Copy this link to order: https://medznow.com/adhd/ritalin/ Ritalin (methylphenidate) is a focused sensory system energizer approved for the treatment of narcolepsy (wild sluggishness) and attention deficit hyperactivity disorder (ADHD). Ritalin is a nonexclusive medication that is available. Ritalin is a mild central nervous system (CNS) stimulant available in tablets of 5, 10, and 20 mg for oral administration; Ritalin-SR is available in supported discharge tablets of 20 mg for oral administration.