Amphetamine Drug DescriptionAmphetamine is a central nervous system stimulant marketed under the brand name Evekeo, among others. It is used in the treatment of attention deficit hyperactivity disorder, narcolepsy, and obesity. Amphetamine was discovered in 1887 and exists as two enantiomers: levoamphetamine and dextroamphetamine. Wikipedia Formula: C9H13N Drug class: CNS stimulant, anorectic Duration of action: IR dosing: 3–6 hours; XR dosing: 8–12 hours Onset of action: IR dosing: 30–60 minutes; XR dosing: 1.5–2 hours Other names: α-methylphenethylamine Metabolism: CYP2D6, DBH, FMO3 Elimination half-life: D-amph: 9–11 hours; L-amph: 11–14 hours; pH-dependent: 7–34 hours     Amphetamine crystal    is medically used to treat attention-deficit hyperactivity disorder (ADHD) and narcolepsy, a disease characterized by bouts of intense, inappropriate sleepiness.