If you are looking to treat attention deficit hyperactivity disorder (ADHD) or narcolepsy, Buy Ritalin Online be a prescription medication worth discussing with your doctor. It contains a chemical that can enhance the effects of dopamine and norepinephrine, which regulate attention and alertness in the brain. Ritalin comes in tablet forms like 10mg, and 20mg. It should only be taken under the supervision of a verified doctor.