ADHD or Anxiety? How to Tell Them Apart

Trouble concentrating, restlessness, a mind that will not settle at night: an adult with ADHD can describe every one of these, and so can an adult with an anxiety disorder. They are separate conditions with different treatments, and they often occur together. This page explains where they overlap, what tends to separate them, and how a clinician works out whether the answer is one, the other or both.

Where the symptoms overlap

The National Institute of Mental Health (NIMH) says that a diagnosis of generalized anxiety disorder (GAD) requires worry that is hard to control on most days for at least six months, plus at least three of these six symptoms: feeling restless or on edge, fatigue, trouble concentrating, irritability, muscle tension, and problems with sleep.

Three of those six also appear in NIMH's description of adult ADHD, which includes difficulty paying attention, getting easily distracted, and feelings of restlessness with a need for constant activity. NIMH adds that sleep problems affect up to 70% of adults with ADHD. On a symptom checklist, the two conditions can look almost the same. The overview of adult ADHD symptoms lists the full picture.

What tends to separate them

The ADHD rows come from the criteria as summarized by NIMH. The GAD rows come from NIMH's GAD publication. No single row settles the question. What a clinician looks for is the overall shape: did the trouble with focus and follow-through exist in grade school, long before worry took over? Does concentration stay poor on calm days? Or does it come and go with the worry?

How often they occur together

Very often. The National Comorbidity Survey Replication, published in 2006, found that 47.1% of adults with ADHD had an anxiety disorder in the previous 12 months, compared with 19.5% of adults without ADHD. Social phobia was the most common (29.3%), followed by specific phobia (22.7%); panic disorder (8.9%) and GAD (8.0%) were less common. Those figures come from adults aged 18 to 44, use older diagnostic definitions and carry wide margins of error, so treat them as approximate.

A 2026 meta-analysis pooled 58 studies with 18,821 adults and found that adults with ADHD scored higher on anxiety measures than adults without it, a medium-sized difference. The gap was smaller when the comparison group had other psychiatric conditions. The authors concluded that each condition should be screened for when the other is present.

A 2017 review in BMC Psychiatry adds two points that matter in practice. People who have both tend to have more severe anxiety that started earlier. And ADHD is often diagnosed later in people who also have anxiety, possibly because anxiety holds impulsive behavior in check, which makes the ADHD less visible. The UK's NICE guideline on ADHD likewise tells clinicians that adults with a mental health condition may have a higher prevalence of ADHD than the general population. When both are present, the page on ADHD and anxiety together covers what that looks like day to day.

When worry grows out of ADHD

Years of missed deadlines, forgotten appointments and last-minute rushes can leave a person constantly braced for the next mistake. Sometimes that worry amounts to an anxiety disorder that needs its own treatment. Sometimes it is an understandable reaction that eases once the ADHD is recognized and managed. The research used for this page does not put a number on how often anxiety in adults with ADHD is a consequence of the ADHD, so this page does not offer one. Telling the two apart is a judgment for the evaluating clinician.

Anxiety is not the only lookalike. Low mood, poor sleep and medical problems can produce the same complaints, which is why this guide also compares ADHD and depression, ADHD and trauma and ADHD and thyroid problems.

Why the distinction matters for treatment

• The treatments differ. NIMH describes GAD treatment as psychotherapy, medication or both, with cognitive behavioral therapy commonly used and antidepressants (SSRIs and SNRIs) and other anti-anxiety medications among the options. NIMH describes the most common ADHD treatments in adults as medication, usually stimulants, and psychotherapy.
• Anxiety treatment alone may leave ADHD untouched. The 2017 BMC Psychiatry review notes that serotonin-based medications alone would not be expected to improve ADHD symptoms. That is one reason concentration can stay poor after anxiety improves.
• Stimulants can affect anxiety. The FDA label for Adderall XR lists anxiety, agitation and insomnia among the most common adverse reactions in adults. A prescriber who knows about anxiety can watch for this.
• Anxiety does not rule out ADHD medication. NICE recommends offering people with ADHD and an anxiety disorder the same medication choices as other people with ADHD.
• Therapy for anxiety still helps adults with ADHD. A 2026 study of 13,693 adults with ADHD treated in England's NHS Talking Therapies found moderate to large reductions in anxiety and depression symptoms, although outcomes were somewhat less favorable than in matched adults without ADHD.

Dr. Shershow's adult ADHD evaluation looks at whether anxiety explains the symptoms, sits alongside ADHD, or both, and it ends with what was found and the treatment options that fit. The ADHD and anxiety evaluation page explains how that works for adults in New York and New Jersey.

What to bring to an evaluation

• Examples of focus or organization problems from elementary and high school, and report cards if you have them.
• Whether your concentration is poor even on days when you are not worried.
• When the worry began, what it is usually about, and how much of your day it takes.
• Any panic attacks, or situations you avoid because of fear.
• How you sleep, and whether racing thoughts or worry keep you awake.
• Alcohol, cannabis or other substance use, and every medication and supplement you take.
• Family history of ADHD, anxiety or depression.

A parent or sibling who remembers your childhood can fill in what you cannot. The guide to preparing for an adult ADHD evaluation has a longer checklist, and the diagnostic criteria in plain language explains what an evaluator has to establish.

When to talk to a clinician

If distraction, restlessness or worry has been costing you at work, at home or in relationships for months, these can be signs worth discussing with a clinician. You do not need to know in advance which condition it is. Sorting that out is the purpose of the evaluation.

A short screener such as the adult ADHD self-test can help you organize your thoughts before a visit, but it does not diagnose ADHD or anxiety. To see how an evaluation works, read about adult ADHD testing in NYC or adult ADHD testing in New Jersey. If anxiety ever turns into thoughts of suicide, call or text 988, the Suicide and Crisis Lifeline. In a life-threatening emergency, call 911.