 ADHD. It's the child who can't pay attention or sit still in school, right? The answer may be yes. Attention Deficit Hyperactivity Disorder, or ADHD, can be complicated, and it can last a lifetime. Up to 75% of children and adolescents with ADHD have at least one additional mental disorder that requires a comprehensive approach to treatment. Learn more at more2adhd.com. This message brought to you in partnership with ADDA, ACO, and CHAD.