SubstanceWiki

Encyclopedia of 381 substances with dosage & safety data

What it does

SubstanceWiki is a free encyclopedia of psychoactive substances built for harm reduction. It covers 381 substances with dosage tables, duration timelines, 14,967 interaction safety ratings, 240+ subjective effects, experience reports, and community insights. One interconnected reference instead of 15 open tabs across different sites. Built with Next.js and PostgreSQL. All content is CC-BY-SA licensed.

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