Among the club drugs, methamphetamine accounts for the largest share of ER visits and is most frequent in metropolitan areas in the western U.S.
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."
Increases wakefulness and physical activity and decreases appetite. Chronic, long-term use can lead to psychotic behavior, hallucinations, and stroke.