Adult ADHD; diagnostic considerations

Adult ADHD has become a prominent topic in public conversation, and with good reason — it is a common and often under-recognized condition that can significantly affect work, relationships, and quality of life. At the same time, the increased attention has brought considerable confusion about what ADHD actually is, who has it, and what a rigorous diagnostic process looks like.

What ADHD actually is

Attention-deficit/hyperactivity disorder is a neurodevelopmental condition — originating in the developing brain and present from childhood, even when not recognized until adulthood. It is characterized by persistent patterns of inattention, hyperactivity, and impulsivity that cause impairment across multiple areas of functioning. In adults, the predominantly inattentive presentation is most common and most frequently missed. Rather than the classic image of the hyperactive child, adults may present with chronic difficulty sustaining attention, poor organization, forgetfulness, and a persistent sense of underachievement relative to their perceived capacity.

Why diagnosis requires careful evaluation

The symptoms of ADHD — difficulty concentrating, restlessness, forgetfulness, impulsivity — are not unique to ADHD. They can be caused or worsened by anxiety, depression, sleep deprivation, trauma, thyroid dysfunction, substance use, and other conditions. A positive screening questionnaire identifies that symptoms are present; it does not establish that ADHD is the correct explanation. Distinguishing ADHD from its imitators requires a clinical interview broad enough to evaluate the full differential diagnosis.

What a thorough evaluation looks like

In my practice, an ADHD evaluation typically takes two to three 90-minute sessions. The components include: a detailed developmental history covering childhood functioning and academic performance; systematic review of all DSM-5 ADHD symptoms with specific examples from daily life; assessment of functional impairment across work, relationships, and day-to-day functioning; screening for conditions that overlap with or mimic ADHD; collateral information from a partner or family member when available; and substance use history, which is relevant both diagnostically and for treatment planning.

After the evaluation

If ADHD is confirmed, we discuss treatment options. Medication — most commonly a stimulant — is often the most effective first-line treatment, but behavioral strategies, organizational systems, and understanding how ADHD interacts with anxiety and self-criticism are often equally important. For many adults, a diagnosis also carries psychological weight — years of feeling lazy or undisciplined leave a residue of shame that does not dissolve with a diagnosis alone. This is where psychodynamic psychotherapy alongside medication can be particularly valuable.