Marijuana is a dry, shredded green and brown mix of leaves, flowers, stems, and seeds from the hemp plant Cannabis sativa. In a more concentrated, resinous form, it is called hashish, and as a sticky black liquid, hash oil. The main psychoactive (mind-altering) chemical in marijuana is delta-9-tetrahydrocannabinol, or THC. Learn more about marijuana
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- Effects of Cannabis Use on Human Behavior, Including Cognition, Motivation, and Psychosis: A Review (JAMA Psychiatry, February 2016)
- Brain structure and predisposition for cannabis use (September, 2015)
- Importance of controlling for alcohol use when exploring marijuana’s impact on brain structure (May, 2015)
- Cannabinoid Receptor 2: Pain Treatment Without Tolerance or Withdrawal (April, 2015)
- Recreational marijuana use associated with increased impulsivity and hostility in daily life (February 17, 2015)
- Cannabinoid CB2 Receptors in Brain Reward Systems (January 13, 2015)
- I-Science: #CPDD What's Hot - Mothers and Marijuana Use (October 2015)
- I-Science: #CPDD What's Hot - Breastfeeding and Marijuana Use (August 2015)
- NIDA Encourages Community Based Marijuana Research (November 2014)
- 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: Facts for Teens
- Marijuana: Download the Facts Poster (Teaching Guide)
- Heads Up: Real News About Drugs and Your Body- Year 11-12 Compilation for Students
- Heads Up: Real News About Drugs and Your Body- Year 11-12 Compilation for Teachers
- Marijuana’s Lasting Effects on the Brain, (Message from the NIDA Director, September 2012)
- NIDA for Teens: Marijuana
- MEDLINEplus Health Information on Drug Abuse - National Library of Medicine, NIH
- www.abovetheinfluence.com - Office of National Drug Control Policy
- healthfinder.gov - U.S. Department of Health and Human Services
Past information on many drugs of abuse is available on our Archives site.
Clinical trials are research studies in human volunteers conducted to answer specific health questions. Learn about the NIH-sponsored clinical trials available to you.
- NIDA Clinical Trial Locator - answer a few simple questions and get contact information for Clinical Trials near you.
Other Clinical Trials information sources:
- NIH Clinical Trials and You - NIH site that helps explain about clinical trials and why people participate.
- NIDA Trials at ClinicalTrials.gov - a resource of federally and privately supported clinical trials.
- Clinical Research Studies from the National Drug Abuse Treatment Clinical Trials Network (CTN) - a NIDA coordinated network of research institutions conducting human trials on drug abuse solutions.
- Research Studies at NIDA Intramural Research Program - located in Baltimore, Maryland.
Get more information on Emerging Trends, we will update this page with the latest research findings as they develop.
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National Institute on Drug Abuse. Marijuana Retrieved from https://www.drugabuse.gov/drugs-abuse/marijuana
Explores the latest research on marijuana, including the scope of marijuana use in the U.S., health consequences, its effects on every-day activities, available treatments.