Methamphetamine

Methamphetamine (pronounced /?m??æm?f?t?mi?n/ listen), also known as metamfetamine (INN), dextromethamphetamine, methylamphetamine, N-methylamphetamine, desoxyephedrine, and colloquially as meth (not to be confused with methadone, sometimes referred to as "meth" by opioid users) or crystal meth, is a psychoactive stimulant (psychostimulant or psychoanaleptic) drug. It increases alertness, concentration, energy, and in high doses, can induce euphoria, enhance self-esteem, and increase libido. Methamphetamine has high potential for abuse and addiction by activating the psychological reward system via increasing levels of dopamine, norepinephrine and serotonin in the brain. Methamphetamine is approved by the U.S. Food and Drug Administration (FDA) for the treatment of attention-deficit hyperactivity disorder (ADHD) and exogenous obesity, under the trademark name Desoxyn.