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Secobarbital

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Also known as Secobarbital, Secobarbitone, Seconal

Fatal overdose may occur when barbiturates are combined with other depressants such as opiates, benzodiazepines, gabapentinoids, thienodiazepines, alcohol or other GABAergic substances.[1] It is strongly discouraged to combine these substances, particularly in common to heavy doses.

Addiction potential
extremely physically and psychologically addictive
Toxicity
moderate toxicity

Oral

Route dataPsychonautWiki

ThresholdLightCommonStrongHeavy
20 mg25–50 mg50–150 mg150–300 mg—+
0300 mg
LightCommonStrongHeavy
Onset15–60 minutes
Peak4–8 hours
Offset2–4 hours
Total6–10 hours
After-effects1–24 hours
OnsetCome-upPeakOffset
Plan when to take Secobarbital — see where onset, peak and comedown land on the clock

Source: PsychonautWiki — Secobarbital ↗

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