Promethazine
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4 sources
Also known as Phenergan, Lergigan
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Oral
Route dataPsychonautWiki
| Threshold | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| 5 mg | 12.5–25 mg | 25–50 mg | 50–100 mg | 100 mg+ |
0125 mg
LightCommonStrongHeavy
| Onset | 30–60 minutes |
|---|---|
| Come-up | 20–60 minutes |
| Peak | 1–2 hours |
| Offset | 3–5 hours |
| Total | 4–6 hours |
| After-effects | 12 hours |
OnsetCome-upPeakOffset
Plan when to take Promethazine — see where onset, peak and comedown land on the clock
Plan a dose of Promethazine
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Source: PsychonautWiki — Promethazine ↗
Fact-sheets from PsychonautWiki. Harm-reduction reference only — not medical advice.