Marijuana is the most commonly used illegal drug in the U.S. It is made up of dried parts of the Cannabis sativa hemp plant.
Pot, ganga, weed, grass, 420
Short-term effects of marijuana use include euphoria, distorted perceptions, memory impairment, and difficulty thinking and solving problems.
Statistics and Trends
In 2009, 28.5 million Americans age 12 and older had abused marijuana at least once in the year prior to being surveyed. Source: National Survey on Drug Use and Health (Substance Abuse and Mental Health Administration Web Site). The NIDA-funded 2010 Monitoring the Future Study showed that 13.7% of 8th graders, 27.5% of 10th graders, and 34.8% of 12th graders had abused marijuana at least once in the year prior to being surveyed. Source: Monitoring the Future (University of Michigan Web Site).
Marijuana Lesson Kit - A kit to educate teenage students about the health consequences of improper prescription drug use. The kit includes enough copies for 30 students.
Order Individual Publications:
- Marijuana’s Lasting Effects on the Brain, (Message from the NIDA Director, September 2012)
- NIDA for Teens: Marijuana
Get more information on K2/Spice, Salvia and Bath Salts. NIDA will update this page with the latest research findings on these and other emerging drugs as they develop.
Looking for Treatment?
Use the SAMHSA Treatment Locator or 1-800-662-HELP.
As a result of scientific research, we know that addiction is a disease that affects both brain and behavior.