2 sources
Collated from PsychonautWiki, Pharmacology. Where sources differ (e.g. dosing), Compare shows them side by side.
Also known as 4F-MPHPW
Insufflated
Route dataPsychonautWiki
| Threshold | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| 5 mg | 5–8 mg | 8–14 mg | 14–20 mg | 20 mg+ |
025 mg
LightCommonStrongHeavy
| Onset | 10–30 minutes |
|---|---|
| Peak | 1–2 hours |
| Offset | 1–2 hours |
| Total | 3–6 hours |
| After-effects | 4–8 hours |
OnsetCome-upPeakOffset
Oral
Route dataPsychonautWiki
| Threshold | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| 5 mg | 5–10 mg | 10–15 mg | 15–20 mg | 20 mg+ |
025 mg
LightCommonStrongHeavy
| Onset | 30–60 minutes |
|---|---|
| Peak | 2–4 hours |
| Offset | 1–2 hours |
| Total | 4–8 hours |
| After-effects | 5–10 hours |
OnsetCome-upPeakOffset
Unsafe interactionsPW
Caution / uncertainPW
🧬 Receptor activityPH
Plan when to take 4F-MPH — see where onset, peak and comedown land on the clock
Plan a dose of 4F-MPH
Loading the fact-sheet…
Logging a dose needs somewhere to keep it. Start a free session — no signup; it and everything in it expire in 7 days.
Fact-sheets from PsychonautWiki. Harm-reduction reference only — not medical advice.