Buy Ritalin 10mg is used for the treatment of both ADHD as well as narcolepsy. By changing certain brain chemicals to offer a feeling of calm, this is an effective ADHD medication. It also has a stimulating effect for those that have narcolepsy. It keeps them awake throughout the day and allows them to stay alert. Ritalin is available in the form of tablets and is often taken twice to three times daily.