What is Attention Deficit Hyperactivity Disorder (ADHD)?
Attention-deficit hyperactivity disorder, often called ADHD, is a common neurodevelopmental condition that affects attention, activity levels, impulse control, organisation, and emotional regulation.
ADHD often begins in childhood, but it can continue into adult life. For some people, it is not recognised until adulthood, especially when symptoms have been less obvious or have been masked for many years.
Whether you are a parent wondering about your child, or an adult who has always found focus, organisation, restlessness, or time management difficult, this page explains what ADHD can look like, what may contribute to it, how it is diagnosed, and what support may be available in New Zealand.
This page is for general education only and is not medical advice. If you are concerned about your own health or your child’s health, please speak with a qualified healthcare professional.
ADHD symptoms
ADHD symptoms are usually grouped into two main areas:
- Inattention
- Hyperactivity and impulsivity
Some people mainly experience inattentive symptoms. Others mainly experience hyperactivity and impulsivity. Many people experience a combination of both.
The core symptoms can be present across childhood, adolescence, and adulthood, but they may look different at different stages of life. For example, physical restlessness may be more obvious in children, while adults may experience it more as internal restlessness, racing thoughts, or difficulty switching off.
Signs of inattention
Signs of inattention may include:
- Difficulty staying focused on tasks, conversations, reading, or study
- Making mistakes because details are missed
- Being easily distracted, even when trying hard to concentrate
- Starting tasks but finding it difficult to finish them
- Struggling with organisation, planning, or time management
- Frequently losing everyday items, such as keys, phones, school items, or paperwork
- Avoiding tasks that require sustained mental effort
- Forgetting appointments, commitments, chores, or important steps in a task
Signs of hyperactivity and impulsivity
Signs of hyperactivity and impulsivity may include:
- Feeling restless or finding it hard to sit still
- Fidgeting or needing to move often
- Finding it difficult to relax or take part in quiet activities
- Talking more than intended
- Interrupting others or finishing other people’s sentences
- Feeling impatient or finding it hard to wait
- Making quick decisions without fully considering the outcome
How ADHD can look at different ages
In children, ADHD may be more visible at school or home. A child may find it hard to stay seated, wait their turn, follow instructions, complete schoolwork, or manage big emotions.
In adults, ADHD can be less obvious from the outside. It may show up as disorganisation, procrastination, forgetfulness, difficulty managing time, emotional overwhelm, restlessness, or feeling constantly behind.
ADHD is also often under-recognised in women and girls. Symptoms may present more as inattention, daydreaming, internal restlessness, anxiety, or emotional sensitivity rather than visible hyperactivity. This can mean some people are not assessed or diagnosed until adulthood.
Everyone can feel distracted, forgetful, or restless from time to time. With ADHD, these patterns are persistent, usually show up in more than one area of life, and interfere with day-to-day functioning.
What causes ADHD?
There is no single cause of ADHD. Current understanding suggests ADHD is linked to differences in brain development and brain chemistry, with genetics playing a strong role.
ADHD often runs in families. If a close relative has ADHD, the chance of another family member having it is higher.
Factors that may be linked with an increased chance of ADHD include:
- Genetics and family history
- Premature birth
- Low birth weight
- Exposure during pregnancy to alcohol, smoking, or some environmental toxins
It is also important to be clear about what does not cause ADHD. ADHD is not caused by poor parenting, too much sugar, too much screen time, or a lack of discipline. These things may affect behaviour, routines, sleep, or stress levels, but they do not cause ADHD.
Contact us to find out moreHow is ADHD diagnosed?
There is no single blood test, brain scan, or online quiz that can diagnose ADHD.
ADHD is diagnosed through a clinical assessment by a suitably qualified and experienced health professional. This assessment looks at symptoms, personal history, developmental history, and how symptoms affect daily life.
