Ritalin 20mg is a prescription medication commonly used to treat Attention Deficit Hyperactivity Disorder (ADHD) and narcolepsy. Containing the active ingredient Methylphenidate Hydrochloride, Ritalin works by stimulating the central nervous system to improve focus, attention span, and control over impulsive behavior. It is widely prescribed by doctors for patients experiencing hyperactivity, difficulty concentrating, or excessive daytime sleepiness.