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Methamphetamine ( Pure Crystal Meth Ice) Methamphetamine is a powerful, highly addictive stimulant that affects the central nervous system. Also known as meth, chalk, ice, and crystal, among many other terms, it takes the form of a white, odorless, bitter-tasting crystalline powder that easily dissolves in water or alcohol. Methamphetamine Drug Description DescriptionMethamphetamine is a potent central nervous system stimulant that is mainly used as a recreational drug and less commonly as a second-line treatment for attention deficit hyperactivity disorder and obesity. Wikipedia Formula: C10H15N Duration of action: 10–20 hours Onset of action: Rapid Other names: N-methylamphetamine, N,α-dimethylphenethylamine, desoxyephedrine Metabolism: CYP2D6 and FMO3 Elimination half-life: 5–30 hours Addiction liability: High