Ritalin is a red prescription medication used to treat children with attention deficit-hyperactivity disorder (ADHD). Its active ingredient, methylphenidate, has the function of stimulating the central nervous system. It is mostly used in the treatment of narcolepsy (excessive sleepiness). Ritalin is a drug that should be taken under the control and follow-up of a doctor. Dose adjustment is made with blood tests applied at certain periods. It can have side effects such as loss of appetite, negative effects on growth in children, nausea, vomiting, dizziness and pain. In addition, in case of overdose or abrupt discontinuation of the drug without the knowledge of the doctor, there may be side effects such as depression, epileptic seizures, and mood swings. For this reason, it should be used in accordance with the instructions in accordance with the doctor’s recommendation.