Ritalin 10mg contains methylphenidate, a central nervous system (CNS) stimulant. It was approved by the FDA in 1955 and is one of the oldest medications used to treat ADHD. Ritalin 10mg affects certain chemicals in the brain and nerves that contribute to hyperactivity and impulse control. It blocks the reuptake of neurotransmitters dopamine and norepinephrine and simultaneously promotes their release in the brain.