Ritalin is the brand name for generic methylphenidate medicine. Ritalin belongs to the central nervous system (CNS). It was approved for medical use in the United States in 1955. It is available in both generic and trade medication. It is helpful for the treatment of narcolepsy and attention deficit hyperactivity disorder. It is the first-line treatment for ADHD in the United States. It is the most common effect of dry mouth, nervousness or anxiety, insomnia, etc. Ophthalmologic effects include dry eyes, blurred vision, diplopia, and mydriasis in rare cases.