Ritalin 20mg (methylphenidate) is a stimulant medication prescribed for ADHD and narcolepsy. It enhances concentration, mental alertness, and impulse control by stimulating brain activity in targeted regions. Ritalin 20mg is typically used in patients requiring moderate symptom management. Doctors often adjust dosage based on individual response, ensuring balanced treatment benefits while minimizing side effects such as restlessness or insomnia.