Ritalin (methylphenidate) is a nervous system stimulant that’s commonly used to treat ADHD in adults and children. It’s a brand-name prescription medication that targets dopamine and norepinephrine in the brain to reduce common ADHD symptoms. Though Ritalin is a stimulant, when used in ADHD treatment, it may help with concentration, fidgeting, attention, and listening skills. Ritalin influences dopamine and norepinephrine activity in your brain. Ritalin increases the action of these neurotransmitters by blocking their reabsorption into your brain’s neurons. This medication has two dosages known as: Ritalin 10mg & Ritalin 20mg.