SubstanceWiki
Encyclopedia of 381 substances with dosage & safety data
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Toprak

SubstanceWiki - Encyclopedia of 381 substances with dosage & safety data

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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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Toprak
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Hey PH! I built SubstanceWiki because finding reliable substance information shouldn't require 15 open tabs across different sites. PsychonautWiki for pharmacology, TripSit for interactions, Erowid for trip reports, Reddit for community knowledge — I wanted one place where all of that connects. The database now covers 381 substances with dosage tables, duration timelines, 14,967 interaction safety ratings, and 240+ catalogued subjective effects. Every substance page links to its effects, interactions, and related experience reports. The harm reduction angle isn't marketing — it's the reason the project exists. Every substance page leads with safety information because that's what matters most. People use substances whether we like it or not. Giving them accurate, complete information is how we keep them safer. I'd love feedback on what's missing, what's confusing, or what could be structured better. This information is safety-critical, so clarity matters more than aesthetics.