Marijuana is a dry, shredded mix of flowers, stems, seeds and leaves of the hemp plant Cannabis sativa. People usually smoke it as a cigarette or in a pipe. It is the most commonly abused illegal drug in the United States.
Abusing marijuana can result in problems with memory, learning and social behavior. It can interfere with family, school, work and other activities.
Scientific studies are underway to test the safety and usefulness of cannabis compounds for treating certain medical conditions. Currently, smoking marijuana is not recommended for the treatment of any disease or condition.

NIH: National Institute on Drug Abuse

Basics	Overviews Latest News Treatment
Learn More	Alternative Therapy Related Issues
Multimedia & Cool Tools	Pictures & Photographs Health Check Tools Games
Research	Clinical Trials Research Journal Articles
Reference Shelf	Dictionaries/Glossaries Directories Organizations Newsletters/Print Publications Statistics
For You	Children Teenagers Women Patient Handouts