Marijuana refers to the dried leaves, flowers, stems, and seeds from the hemp plant, Cannabis sativa. The plant contains the mind-altering chemical delta-9-tetrahydrocannabinol (THC) and other related compounds. Extracts can also be made from the cannabis plant. Read the DrugFacts.
- Marijuana: Facts for Teens - Order this publication.
- Marijuana: Download the Facts Poster (Teaching Guide)
- NIDA for Teens Drug Facts on Marijuana - Offers resources for teens and teen influencers. Get the latest on how drugs affect the brain and body. Features videos, games, blog posts, and more!
- Heads Up: Real News About Drugs and Your Body- Year 19-20 Compilation for Students
- Heads Up: Real News About Drugs and Your Body- Year 19-20 Compilation for Teachers
- Mixed Signals: The Administration’s Policy on Marijuana, Part Four -- Scientific Focus on the Adverse Health Effects of Marijuana Use (Testimony to Congress, June 2014)
- Marijuana’s Lasting Effects on the Brain (Message from the NIDA Director, March 2013)
- NIH Director’s Blog on Marijuana
- First-Episode Psychosis and Co-Occurring Substance Use Disorders (SAMHSA)
- Marijuana Use and Perceived Risk of Harm from Marijuana Use Varies Within and Across States (SAMHSA CBHSQ Short Report, July 2016)
- MEDLINEplus Health Information on Substance Use Disorders (National Library of Medicine, NIH)
- Healthfinder.gov (U.S. Department of Health and Human Services)
Clinical trials are research studies in human volunteers conducted to answer specific health questions. Learn about the NIH-sponsored clinical trials available to you.