Library
4F-MABP
4F-MABP is a little-studied fluorinated analogue of buphedrone first identified on the European NPS market in 2014. Animal data and seizure analyses show it acts as a dopamine and norepinephrine reuptake inhibitor comparable in potency to flephedrone. Human reports are scarce; effects resemble other short-acting cathinones with rapid onset euphoria, strong urge to redose, and an uncomfortable crash. Because no pharmacological or toxicological studies in humans exist, dosing should start low. Users have reported pronounced peripheral vasoconstriction and tachycardia.
Also known as: 4-fbp, 4-fluorobuphedrone, Para-fluorobuphedrone, 4F‑buphedrone, 4-Fluorobephedrone
Classification
- Chemical: Cathinone
- Chemical: Phenethylamine
- Psychoactive: Stimulant
- Tag: Research-Chemical
Effects
- Stimulation
- Vasoconstriction
- Temperature Regulation Suppression
- Teeth Grinding
- Jaw Clenching
- Increased Heart Rate
- Euphoria
- Focus Enhancement
- Motivation Enhancement
- Increased Sociability
- Talkativeness
- Empathy Enhancement
- Music Appreciation Enhancement
- Increased Libido
- Appetite Suppression
- Dehydration
- Increased Music Appreciation
- Light Sensitivity
Routes of Administration
Oral
Dosage
- Threshold: 20 mg
- Light: 30 – 60 mg
- Common: 60 – 120 mg
- Strong: 120 – 180 mg
- Heavy: 180 mg +
Duration
- Onset: 0.25-0.5 h
- Comeup: 0.5-0.75 h
- Peak: 1-2 h
- Offset: 2-3.5 h
- After Effects: 2-6 h
- Total Duration: 3-5 h
Insufflated
Dosage
- Threshold: 10 mg
- Light: 15 – 30 mg
- Common: 30 – 70 mg
- Strong: 70 – 120 mg
- Heavy: 120 mg +
Duration
- Onset: 0.033-0.083 h
- Comeup: 0.17-0.33 h
- Peak: 0.5-1.5 h
- Offset: 0.5-1 h
- After Effects: 2-6 h
- Total Duration: 2-4 h
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
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