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Attention-deficit hyperactivity disorder (ADHD) is a mental disorder that is characterized by difficulty paying attention, hyperactivity, and impulsivity. It is a general term for any of the three subtypes of ADHD (inattentive, hyperactive-impulsive, or combined). Symptoms of ADHD may include difficulty focusing, restlessness, impulsivity, and difficulty controlling behavior. Treatment for ADHD may include medication, psychotherapy, and lifestyle changes.
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