In brief. "ADD" (attention deficit disorder) is an older term for what is now called ADHD, predominantly inattentive presentation. It describes people whose main difficulties are focus, memory, organisation and follow-through, without much outward restlessness. Because it is quiet, it is the presentation most often missed in childhood and picked up in adulthood. Assessment uses the same DSM-5-TR criteria and the same Australian guideline.
ADD versus ADHD: what changed
The term attention deficit disorder was introduced in 1980 in DSM-III, with or without hyperactivity. In 1987 the name changed to ADHD, and later editions defined subtypes, now called presentations. Today the formal diagnosis is always ADHD; "predominantly inattentive presentation" is the version that most closely matches what people mean by ADD.
Many people still say ADD because it feels more accurate for them. The "H" seems wrong when you have never been hyperactive. Clinically it is the same condition, assessed and treated the same way, with the same evidence base.
Two questions to start
Take the full self-testWHO adult ADHD screener. Scored on your device. A screen is not a diagnosis.
Symptoms of inattentive ADHD in adults
The DSM-5-TR lists nine inattentive symptoms. Adults need at least five, present for six months, beginning before age 12, and causing impairment in two or more settings. In everyday terms:
- Details slip: typos, missed steps, wrong dates, forms sent back.
- Attention drifts during reading, meetings, lectures or long conversations.
- People say you do not listen; you were there, but your mind was not.
- Tasks are started and abandoned. Bills, tax, emails and forms pile up.
- Organising is hard: time, space, priorities and sequence all blur.
- You avoid anything requiring sustained mental effort until it is urgent.
- Keys, phone, wallet, glasses and documents are regularly lost.
- Small distractions pull you off course, including your own thoughts.
- Appointments, birthdays and promised callbacks are forgotten.
Alongside the formal list, adults often describe mental fog, slow task initiation, "time blindness", and periods of hyperfocus on interesting things while important ones wait.
Why inattentive ADHD gets missed
It is quiet
Inattentive children do not disrupt classrooms. They stare out windows, lose homework and get called dreamy or lazy. Nobody refers a quiet child for assessment.
It looks like something else
Poor focus and low motivation are also features of depression, anxiety, poor sleep and burnout. Adults are often treated for those first.
Intelligence hides it
Bright people compensate. They cram, charm, improvise and work twice as long. Results look fine, so nobody sees the cost.
The stereotype is wrong
Public understanding of ADHD is still the bouncing boy. Adults who do not match that picture rule themselves out.
The predominantly inattentive presentation is more common in women and girls, which compounds the problem. See ADHD in women.
Sluggish cognitive tempo and other overlaps
Some people with inattentive symptoms also describe daydreaming, mental slowness and low energy. Researchers have studied this cluster under the name sluggish cognitive tempo, more recently called cognitive disengagement syndrome. It is not a DSM-5-TR diagnosis and its relationship to ADHD is still debated. What matters in practice is a full assessment that also considers sleep, mood, thyroid function, learning differences and autism, since these can produce or worsen inattention. If autistic traits are also present, see AuDHD.
How inattentive ADHD is assessed and treated
Assessment is the same as for any ADHD presentation and follows the AADPA 2022 guideline: a structured clinical interview, rating scales, childhood history and screening for co-occurring conditions. The clinician will want to know what you were like at primary school, even if nobody thought anything was wrong at the time. Old reports mentioning "could try harder" or "easily distracted" are surprisingly useful. Read more at ADHD assessment for adults.
Treatment options are the same too. Stimulant and non-stimulant medications are effective for inattentive symptoms, and prescribing rules vary by state (for example, Queensland GPs can diagnose and initiate since December 2025, while Western Australia remains limited). Therapy targets planning, task initiation, self-criticism and the anxiety that often develops around deadlines. Practical scaffolding such as external reminders, body doubling and breaking tasks into first steps makes a real difference. Assessment, diagnosis and prescribing are separate decisions, and you can choose non-medication support alone.
What Inner Help does
Inner Help provides online ADHD assessment and care for Australian adults, including those with the inattentive presentation. Assessments are done by ADHD-trained GPs with a psychiatrist medical director overseeing and reviewing files where a state requires it.
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 ADD still a diagnosis?
Not formally. Since 1987 the diagnosis has been ADHD. What people call ADD is now "ADHD, predominantly inattentive presentation". The name changed; the condition did not.
Can inattentive ADHD be treated without stimulants?
Yes. Non-stimulant medications, therapy, coaching and practical supports all help. Many people combine approaches. Your clinician will discuss what suits you, and prescribing is a separate decision from diagnosis.
Is inattentive ADHD milder than combined ADHD?
No. It is less visible, not less impairing. Adults with inattentive ADHD often have significant difficulties with work, finances and relationships, made worse by years without support.
Could it be depression or burnout instead?
Possibly, and it could be both. The distinguishing feature of ADHD is a lifelong pattern beginning in childhood. A proper assessment looks at timing, history and how symptoms behave when mood improves.
References
- Australian ADHD Professionals Association (AADPA), Australian Evidence-Based Clinical Practice Guideline for ADHD, 2022.
- American Psychiatric Association, DSM-5-TR: Attention-Deficit/Hyperactivity Disorder, predominantly inattentive presentation, 2022.
- Becker SP et al., Report of a Work Group on Sluggish Cognitive Tempo: Key Research Directions and a Consensus Change in Terminology to Cognitive Disengagement Syndrome, Journal of the American Academy of Child and Adolescent Psychiatry, 2023.
- Queensland Health, GP diagnosis and prescribing for ADHD: information for practitioners.
- Royal Australian and New Zealand College of Psychiatrists (RANZCP), ADHD resources.
Sources and review
- WHO Adult ADHD Self-Report Scale (ASRS v1.1)
- Australian ADHD Guideline (AADPA, 2022)
- MBS Online: Better Access items
- healthdirect: ADHD in adults
Last updated 2026-09-12.