose?
Extreme sedation; Slow breathing (with other depressants) Call emergency services immediately.
How addictive is it?
Same brutal dependence/withdrawal — the fluorine just means smaller doses make the same trap Withdrawal can be life-threatening — medical tapering is essential.