ADHD and anxiety disorders frequently coexist. Per CHADD and substantial published research, adults with ADHD have approximately 2-3 times the prevalence of anxiety disorders compared to the general population. This overlap creates diagnostic and treatment complexity that benefits from specialist evaluation.
Treating both conditions requires understanding how they interact — and how treatment of one affects the other. Treating only ADHD or only anxiety often produces incomplete response when both are present.
The Comorbidity Picture
Per published research summarized in the major 2018 Lancet Psychiatry network meta-analysis and subsequent literature:
- Approximately 25-50% of adults with ADHD have a comorbid anxiety disorder
- The comorbidity is bidirectional — both increase risk for the other
- Genetic studies suggest shared neurobiological factors
- Coexisting conditions often complicate diagnosis and treatment of each
How They Interact
ADHD symptoms producing anxiety
- Chronic underperformance triggering anxiety about future failure
- Deadline catastrophes producing acute anxiety episodes
- Social difficulties from impulsivity producing social anxiety
- Executive function failures producing pervasive worry about competence
- Memory issues triggering anxiety about responsibilities
Anxiety affecting ADHD symptoms
- Anxiety impairs working memory and concentration — overlapping with ADHD presentation
- Avoidance from anxiety mimics ADHD avoidance of demanding tasks
- Anxiety-driven hypervigilance can mask or mimic attention difficulties
- Sleep disruption from anxiety worsens ADHD symptoms
Diagnostic Complexity
Several considerations:
- ADHD alone can produce anxiety-like symptoms that aren’t a separate anxiety disorder
- Anxiety alone can produce attention symptoms that aren’t ADHD
- Both can coexist as separate conditions requiring separate treatment
- Specialty evaluation often required to distinguish
Comprehensive ADHD evaluation should systematically assess anxiety. Per CDC MMWR data (2024) on adult ADHD, women in particular are often “treated for anxiety or depression that developed secondarily to ADHD” — meaning the ADHD goes unrecognized while anxiety treatment proceeds without full effect.
Treatment Sequencing
When both conditions are present, treatment sequence matters:
Approach 1: Treat anxiety first if severe
When anxiety is dominant clinical picture and severe enough to impair functioning more than ADHD, treating anxiety first can be appropriate. Sometimes ADHD symptoms improve once anxiety is reduced — clarifying whether separate ADHD treatment is needed.
Approach 2: Treat ADHD first if primary
When ADHD is the dominant condition and anxiety appears secondary, treating ADHD first can resolve much of the apparent anxiety — chronic underperformance anxiety often improves substantially when executive function does.
Approach 3: Treat both simultaneously
For many patients, both conditions warrant treatment. SSRIs for anxiety plus stimulant or non-stimulant for ADHD. Coordination important — stimulants can occasionally worsen anxiety initially.
Medication Considerations
Stimulants and anxiety
Stimulants (methylphenidate, amphetamines) can either help or worsen anxiety:
- Can worsen acute anxiety initially, particularly at higher doses
- Can improve anxiety long-term when ADHD-driven anxiety resolves
- Starting at low doses and titrating cautiously typically works better when anxiety present
- Long-acting formulations often better tolerated than short-acting in anxious patients
Non-stimulant ADHD medications
Sometimes preferred when anxiety is significant concern:
- Atomoxetine — Non-stimulant; less risk of worsening anxiety
- Guanfacine extended-release — Can help anxiety and ADHD simultaneously
- Clonidine extended-release — Similar role
SSRIs and SNRIs
Standard treatment for anxiety; don’t directly treat ADHD but can reduce anxiety component allowing better ADHD treatment.
Avoiding benzodiazepines
Per 2025 Joint Clinical Practice Guideline on Benzodiazepine Tapering, long-term benzodiazepine use is generally avoided — particularly important in ADHD where cognitive effects can worsen executive function.
Therapy Integration
CBT addresses both conditions — but ADHD-modified CBT often works better than standard CBT for patients with both. ADHD coaching can complement therapy by building executive function skills.
Source: CHADD; published comorbidity research.
Missed comorbidity
Many adults receive treatment for anxiety or ADHD alone when both are present — leading to incomplete response and ongoing impairment.
Integrated evaluation
Dr. Farkas evaluates for both conditions systematically and develops integrated treatment plans matching the specific clinical picture.
Comprehensive response
Treating both conditions when present typically produces substantially better outcomes than treating either alone.
Common Questions About ADHD and Anxiety
Will my ADHD medication make my anxiety worse?
Sometimes initially. Many patients find that stimulant treatment ultimately improves anxiety once ADHD-driven anxiety resolves. Starting at low doses and titrating carefully — with attention to anxiety response — often works well. Non-stimulant alternatives exist when stimulants don’t fit.
Can SSRIs treat my ADHD?
No — SSRIs don’t directly treat ADHD. They treat coexisting anxiety or depression, which can clarify the actual ADHD picture and improve function. ADHD itself typically requires ADHD-specific treatment.
Which should I treat first?
Depends on which is more impairing. Severe anxiety often warrants treatment first. Severe ADHD with secondary anxiety often warrants ADHD treatment first. Sometimes simultaneous treatment makes sense. See our related articles on adult ADHD and anxiety disorders.
Can I have both even if I never knew about my ADHD?
Absolutely. Many adults — particularly women — are diagnosed with ADHD only after years of anxiety treatment that didn’t fully resolve their difficulties. Per CDC data, women are particularly likely to receive ADHD diagnosis in adulthood after initial anxiety or depression treatment.