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ADHD and anxiety

Around half of adults with ADHD also have an anxiety disorder, and anxiety is often diagnosed first while ADHD is missed.

In brief. ADHD and anxiety travel together: roughly half of adults with ADHD meet criteria for an anxiety disorder at some point. Anxiety is usually the one that gets diagnosed, because it is the one people complain about, while the ADHD underneath keeps generating the situations that make people anxious. Treating both, in the right order, changes the picture.

Why they overlap so much

Some of the overlap is shared biology. Much of it is lived experience. If your working memory drops things, you learn to worry constantly so nothing is forgotten. If you are often late, unprepared or in trouble, you learn to dread every meeting. If you have been criticised for decades, you scan for the next criticism. Anxiety in adult ADHD is frequently a rational adaptation to an unreliable brain, which is why treating the anxiety alone tends to give partial relief: the generator is still running.

Symptoms that look the same

  • Poor concentration: in anxiety, because worry occupies the mind; in ADHD, because attention itself is hard to regulate.
  • Restlessness: anxious tension versus ADHD's need for movement and stimulation.
  • Sleep problems: worry keeping you awake versus a racing, unbored ADHD brain and a delayed body clock.
  • Avoidance: of feared situations in anxiety, of boring or effortful tasks in ADHD.
  • Irritability, fatigue, overwhelm: common to both.
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Clues that point to each

Clinicians look at onset, pattern and what happens when the stressor lifts.

  • Onset. ADHD symptoms are present before age 12, even if they were called something else at the time. Anxiety can start at any age and often has an identifiable trigger.
  • The holiday test. Anxiety often eases when the pressure is off. ADHD inattention persists on the beach.
  • Interest. An anxious person can usually concentrate on something absorbing. A person with ADHD can too, but cannot reliably concentrate on something dull no matter how calm they are.
  • Content of worry. Anxiety worries about what might happen. ADHD anxiety is disproportionately about what you have forgotten, lost or failed to do.
  • Response to treatment. If anxiety treatment helps but the disorganisation, lateness and distractibility remain, ADHD is worth assessing.

Which to treat first

There is no single rule. If anxiety is severe, treating it first makes assessment and everything else easier. If the anxiety is clearly downstream of ADHD chaos, treating the ADHD often reduces anxiety without direct treatment. Many clinicians treat both in parallel: ADHD treatment plus cognitive behavioural therapy adapted for ADHD, which means shorter sessions, written summaries, and more focus on doing than on insight. The Australian ADHD Guideline recommends assessing for anxiety and other co-occurring conditions as part of every ADHD assessment.

A note on medication

People with anxiety are sometimes told ADHD medication will make it worse. For some it does, and for many it does the opposite, because a brain that is finally reliable has less to fear. This is an individual decision for a prescribing clinician who knows your history.

What Inner Help does

Our practitioners work with both conditions together rather than treating anxiety in isolation. If you have been treated for anxiety for years and still feel the ground is unreliable, the free ADHD self-test is a reasonable next step, and an assessment can settle the question.

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Frequently asked questions

Can anxiety be misdiagnosed as ADHD?

Yes, in both directions. Severe anxiety can produce ADHD-like inattention. A proper assessment takes a developmental history back to childhood and looks at symptoms across settings to separate the two.

Does treating ADHD cure the anxiety?

Sometimes it reduces it substantially, because the daily failures that fed it stop. Anxiety that has become a habit of mind usually also needs direct treatment.

Is it common to have both?

Very. Anxiety disorders are among the most common co-occurring conditions in adult ADHD, along with depression and sleep disorders.

Should I see a psychologist or psychiatrist?

A psychologist can assess ADHD and treat both conditions with therapy. If medication is part of the plan, a psychiatrist or an ADHD-trained GP (in states that permit it) is needed to prescribe.

Sources and review

About this pageWritten by Inner Help clinical content team against the sources listed below. How we write and review content. Nothing on this page is a diagnosis.

Last updated 2026-09-14.

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