Methylphenidate is a central nervous system stimulant. It affects chemicals in the brain and nerves that contribute to hyperactivity and impulse control.
Methylphenidate is used to treat attention deficit disorder (ADD), attention deficit hyperactivity disorder (ADHD), and narcolepsy.
What is the problem with Ritalin? Like a lot of legal drugs, the problem comes when people abuse it by taking more than the doctor prescribed, in order to get high. When abused, Ritalin stimulates the mind and body in much the same way as amphetamines and cocaine.