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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.
All of the following must be considered when interpreting clinical findings and are too extensive to be covered on this site: