Methamphetamine is an addictive stimulant drug that strongly
activates certain systems in the brain. Methamphetamine is
closely related chemically to amphetamine, but the central
nervous system effects of methamphetamine are greater. Both
drugs have some limited therapeutic uses, primarily in the
treatment of obesity. Methamphetamine is made in illegal
laboratories and has a high potential for abuse and addiction.
Street methamphetamine is referred to by many names, such as
"speed," "meth," and "chalk." Methamphetamine hydrochloride,
clear chunky crystals resembling ice, which can be inhaled by
smoking, is referred to as "ice," "crystal," "glass," and
"tina." Methamphetamine releases high levels of the
neurotransmitter dopamine, which stimulates brain cells,
enhancing mood and body movement. It also appears to have a
neurotoxic effect, damaging brain cells that contain dopamine
and serotonin, another neurotransmitter. Over time,
methamphetamine appears to cause reduced levels of dopamine,
which can result in