Key takeaways:
Attention-deficit hyperactivity disorder (ADHD), generalized anxiety disorder (GAD), and major depression can have similar symptoms.
It’s important to get assessed by a mental health professional to get an accurate diagnosis and understand the best treatment for you.
Medication is the first-choice treatment for ADHD, but you might get better results by combining it with therapy.
Attention-deficit hyperactivity disorder (ADHD) is a common mental health condition where people may find it easy to get distracted or it may seem hard to focus. People with ADHD have problems with attention, overly active behavior, or both. But did you know that ADHD symptoms can mimic those of other common mental health conditions, like depression and anxiety?
Just to make it more complicated, it’s possible to have ADHD and another mental health condition at the same time. In fact, almost 1 in 5 adults with ADHD also have major depression. And almost 1 in 2 adults with ADHD have an anxiety disorder.
This means that if you’re having trouble with focus and concentration, it’s possible that you could have ADHD, anxiety, depression, or all three — especially if you’re having other symptoms. Knowing how these conditions are similar and how they’re different can help you have a meaningful discussion with a healthcare professional. Let’s take a closer look at how they make a diagnosis and treat these common conditions.
It’s possible to confuse ADHD, generalized anxiety disorder (GAD), and major depression because they can have some of the same symptoms. Symptoms that all three conditions have in common are:
Physical agitation or restlessness
Difficulty concentrating or focusing
Irritability
Both major depression and anxiety can cause worry, tension, or restlessness. These symptoms may then lead to distraction, concentration issues, and trouble focusing on details. Decreased ability to concentrate is a possible symptom of a depressive episode as well. Depressed mood and lack of energy can make it hard to follow through with responsibilities. This might lead you to think you have ADHD.
Symptoms | ADHD | Anxiety | Depression |
Restlessness | ✔ | ✔ | ✔ |
Difficulty concentrating | ✔ | ✔ | ✔ |
Irritability | ✔ | ✔ | ✔ |
Loss of interest in people or hobbies | ✔ | ||
Changes in appetite (with meds) | ✔ | ✔ | |
Hopelessness | ✔ | ||
Impulsivity | ✔ | ||
Feeling overwhelmed | ✔ | ✔ | ✔ |
If you have general anxiety disorder (GAD), worry and distraction can keep you from hearing someone when they speak to you. GAD can also lead to excessive talking if you feel nervous during awkward silences. This can make getting the correct diagnosis difficult.
Given their similarities, it can be hard to tell the difference between anxiety and ADHD. One key thing to know about ADHD is that it starts in childhood. Several symptoms present themselves before the age of 12, even if you don’t get an ADHD diagnosis until later in life.
But anxiety in childhood may also look like ADHD. For example, anxiety symptoms like worry and rumination often cause restlessness in children.
Getting an adult ADHD diagnosis: It’s common to miss a diagnosis of adult ADHD, mistaking it for anxiety or depression. This nurse was surprised to find out she had ADHD, a condition she thought occurs only in children.
Why are stimulants used to treat hyperactivity? Here are key things you need to know about Adderall and other common ADHD medications.
Treatment for anxiety: Did you know that symptoms of anxiety and adult ADHD can overlap, and both conditions can happen at the same time? Learn more about different treatments for anxiety disorders.
ADHD and depression can share some of the same symptoms. This overlap can sometimes make it difficult to figure out if a person has depression or ADHD. Some of the symptoms that depression and ADHD share are:
Inability to focus on tasks
Relationship difficulties
Restlessness
Feeling overwhelmed
There are some symptoms that set depression apart from ADHD. Key differences that mark depression are:
Thinking about death or suicide often
Feeling hopeless
Feeling sad, worthless, or guilty frequently and for long periods of time
Loss of interest in hobbies and being with others
Remember, depression and ADHD can happen at the same time in a person. A thorough history and review of symptoms with a healthcare professional can help determine a correct diagnosis.
Maybe. Up to almost 90% of adults with ADHD also have at least one other mental health condition — especially mood and anxiety disorders. These conditions can occur at the same time. But experts don’t know whether ADHD actually causes anxiety or depression.
In some cases, ADHD could cause symptoms that look like anxiety or depression. For instance, when a project deadline approaches, ADHD can lead to feelings of failure or guilt, or it can cause nervousness and worry.
Evaluating symptoms of ADHD — and to determine if you have ADHD, anxiety, or depression — generally occurs in two main stages. The first is an initial assessment. The second stage, if needed, is psychological testing.
A mental health professional conducts an initial assessment in your first few sessions. They may have you complete questionnaires before your appointment. These questionnaires ask you about your different symptoms and experiences.
