AuDHD: when ADHD and autism overlap
AuDHD means having both ADHD and autism.
In brief. AuDHD is a community term for being both autistic and having ADHD. Since 2013 the two can be diagnosed together, and they co-occur often: a large share of autistic people meet ADHD criteria, and many people with ADHD have autistic traits. The combination is not simply ADHD plus autism; the traits push and pull against each other, which can make each harder to spot. Assessment for both is possible and worthwhile.
What AuDHD means
AuDHD is not a formal diagnosis. It is shorthand, widely used by neurodivergent people, for having a diagnosis of autism and a diagnosis of ADHD at the same time. Until DSM-5 in 2013, clinicians were not permitted to diagnose ADHD in an autistic person, so many older adults were given one label when both applied.
Estimates vary, but studies commonly find that somewhere between a third and three quarters of autistic people also meet criteria for ADHD, and that autism is markedly more common among people with ADHD than in the general population. Whatever the exact figure, the overlap is large enough that anyone assessed for one should be screened for the other.
Two questions to start
Take the full self-testAQ-10 screener. Scored on your device. A screen is not a diagnosis.
How ADHD and autism interact
People often describe AuDHD as a tug of war. Autism tends toward routine, sameness and depth; ADHD tends toward novelty, spontaneity and breadth. Living with both can feel like wanting order and being unable to keep it, or craving stimulation and then being overwhelmed by it.
Routine versus novelty
You build systems and rituals (autism) and then abandon them when they become boring (ADHD). Structure is soothing until it is stifling.
Attention
Autistic monotropism and ADHD hyperfocus both produce deep absorption, but ADHD adds drifting, task-switching and forgetting the thing you were absorbed in yesterday.
Social life
Autism can make reading social cues effortful; ADHD adds interrupting and impulsive over-sharing. Masking both is exhausting and often leads to burnout.
Sensory and emotional
Sensory sensitivity, meltdowns and shutdowns (autism) sit alongside emotional impulsivity and rejection sensitivity (ADHD). Regulation takes deliberate effort.
Because the traits can cancel out on the surface, an AuDHD person may look "mildly" affected by each while struggling considerably with the combination. A person with ADHD-driven sociability may not fit the autism stereotype; an autistic person's structure may hide their ADHD disorganisation.
Why one diagnosis can hide the other
Clinicians trained mainly in one condition may stop looking once they find it. Someone diagnosed with ADHD who does not respond as expected to medication, or who still struggles with change, sensory load and social exhaustion, may have unrecognised autism. Someone diagnosed autistic whose executive functioning difficulties are put down to autism alone may be missing ADHD that could respond to treatment.
Women and gender-diverse people are missed in both conditions at higher rates, so AuDHD in women is doubly under-recognised. See ADHD in women.
Late-diagnosed adults often say the second diagnosis explained what the first one could not. That is a good reason to ask for both to be considered, rather than assuming one label has covered everything.
Assessment for both ADHD and autism
ADHD and autism are assessed differently. An ADHD assessment follows the AADPA 2022 guideline and DSM-5-TR criteria: symptoms before age 12, ongoing, impairing in two or more settings. It can be done by ADHD-trained GPs, psychiatrists or paediatricians depending on your state. Read ADHD assessment for adults.
Adult autism assessment in Australia is usually done by a psychologist or psychiatrist with autism expertise, often over several sessions, using developmental history and structured tools. It is not a medical prescribing decision, so it sits outside the state stimulant rules. Screening tools such as the AQ-10 and RAADS-R can indicate whether a full autism assessment is worth pursuing; try our free autism test.
A sensible sequence for someone who suspects AuDHD is to complete both screeners, take the results to an ADHD assessment (where autism screening is part of the co-occurring conditions check), and then pursue formal autism assessment if indicated. Medication decisions are made separately from diagnosis and take autism into account, since some autistic people are more sensitive to stimulant side effects.
Therapy and support for AuDHD
Standard therapy is not always a good fit. Approaches that assume neurotypical social processing, or that push a person to "just build habits", can feel like being told to try harder at the thing that is hard. Neurodivergent-informed therapy starts from how your brain actually works.
- Building external structure that tolerates change, rather than rigid routines that break.
- Sensory and energy budgeting to prevent burnout, meltdowns and shutdowns.
- Unmasking safely, and grieving the years of not knowing.
- Working with rejection sensitivity, anxiety and low mood that so often accompany both conditions.
- Practical help with work, study and relationships, including self-advocacy.
Learn more about our approach at therapy. If you are not sure whether ADHD, autism or both fit, the neurodivergent test and the neurodivergent hub are good starting points.
What Inner Help does
Inner Help provides online ADHD assessment and care across Australia. Assessments are done by ADHD-trained GPs, with a psychiatrist medical director overseeing and reviewing files where a state requires it. Our assessments screen for autism and other co-occurring conditions, and we will tell you plainly if a formal autism assessment is worth pursuing. Assessment, diagnosis and prescribing are separate decisions.
ADHD assessment with Inner Help opens state by state in 2026: GP-led with psychiatrist oversight, workup at a clinic near you, price and process published in full before it opens. Join the waitlist. You do not need a diagnosis to start therapy now.
Get matched, or start with the free self-test.
A practitioner who understands neurodivergence, matched when one has availability. Or two minutes on the self-test first, scored on your device.
Frequently asked questions
Is AuDHD an official diagnosis?
No. It is a community term for having both an autism diagnosis and an ADHD diagnosis. Clinically the two are recorded separately.
Can Inner Help diagnose autism?
Our ADHD assessments include screening for autism and will tell you whether a formal autism assessment is recommended. Formal adult autism diagnosis is done by clinicians with autism expertise, usually psychologists or psychiatrists.
Does ADHD medication work if you are also autistic?
Often yes, for the ADHD symptoms. Some autistic people are more sensitive to side effects, so dosing tends to start low and go slow. This is a prescribing decision made with your clinician, separately from diagnosis.
Which should I get assessed for first?
Whichever is causing the most difficulty now, or ADHD first if treatment might help sooner. Take both free screeners, the ADHD test and the autism test, and bring the results to your assessment.
References
- Australian ADHD Professionals Association (AADPA), Australian Evidence-Based Clinical Practice Guideline for ADHD, 2022.
- Autism CRC, National Guideline for the Assessment and Diagnosis of Autism in Australia, 2023 update.
- American Psychiatric Association, DSM-5-TR, 2022.
- Rong Y et al., Prevalence of attention-deficit/hyperactivity disorder in individuals with autism spectrum disorder: a meta-analysis, Research in Autism Spectrum Disorders, 2021.
- Hours C, Recasens C, Baleyte JM, ASD and ADHD Comorbidity: What Are We Talking About?, Frontiers in Psychiatry, 2022.
Sources and review
Last updated 2026-09-12.