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Harm Reduction List of harm reduction organizations or groups.

SubstanceWiki (substancewiki.org)
SubstanceWiki is a free, open-source substance encyclopedia focused on harm reduction. It covers 397+ substances with detailed dosage tables by route of administration, interaction charts, effect profiles, duration timelines, and community experience reports.
What makes it different from other resources: it combines the encyclopedic depth of traditional wikis with real community perspectives from Reddit and harm reduction forums. Every substance page includes dosage ranges, interaction warnings, detection information, and practical harm reduction guidance.
The site also has 67+ in-depth articles covering topics like drug testing (reagent kits, fentanyl test strips), the science of microdosing, substance comparisons, and historical pieces on psychedelic research.

All content is free and (for now)there are no ads. The goal is to make reliable, evidence-based substance information as accessible as possible.

URL: https://substancewiki.org
 
There are actually quite a few harm reduction groups out there doing really important work. Some well-known ones include the National Harm Reduction Coalition and Harm Reduction International they focus on things like overdose prevention, education, and safer practices. There’s also the Drug Policy Alliance, which works more on policy and awareness. Apart from these, a lot of local community groups also provide support, information, and basic health services. Sometimes those smaller organizations are the most helpful because they’re closer to the ground. Overall, harm reduction is more about keeping people safe and informed rather than judging, and these groups play a big role in that.
 
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