Marijuana: Facts for Teens
(Revised)

National Institute on Drug Abuse
National Institutes of Health
U.S. Department of Health and Human Services

NIH Publication No. 98-4037
Printed 1995, Revised November, 1998

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• What is marijuana?
• How is marijuana used?
• How long does marijuana stay in the user's body?
• How many teens smoke marijuana?
• Why do young people use marijuana?
• What happens if you smoke marijuana?
• What are the short-term effects of marijuana use?
• Does marijuana affect school, sports, or other activities?
• What are the long-term effects of marijuana use?
• Does marijuana lead to the use of other drugs?
• How can you tell if someone has been using marijuana?
• Is marijuana sometimes used as a medicine?
• How does marijuana affect driving?
• If someone is pregnant and smokes it, will marijuana hurt the baby?
• What does marijuana do to the brain?
• Can people become addicted to marijuana?
• What if a person wants to quit using the drug?
• Annotated Reference List