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Methylphenidate, brand name Ritalin, is an amphetamine-like central nervous system stimulant used to treat attention-deficit hyperactivity disorder (ADHD) in children, adolescents, and adults, as well as narcolepsy. 1 It is a Schedule II controlled substance.
Even when Ritalin is used as a prescription drug, it may have severe effects including nervousness, insomnia, anorexia, loss of appetite, pulse changes, heart problems and weight loss. The manufacturer says it is a drug of dependency.