Order  Ritalin Online. To treat ‘Attention Deficit Hyperactivity Disorder’ (ADHD). Ritalin pill  is used in children and young people between 6 and 18. Generic Ritalin is used after trying treatments that do not involve medicines, Such as counseling and behavioral therapy. ADHD Ritalin is not for use as a treatment for ADHD in children under 6 years of age or in adults....