Other Disorders Common With ADHD
Children with ADHD often have other behavior disorders, such as:

Learning Disabilities
While ADHD itself can cause difficulties with learning, a learning disability is a specific learning difference not caused by ADHD. More than half of all children with ADHD have learning disabilities. These children can be as smart or smarter than other children, but they may have difficulty reading or doing math.

ODD (Oppositional-defiant Disorder)
Children with ODD may be angry, argumentative, lose their temper, refuse to follow rules, and deliberately annoy others.

CD (Conduct Disorder)
Characteristic behaviors of CD include deliberately destroying property, setting fires, lying, stealing, running away, skipping school, or being cruel to animals or others.

Depression
Children with this mood disorder may have difficulty sleeping or sleep too much, lose their appetite, criticize themselves harshly, withdraw from others, or talk about death.

Mania/Bipolar Disorder
This disorder also affects mood and can cause children to be extremely happy and energetic for periods of time and then become depressed.

Anxiety Disorders
Characteristics include excessive worry, edginess, and fatigue.

Tics and Tourette's Syndrome
A small number of children with ADHD have tics or Tourette's syndrome, which causes them to make sudden, involuntary movements or sounds.

Substance Abuse
As children with ADHD get older, they are at greater risk for abusing drugs or alcohol. They often smoke cigarettes at a very early age and are twice as likely to become addicted to nicotine.