SubstanceGuide

Evidence-based drug information & harm reduction

Evidence-Based Drug Information & Harm Reduction

Non-judgmental, scientifically accurate information about psychoactive substances. Knowledge saves lives. This site does not promote drug use — it promotes survival.

Harm Reduction Notice: This site does not promote drug use. It provides evidence-based information to reduce harm. If you or someone you know is struggling with substance use, call SAMHSA: 1-800-662-4357 (free, confidential, 24/7). In an emergency, call 911. Naloxone saves lives — carry it.

Substance Classes

Critical Information