ADHD Home > ADHD and Other Conditions

Oppositional Defiant Disorder
As many as one-third to one-half of all children with ADHD -- mostly boys -- have another condition, known as oppositional defiant disorder (ODD). These children are often defiant, stubborn, and non-compliant and may have outbursts of temper or become belligerent. They argue with adults and refuse to obey.
Conduct Disorder
About 20% to 40% of children with ADHD may eventually develop conduct disorder (CD), a more serious pattern of antisocial behavior. These children frequently lie or steal, fight with or bully others, and are at a real risk of getting into trouble at school or with the police. They are known to:
  • Violate the basic rights of other people
  • Are aggressive toward people and/or animals
  • Destroy property
  • Break into people's homes
  • Commit theft
  • Carry or use weapons
  • Engage in vandalism.


These children or teens are at greater risk for substance use experimentation and later, dependence and abuse. They need immediate help.

Anxiety and Depression
Some children with ADHD have co-occurring anxiety or depression. If the anxiety or depression is recognized and treated, the child will be better able to handle the problems that accompany ADHD. Conversely, effective treatment of ADHD can have a positive impact on anxiety as the child is better able to master academic tasks.
Bipolar Disorder
There are no accurate statistics on how many children with ADHD also have bipolar disorder. Differentiating between ADHD and bipolar disorder in childhood can be difficult. In its classic form, bipolar disorder is characterized by mood cycling between periods of intense highs and lows. In children, however, bipolar disorder often seems to be a rather chronic mood dysregulation with a mixture of elation, depression, and irritability. Furthermore, there are some symptoms that can be present both in ADHD and bipolar disorder, such as a high level of energy and a reduced need for sleep. Of the symptoms differentiating children with ADHD from those with bipolar disorder, elated mood and grandiosity of the bipolar child are distinguishing characteristics.
Written by/reviewed by:
Last reviewed by: Arthur Schoenstadt, MD
Last updated/reviewed:
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