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4-FA

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Dose
Duration

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EntactogenStimulantSubstituted amphetamines

Also known as 4-FA, 4-FMP, PAL-303, Flux

Addiction potential
moderately addictive with a high potential for abuse
Tolerance
full tolerance develops with prolonged and repeated use; half after 3 - 7 days; baseline after 1 - 2 weeks
Cross-tolerance
dopamine, stimulants

Oral

Route dataPsychonautWiki

Dose
WeakerStronger
ThresholdLightCommonStrongHeavy
40 mg40–100 mg100–130 mg130–150 mg150 mg+
0187.5 mg
LightCommonStrongHeavy
Duration
ShorterLonger
Onset45–75 minutes
Come-up30–75 minutes
Peak2.5–3.5 hours
Offset2–3 hours
Total5–8 hours
After-effects6–12 hours
OnsetCome-upPeakOffset

Dangerous interactions

TramadolaMTMAOIs
Plan when to take 4-FA — see where onset, peak and comedown land on the clock

Source: PsychonautWiki — 4-FA ↗

Fact-sheets from PsychonautWiki. Harm-reduction reference only — not medical advice.