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Marijuana is a powerful drug made from cannabis sativa -- commonly
known as the hemp
plant -- that is smoked for its intoxicating effects. The primary active
ingredient in marijuana is delta-9 tetrahydrocannabinol
(THC), and it is this
complex chemical that produces most of the psychoactive (mind-altering)
reactions
experienced by marijuana users. The level of THC determines the potency of
the drug.
This level can range from 0.01 to 10 percent, the latter being 1,000 times
more potent than the former. Most often, marijuana is prepared using the
dried flowers and leaves of the hemp plant.
Other related drugs made
from the hemp plant are hashish, made from the plant resin, and
hash oil,
which is made from an oily extract of either
hashish or marijuana. These drugs usually are smoked in cigarettes
("joints") or pipes,
or they are baked into brownies
or cookies. Common slang terms for marijuana include "grass," "weed,"
"pot," and "dope."
--Courtesy of the Indiana Prevention
Resource Center, Indiana University; Photo from LaAntidroga.com.
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