Check out MAPS (Multidisciplinary Association for Psychedelic Studies) for harm reduction

"Founded in 1986, the Multidisciplinary Association for Psychedelic Studies (MAPS) is a 501(c)(3) non-profit research and educational organization that develops medical, legal, and cultural contexts for people to benefit from the careful uses of psychedelics and marijuana.

Our Work

We further our mission by:

Developing psychedelics and marijuana into prescription medicines
Training therapists and working to establish a network of treatment centers
Supporting scientific research into spirituality, creativity, and neuroscience
Educating the public honestly about the risks and benefits of psychedelics and marijuana."

Check out MAPS

More Info..

1. Brochures - Psychedelic Harm Reduction