methamphetamine
n. a CNS stimulant whose chemical structure is similar to that of amphetamine. It is used for treating attention-deficit/hyperactivity disorder in children and as a short-term aid to obesity treatment in adults. Like all amphetamines, methamphetamine is prone to abuse and dependence. It can be smoked, snorted, ingested orally, or injected. After the initial rush—it increases activity levels and induces a general sense of well-being—a state of high agitation that can lead to violence is experienced by some users. Long-term abuse is associated with nerve damage and behavioral and mental status changes, including psychosis. U.S. trade name: Desoxyn.