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What Is Marijuana?

From National Institute on Drug Abuse, for About.com

Updated: November 21, 2007

About.com Health's Disease and Condition content is reviewed by the Medical Review Board

Question: What Is Marijuana?
Answer: Marijuana is a green, brown, or gray mixture of dried, shredded leaves, stems, seeds, and flowers of the hemp plant. You may hear marijuana called by street names such as pot, herb, weed, grass, boom, Mary Jane, gangster, or chronic. There are more than 200 slang terms for marijuana.

Sinsemilla (sin-seh-me-yah; a Spanish word), hashish ("hash" for short), and hash oil are stronger forms of marijuana.

All forms of marijuana are mind-altering. In other words, they change how the brain works. They all contain THC (delta-9-tetrahydrocannabinol), the main active chemical in marijuana. They also contain more than 400 other chemicals. Marijuana's effects on the user depend on the strength or potency of the THC it contains (5). THC potency of marijuana has increased since the 1970s but has been about the same since the mid-1980s.

Back to: Marijuana FAQ for Kids

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