Order Ritalin 20mg Online Extremely Quick Delivery  Ritalin  is a prescription medication primarily used to treat Attention Deficit Hyperactivity Disorder (ADHD) and narcolepsy. It is a combination of amphetamine and dextroamphetamine, which are central nervous system stimulants. These compounds work by increasing the levels of certain neurotransmitters in the brain, such as dopamine and norepinephrine, which help improve focus, attention, and impulse control.