ADHD in adults is a neurodevelopmental condition whose symptoms begin in childhood and may persist beyond the age of 18. Visible hyperactivity often becomes less prominent in adulthood, while inattention, internal restlessness, impulsivity and organisational difficulties may remain. For a diagnosis, symptoms must cause significant impairment and occur in more than one setting.
How ADHD may present in adults
- difficulty planning, prioritising, meeting deadlines and completing tasks;
- frequent distraction, forgetfulness and losing necessary items;
- difficulty with prolonged or repetitive tasks;
- internal restlessness and a need to remain busy;
- impulsive decisions, spending or comments;
- difficulty waiting and regulating attention or emotional responses;
- inconsistent performance at work, in education or in everyday tasks.
Many people experience some of these difficulties occasionally, and this does not mean that they have ADHD. Their persistence, childhood onset, presence across situations and actual effect on everyday life are important.
Would you like to speak with a specialist?
Submit a request — our administrator will clarify the details and arrange a convenient time.
Causes and coexisting conditions
ADHD has a complex neurobiological and genetic basis that cannot be explained solely by dopamine levels. Stress, traumatic experiences or parenting are not direct causes, although they can intensify difficulties or produce a similar presentation. Adult ADHD can coexist with anxiety, depression, sleep disorders, autism spectrum conditions and problematic substance use.
Assessment for ADHD in adults
Diagnosis is made by a professional with training and expertise in ADHD assessment and treatment. It includes a clinical and psychosocial interview, developmental and psychiatric history, and assessment of symptoms and impairment at home, at work, in education and in relationships.
If ADHD was not diagnosed during childhood, the clinician explores whether characteristic features were present before adulthood. With the person's consent, school records or information from parents, a partner or other people close to them may be helpful. However, a lack of these sources should not automatically end a professional assessment.
CAARS and other rating scales, as well as computerised attention tests such as MOXO, can support assessment but do not confirm the diagnosis on their own. The clinician also considers alternative explanations and coexisting mental and physical health conditions.
Treatment and practical support
The person and clinician first agree goals and discuss environmental modifications, such as task structure, written reminders, fewer distractions, planned breaks and reasonable adjustments at work or in education.
If symptoms continue to cause significant impairment after these changes have been implemented and reviewed, a specialist may offer medication. Before treatment begins, mental and physical health, current medicines, the risk of substance misuse, pulse, blood pressure and other clinically relevant factors are assessed.
Non-pharmacological treatment may be chosen by the person, used when medication is not tolerated or has not been effective, or added when medication has helped but significant impairment remains. It should be structured and focused on ADHD and may include elements of cognitive behavioural therapy and practical organisational skills.
Ongoing review
The treatment plan is reviewed regularly, taking account of effectiveness, side effects, sleep, physical health and changes in the person's life. Needs can change, so decisions about medication and psychological support can be revisited. The aim of care is not to change someone's personality, but to reduce impairment and help them pursue their own goals.