WHAT IS CONCERTA® (methylphenidate HCl) extended-release tablets? CONCERTA ® is a central nervous system (CNS) stimulant prescription medicine used for the treatment of Attention Deficit and Hyperactivity Disorder (ADHD) in children 6 years of age and older and adults up to 65 years of age. Concerta is a stimulant ADHD medication used to treat symptoms of ADHD in children and adults. Learn about side effects, uses, dosages, and warnings. Overview: Methylphenidate is used to treat attention deficit hyperactivity disorder (ADHD) or narcolepsy. It may work by increasing natural chemicals in the brain called norepinephrine and. Concerta (methylphenidate) is a prescription drug approved to treat attention deficit hyperactivity disorder (ADHD). Concerta comes as an extended-release oral tablet. Detailed dosage guidelines and administration information for Concerta (methylphenidate hydrochloride). Includes dose adjustments, warnings and precautions. Concerta is used to treat attention deficit disorder (ADD) and attention deficit hyperactivity disorder (ADHD). Learn about side effects, interactions and indications. CONCERTA is a CNS stimulant indicated for the treatment of attention deficit hyperactivity disorder (ADHD) in patients aged 6 to 65 years old. (1).