Marijuana: Facts for teens

What is marijuana? Are there different kinds?
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; it’s a Spanish word), hashish (“hash” for short), and hash oil are stronger forms of marijuana.
All forms of marijuana are mind-altering (psychoactive). 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 it’s strength or potency, which is related to the amount of THC it contains. The THC content of marijuana has been increasing since the 1970s. For the year 2006, most marijuana contained, on average, 7 percent THC.

How is marijuana used?
Most users roll loose marijuana into a cigarette (called a joint or a nail) or smoke it in a pipe or water pipe, sometimes referred to as a bong. Some users mix marijuana into foods or use it to brew a tea. Another method is to slice open a cigar and replace the tobacco with marijuana, making what's called a blunt. Marijuana cigarettes or blunts sometimes contain other substances as well including crack cocaine.

How long does marijuana stay in the user's body?
THC in marijuana is rapidly absorbed by fatty tissues in various organs. Generally, traces (metabolites) of THC can be detected by standard urine testing methods several days after a smoking session. In heavy users, however, traces can sometimes be detected for weeks after they have stopped using marijuana.

How many teens smoke marijuana?
Contrary to popular belief, most teenagers do not use marijuana. Among students surveyed in a yearly national survey, only about one in seven 10th graders report they are current marijuana users (that is, used marijuana within the past month). Fewer than one in five high school seniors is a current marijuana user.

Why do young people use marijuana?
There are many reasons why some children and young teens start smoking marijuana. Many young people smoke marijuana because they see their brothers, sisters, friends, or even older family members using it. Some use marijuana because of peer pressure.
Others may think it’s cool to use marijuana because they hear songs about it and see it on TV and in movies. Some teens may feel they need marijuana and other drugs to help them escape from problems at home, at school, or with friends.
No matter how many shirts and caps you see printed with the marijuana leaf, or how many groups sing about it, remember this: You don’t have to use marijuana just because you think everybody else is doing it. Most teenagers do not use marijuana!

from drugabuse.gov