Ritalin is a prescription medication that contains methylphenidate, which is a stimulant for the central nervous system. It's commonly used to treat Attention Deficit Hyperactivity Disorder (ADHD) and narcolepsy. This medication can help improve attention, concentration, and impulse control in both kids and adults. It's really important to take Ritalin exactly as your healthcare provider prescribes to ensure it's safe and effective for you.