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Methamphetamine is a central nervous system stimulant drug similar to amphetamine. Methamphetamine is available only through a prescription that cannot be refilled. Although methamphetamine can be prescribed by a doctor, its medical uses are limited. Methamphetamine is a white, odorless, bitter-tasting crystalline powder that easily dissolves in water or alcohol and is then snorted, injected by needle, or smoked. Methamphetamine increases alertness, concentration, energy, and in high doses, may induce euphoria, enhance self-esteem and increase libido. Methamphetamine has high potential for abuse and addiction, activating the psychological reward system by triggering a cascading release of dopamine in the brain. Methamphetamine is FDA approved for the treatment of ADHD and exogenous obesity. It is dispensed in the USA under the trademark name Desoxyn. Street names for illegally produced methamphetamines include: crystal meth, meth, crystal, ice, p, shabu, speed, singolah, bunzun, glass, tina, or crank. Physical effects include: anorexia, hyperactivity, dilated pupils, flushing, restlessness, dry mouth, headache, tachycardia, bradycardia, tachypnea, hypertension, hypotension, hyperthermia, diaphoresis, diarrhea, constipation, blurred vision, dizziness, twitching, insomnia, numbness, palpitations, arrhythmias, tremors, dry and/or itchy skin, acne, pallor, and with chronic and/or high doses, convulsions, heart attack, stroke, and death.
