What is the role of lab testing in the diagnosis of attention deficit hyperactivity disorder (ADHD)?

Updated: Oct 01, 2019
  • Author: Stephen Soreff, MD; Chief Editor: Glen L Xiong, MD  more...
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Answer

The diagnosis of attention deficit hyperactivity disorder (ADHD) is based on clinical evaluation. No laboratory-based medical tests are available to confirm the diagnosis.

Basic laboratory studies that may help confirm diagnosis and aid in treatment are as follows:

  • Serum CBC count with differential

  • Electrolyte levels

  • Liver function tests (before beginning stimulant therapy)

  • Thyroid function tests


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