If you have major depression or an anxiety disorder, a healthcare professional will likely recommend treating those first. This is because reducing depression or anxiety could also reduce inattention and hyperactivity. If your depression or anxiety lowers and you still have problems with ADHD symptoms, the next step is psychological testing.
A psychologist can test you for ADHD. Licensed psychologists have a doctorate degree and specialized training in testing and evaluation. Testing includes gathering information from you and other people in your life, such as parents, teachers, and friends. You will also complete tests that measure you on things such as attention span and task completion.
Once they have gathered all this information, the psychologist writes a report. This report will include their diagnosis and treatment recommendations. To locate a psychologist who does testing, ask your current therapist or a healthcare professional for a referral. Or you can search an online database like Psychology Today. Enter your location, and search for mental health professionals who perform psychological testing and evaluation.
For ADHD, medication is often the first-choice treatment. At the same time, psychotherapy for ADHD can help you learn new tools like organizational and coping skills. Medication can also help you get the most out of therapy because you will be able to focus better in sessions.
For major depression and anxiety, a healthcare professional may suggest psychotherapy, medication, or both based on your individual situation.
Treating ADHD may help reduce depression and anxiety. Being able to concentrate and get tasks completed seems to reduce stress burden in people with depression or anxiety who also have ADHD.
There’s not really a single medication that effectively treats ADHD, anxiety, and depression at the same time. However, there are very good medications that may alleviate some symptoms that overlap. For example, some antidepressants can reduce anxiety symptoms, and stimulants may be used as an add-on medication for people with lingering symptoms of anxiety or depression.
Experts aren’t certain why people with ADHD are more likely to get anxiety or depression. One thought is that the brain chemistry is altered in some way, making a person susceptible to many different mood disorders. Another idea is that when someone persistently underperforms due to the inability to concentrate, over time they begin to feel depressed or anxious about failing again. Early treatment for ADHD can help reduce the risk of developing depression or anxiety later on.
It can be easy to confuse anxiety or major depression with ADHD because they share some symptoms. However, they are different conditions. That’s why it’s important to get a full assessment by a mental health professional. An experienced healthcare professional can help you get the most accurate diagnosis and the best treatment plan for you.
American Psychological Association. (2022). Understanding psychological testing and assessment.
Attention Deficit Disorder Association. (2022). Understanding ADHD.
Centers for Disease Control and Prevention. (2024). Diagnosing ADHD.
Centers for Disease Control and Prevention. (2024). Symptoms of ADHD.
Charach, A., et al. (2013). Enhancing ADHD medication adherence: Challenges and opportunities. Current Psychiatry Reports.
Children and Adults with Attention-Deficit/Hyperactivity Disorder. (n.d.). ADHD and co-occurring conditions.
Cuijpers, P., et al. (2014). Adding psychotherapy to antidepressant medication in depression and anxiety disorders: A meta-analysis. Focus: The Journal of Lifelong Learning in Psychiatry.
Feifel, D. (2007). ADHD in adults: The invisible rhinoceros. Psychiatry.
Fleischmann, A., et al. (2013). Online narratives by adults with AD(H)D who were diagnosed in adulthood. Learning Disability Quarterly.
Hesslinger, B., et al. (2014). Psychotherapy of attention deficit hyperactivity disorder in adults. European Archives of Psychiatry and Clinical Neuroscience.
Jarrett, C. (2020). Cognitive load theory: Explaining our fight for focus. BBC.
McIntosh, D., et al. (2009). Adult ADHD and comorbid depression: A consensus-derived diagnostic algorithm for ADHD. Neuropsychiatric Disease and Treatment.
Quintana, H., et al. (2007). Comparison of a standard psychiatric evaluation to rating scales and EEG in the differential diagnosis of attention-deficit/hyperactivity disorder. Psychiatry Research.
Sobanski, E. (2006). Psychiatric comorbidity in adults with attention-deficit/hyperactivity disorder (ADHD). European Archives of Psychiatry and Clinical Neuroscience.
Substance Abuse and Mental Health Services Administration. (2016). Table 3.15: DSM-IV to DSM-5 generalized anxiety disorder comparison. Impact of the DSM-IV to DSM-5 Changes on the National Survey on Drug Use and Health.
Substance Abuse and Mental Health Services Administration. (2016). Table 9: DSM-IV to DSM-5 major depressive episode/disorder comparison. DSM-5 Changes: Implications for Child Serious Emotional Disturbance.
Zhang, Y., et al. (2025). Effects of ADHD and ADHD medications on depression and anxiety in children and adolescents: A systematic review and meta-analysis. Journal of Psychiatric Research.