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Excerpt 2
Hugh F. Johnston, MD

Attention-Deficit Hyperactivity Disorder in Adults: A Guide

(Excerpt 2)

Is there a specific test for ADHD? No, there are no specific blood tests, brain scans, or psychological tests that can establish a diagnosis of ADHD with certainty. This comes as a surprise to many, given the enormous technological advances in modern medicine. While there are tests that can measure certain aspects of a person�s ability to pay attention, a diagnosis of ADHD is ultimately based upon how behaviors affect the individuals success in life. If a case is unusually complex, most primary care doctors will request a consultation with a specialist such as a neurologist or psychiatrist to ensure that the diagnosis is correct.

In some cases doctors will recommend tests to help clarify a complex case or to rule out certain conditions that can mimic ADHD. For example, psychological tests are used if there is suspicion of a learning disorder and certain blood tests are used if there is concern about thyroid disease.