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ADHD Medication - Concerta Concerta is an ADHD medication that contains methylphenidate. It is the same substance found in Ritalin. is a central nerve system stimulant that improves concentration and focus. It also reduces impulsive as well as hyperactive behavior. It is used to treat ADHD and Narcolepsy. It is a potent appetite suppressant, which is why it is used to treat certain people. It acts as a stimulant Concerta is a potent stimulant that is used to treat ADHD. It is a methylphenidate-base