Concerta is a legitimate medication used to treat Attention Deficit Hyperactivity Disorder (ADHD). It has the generic name methylphenidate. It is a stimulant, which helps improve your focus and concentration. At the same time, the drug also helps control impulsive and hyperactive behaviors. That way, if you have ADHD, Concerta can help you concentrate on tasks and finish them faster. Concerta is potentially addictive, though. If you’re curious if this drug is illegal or not, read more to find out….