Ritalin medication is a corticosteroid prescribed for arthritis, asthma, certain blood disorders and skin conditions.Ritalin for Salestops the release of substances in the body that cause tenderness.It comes as a tablet to take by mouth, with food. It also comes as a resolution for injection to be administered by a healthcare supplier into the vein. The suggested dosage range is 4 to 32mgday every 6 – 8 weeks.