Clinicians use recognised diagnostic criteria, such as the DSM-5-TR. In general terms, an ADHD diagnosis considers whether:
- Symptoms of inattention and/or hyperactivity and impulsivity are present
- Symptoms have been present for at least six months
- Several symptoms were present before age 12
- Symptoms occur in more than one setting, such as home, school, study, or work
- Symptoms clearly affect daily functioning
- Symptoms are not better explained by another condition
For children, information from parents, caregivers, and teachers is often important. For adults, it can be helpful to gather information from family members, school reports, or people who knew them during childhood, as ADHD symptoms begin earlier in life.
Getting assessed in New Zealand
If you are concerned about ADHD, a good first step is to speak with your GP or nurse practitioner. They can talk through what you have noticed, consider other possible explanations, and guide you on the next step.
For adults, screening tools such as the Adult ADHD Self-Report Scale, or ASRS, may be used as part of the process. A screening tool can support a conversation, but it does not replace a full assessment or provide a formal diagnosis.
A referral may then be made to a health professional with experience in ADHD assessment and diagnosis. Depending on your age, needs, and local services, this may include a psychiatrist, paediatrician, psychologist, GP, nurse practitioner, or another suitably competent clinician.
From 1 February 2026, changes in New Zealand allow specialist GPs and nurse practitioners working within their area of practice to diagnose and prescribe for adults with ADHD. Nurse practitioners working in paediatric or mental health services may also be able to do this for children and adolescents.
These changes are being introduced gradually, and not every GP or nurse practitioner will offer ADHD assessment or prescribing services. It is best to check with your practice or local provider about what is available.
Stimulant medicines for ADHD remain regulated, and prescribing must follow New Zealand’s clinical and funding requirements.
It is best not to rely on self-diagnosis from an online quiz. ADHD can share symptoms with anxiety, depression, trauma, sleep problems, substance use, learning differences, and other neurodevelopmental conditions. A proper assessment helps make sure the right support is offered.
Where we fit in
Our doctors do not diagnose ADHD or prescribe ADHD medicines. Assessment, diagnosis and stimulant treatment sit with your GP, nurse practitioner or specialist, as described above.
If you are exploring whether medicinal cannabis could be appropriate for you, our doctors can talk this through with you as part of your wider care. A consultation is a conversation about your situation and your options, not a commitment to treatment.
ADHD and Anxiety
ADHD and anxiety can look similar from the outside. Both can involve restlessness, difficulty concentrating, irritability, sleep disruption, and a busy mind. They can also occur together.
The difference is often in what is driving the difficulty.
With ADHD, attention and organisation difficulties are usually ongoing and linked to how the brain regulates focus, motivation, impulses, and time.
With anxiety, concentration problems may be more connected to worry, fear, or a mind that is focused on what might go wrong.
Because ADHD and anxiety can overlap, it is important for a clinician to look at the full picture. This helps avoid missing one condition or treating only part of what is going on.
ADHD and Autism
ADHD and autism are both neurodevelopmental conditions. They can share some features, including differences with attention, emotional regulation, sensory experiences, routines, and social situations. They can also occur together.
In ADHD, attention may shift quickly because of distractibility, restlessness, or a pull toward new stimulation.
In autism, attention may be more focused on specific interests, routines, or patterns, with difficulty shifting away from them. Autism also commonly involves differences in social communication, sensory processing, and a need for predictability.
If someone has traits of both ADHD and autism, an assessment will usually look at their developmental history, current symptoms, strengths, challenges, and how these affect daily life.
Treatment and management options
ADHD can often be managed well with the right combination of support. Treatment should be tailored to the person, their age, their goals, and how much symptoms are affecting daily life.
Management may include medication, psychological support, practical strategies, school or workplace adjustments, and support for any coexisting conditions.
Medication
For some children and adults, medication may be part of ADHD treatment. In New Zealand, this may include stimulant medicines such as methylphenidate, dexamfetamine, or lisdexamfetamine, as well as non-stimulant options. Please note, methylphenidate, dexamfetamine and lisdexamfetamine are prescription medicines and Class B controlled drugs.
