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Can ADHD Be Misdiagnosed as Anxiety or Depression? 

Posted
Updated
ByMy Patient Advice
Author: Avery Lombardi, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Yes, ADHD can be misdiagnosed as anxiety or depression, especially in adults. The overlapping symptoms such as trouble concentrating, restlessness, or emotional overwhelm can make it difficult to distinguish between these conditions. This is why a careful differential diagnosis is essential. Without it, individuals may receive treatment for the wrong issue, leaving the core symptoms of ADHD unaddressed. 

Both anxiety and depression can mask or mimic the presentation of ADHD. For example, someone with ADHD might feel anxious because they’re constantly behind on tasks or forget important deadlines. Likewise, long-term struggles with focus and underachievement can lead to feelings of low self-worth and symptoms of depression. In these cases, ADHD is the root cause, but what gets diagnosed are the comorbid disorders that appear on the surface. 

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Why ADHD Is Sometimes Misdiagnosed 

ADHD can be misdiagnosed as anxiety or depression due to the following reasons:  

Symptom Overlap  

Difficulty focusing, fatigue, irritability, and forgetfulness are common in both ADHD and mood disorders, which can blur the diagnostic picture. 

Comorbid Disorders  

Many individuals with ADHD also have anxiety or depression, making it harder to identify the primary condition without a thorough assessment. 

Missed Childhood Signs  

Especially in adults, undiagnosed ADHD may be overlooked because childhood symptoms were never formally identified, leading to a default diagnosis of anxiety or depression. 

In conclusion, to ensure accurate diagnosis, a full evaluation should include a review of childhood symptoms, behavioural patterns, and a comprehensive mental health history. 

Visit providers like ADHD Certify for personal consultations and expert guidance tailored to your unique situation. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Signs, Symptoms, and Self-identification of ADHD.  

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Avery Lombardi, MSc
Author

Avery Lombardi is a clinical psychologist with a Master’s in Clinical Psychology and a Bachelor’s in Psychology. She has professional experience in psychological assessment, evidence-based therapy, and research, working with both child and adult populations. Avery has provided clinical services in hospital, educational, and community settings, delivering interventions such as CBT, DBT, and tailored treatment plans for conditions including anxiety, depression, and developmental disorders. She has also contributed to research on self-stigma, self-esteem, and medication adherence in psychotic patients, and has created educational content on ADHD, treatment options, and daily coping strategies.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy. 

Dr. Rebecca Fernandez, MBBS
Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy. 

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