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Ritalin is a prescribed medicine and central nervous system stimulant. It affects chemicals in the nerves and brain that contribute to impulse and hyperactivity control. Ritalin uses to treat attention deficit hyperactivity disorder (ADHD), attention deficit disorder (ADD), and narcolepsy. You can buy Ritalin online from any online medical store but Rxfarmaci is the best online store where you can buy Ritalin online. Provigil is also a medicine which you can use to treat the symptoms of excessive sleepiness and hyperactivity disorder.