Medication decisions should always be made with an appropriate clinician. The right option, dose, and review plan will depend on the person’s age, symptoms, medical history, other medicines, and individual needs.
Behavioural and psychological support
Behavioural and psychological support can be helpful for both children and adults.
For children, this may include parent support, behavioural strategies, classroom adjustments, and routines that help reduce overwhelm.
For adults, talking therapies such as cognitive behavioural therapy, often called CBT, may help with planning, organisation, procrastination, emotional regulation, and self-esteem.
ADHD coaching may also help some people build practical systems for daily life, study, or work.
Support at school or work
Small changes can make a meaningful difference.
For children and young people, this may include classroom support, clear instructions, movement breaks, extra time, visual reminders, or help with planning and transitions.
For adults, workplace support may include clearer deadlines, reduced distractions, written instructions, flexible work structures, or breaking larger tasks into smaller steps.
Helpful everyday strategies can include:
- Using reminders, calendars, and checklists
- Keeping routines as consistent as possible
- Breaking tasks into smaller steps
- Reducing distractions where possible
- Building in movement breaks
- Prioritising sleep and regular meals
- Asking for support before things become overwhelming
Support for coexisting conditions
ADHD often occurs alongside other conditions, including anxiety, depression, learning differences, autism, substance use concerns, and sleep problems.
When these are present, they should be considered as part of the overall care plan. Supporting sleep, mood, stress, and daily routines can often make ADHD symptoms easier to manage.
Living with ADHD
Living with ADHD can be challenging, but understanding what is going on can be a helpful turning point.
Many people with ADHD spend years feeling frustrated, disorganised, misunderstood, or exhausted from trying to keep up. A diagnosis or assessment can help explain these patterns and open the door to more suitable support.
Alongside formal treatment, everyday habits can also help. Regular physical activity, consistent sleep, a steady routine, healthy meals, stress management, and practical planning tools can all support day-to-day functioning.
It can also help to understand and work with your strengths. Many people with ADHD are creative, energetic, curious, intuitive, and able to focus deeply on things that genuinely interest them. The goal is not to change who you are, but to build support and systems that make daily life easier.
Published on 24.07.2026
Frequently Asked Questions
Are there early signs of ADHD?
Yes. ADHD begins in childhood, so signs are usually present from a young age, even if they were not recognised at the time.
Early signs may include difficulty paying attention, restlessness, impulsivity, emotional outbursts, disorganisation, or trouble following instructions. In adults, an assessment will usually look for evidence that symptoms were present earlier in life.
Can you develop ADHD as an adult?
ADHD does not usually start in adulthood. The symptoms begin earlier in life, although they may not be recognised until later.
Some adults seek help when work, study, parenting, relationships, or daily responsibilities make symptoms harder to manage.
Is ADHD curable? Can it go away?
ADHD is not usually described as something that is cured. It is a lifelong neurodevelopmental condition for many people.
What can change is how symptoms show up and how much they affect daily life. Some people find that visible hyperactivity reduces as they get older, while challenges with attention, organisation, time management, or emotional regulation continue.
Some people may no longer meet the full diagnostic criteria in adulthood, while others continue to experience symptoms throughout life.
With the right treatment, strategies, and support, children and adults with ADHD can manage symptoms and live well.
Is ADHD a mental illness?
ADHD is usually described as a neurodevelopmental condition rather than a mental illness.
However, ADHD can occur alongside mental health conditions such as anxiety or depression. If this happens, both should be considered as part of a person’s care.
Can ADHD be managed without medication?
Some people manage ADHD with practical strategies, therapy, coaching, lifestyle changes, school support, or workplace adjustments. Others benefit from medication as part of their treatment plan.
The right approach depends on the person, their symptoms, and how ADHD affects daily life. A health professional can help you decide what support may be most appropriate.
Is an online ADHD quiz enough for a diagnosis?
No. Online screening tools can be useful for starting a conversation, but they do not provide a diagnosis.
A formal diagnosis requires a clinical assessment by a suitably qualified and experienced health professional.