ADHD in adults: signs, assessment and next steps
Adults reach the question of ADHD from very different directions: a child's diagnosis that sounds familiar, a career that keeps stalling for reasons that are hard to name, or years of being told to try harder. This page describes what adult ADHD actually looks like, how assessment works in Ireland, what treatment involves, and which medicines we do not issue at all, so that nobody starts a process here that cannot end here.
What does ADHD look like in an adult?
Adult ADHD shows itself less as visible hyperactivity and more as a persistent difficulty regulating attention, activity and impulse. In practice that means starting tasks late and then working in bursts, losing the thread of long documents or conversations, missing appointments and deadlines, and having a home or desk that resists every system tried on it.
Restlessness in adults is often internal: difficulty sitting through meetings or films, talking over people, making decisions quickly and regretting them, spending impulsively, changing jobs frequently. Many adults describe strong emotional reactions that pass quickly, and a striking ability to concentrate intensely on something interesting while being unable to begin something dull.
The pattern that matters for diagnosis is not a bad month. Symptoms must have been present since childhood, show up in more than one part of life such as work and home, and cause real difficulty. Everyone is distractible sometimes, and short-term problems are more often explained by sleep loss, stress or another condition.
What else can look like ADHD?
Concentration is the first thing most illnesses take away, so a great many conditions produce the same complaints. Depression and anxiety both impair attention and memory. Chronic sleep deprivation and obstructive sleep apnoea produce inattention, irritability and poor decision-making that improve entirely once sleep is treated.
An underactive or overactive thyroid, anaemia, vitamin B12 deficiency, chronic pain, alcohol and drug use, and the after-effects of a head injury all belong on the same list. So do bipolar disorder, autism, learning disabilities and the long-term effect of trauma, all of which can coexist with ADHD rather than simply mimicking it.
This is exactly why online questionnaires and social media checklists cannot diagnose ADHD. They measure symptoms without asking what else could produce them, and they cannot verify that the pattern began in childhood. A positive score is a reason to seek an assessment, not a diagnosis in itself.
How does assessment work in Ireland?
The usual route starts with your GP, who reviews the history, checks for other explanations with examination and blood tests where relevant, and refers to a service that assesses adult ADHD. Public adult ADHD services in Ireland are limited and waiting times can be long, and some people choose a private assessment for that reason.
A proper assessment is a structured clinical interview covering current symptoms, childhood history, education and work, other mental and physical health problems, and the effect on daily life. School reports or an account from a parent or partner are often requested, because childhood onset has to be established from more than memory. Rating scales support the interview; they never replace it.
ADHD Ireland is a national organisation providing information, support groups and guidance for adults going through this, and it is a reasonable first point of contact while waiting. Diagnosis in adults is a specialist assessment, and it cannot be made from an online questionnaire, ours included.
What treatment is available?
Treatment is usually a combination of medicine, structured psychological support and practical adjustments. The medicines with the strongest evidence in adults are stimulants, principally methylphenidate and lisdexamfetamine. Non-stimulant options such as atomoxetine exist and are used where stimulants are unsuitable, not tolerated, or not wanted.
Medicine is started and adjusted under specialist supervision, with monitoring of blood pressure, pulse, sleep, appetite and weight, and with attention to any history of heart disease, high blood pressure, glaucoma, substance use or psychiatric illness. Doses are titrated individually rather than fixed by weight, and the aim is the lowest dose that works.
The non-medicine part is not a consolation prize. Psychoeducation, ADHD-focused cognitive behavioural approaches, coaching, external structure such as alarms, lists and single-calendar systems, sleep repair, exercise and workplace adjustments all measurably improve function, and they remain useful whether or not medicine is taken.
Which ADHD medicines we do not issue
We do not issue stimulant medicines for ADHD, including methylphenidate and lisdexamfetamine, in any circumstances. They are controlled drugs, and controlled substances are excluded from cross-border prescriptions under Article 11(6) of Directive 2011/24/EU. This is a legal exclusion, not a matter of internal policy or of how convincing a request is.
That exclusion applies regardless of whether treatment has already been started elsewhere, whether you have a specialist letter, or how long you have been stable on it. A prescription for a controlled medicine has to come from a prescriber operating within the national system that dispenses it, and continuity of stimulant treatment therefore has to be arranged through the service that supervises it.
If you are already under a service and treatment is at risk of running out, contact that service before the supply ends, and speak to your GP about the interim. If you have moved to Ireland on established treatment, bring your specialist documentation to a GP, who can advise on the referral route. Buying stimulant medicines from unregulated online sellers is both illegal and genuinely dangerous.
When do I need medical help without delay?
Call 112 or 999, or go to an Emergency Department, if you have thoughts of ending your life or of harming yourself or someone else, or if you feel unable to keep yourself safe. Free confidential support is available from Samaritans on 116 123 at any hour, and contacting them is not a substitute for emergency services when the danger is immediate.
Seek urgent medical care for chest pain, fainting, a racing or irregular heartbeat, severe breathlessness, a seizure, or unusual agitation, confusion or hallucinations, particularly in anyone taking stimulant medicine or a substance obtained outside a pharmacy. Stop taking it and get assessed rather than adjusting the dose yourself.
Arrange an assessment promptly, not eventually, for a marked deterioration in mood, escalating alcohol or drug use, an inability to work or care for dependants, or symptoms that appeared for the first time in adulthood without any childhood history. New attention problems in an adult who never had them deserve a medical explanation, and ADHD is not the likeliest one.
What helps while waiting for an assessment
Waiting lists are the reality in Ireland, so the practical question is what can be done meanwhile. Fix sleep first, because sleep loss reproduces almost every ADHD symptom and makes the assessment harder to interpret. Regular exercise has a measurable short-term effect on attention.
Reduce the load on working memory instead of trying to strengthen it. One calendar rather than three, alarms for everything time-bound, tasks broken into steps small enough to start, a single inbox for paper, and a rule that anything taking under two minutes gets done at once. External structure works where willpower reliably does not.
Gather what the assessment will need: school reports, previous letters, a written account of childhood behaviour from a parent if possible, and a short note of the difficulties you have now and what they cost you. Alcohol and cannabis both worsen attention and complicate assessment, so reducing them helps twice over. ADHD Ireland runs support groups where this ground is very well covered.
Can I be diagnosed with ADHD through an online questionnaire?
No. Diagnosis in adults requires a structured clinical assessment that establishes childhood onset, impact across more than one setting, and the exclusion of other explanations such as depression, sleep disorders and thyroid disease. Online screening tools indicate whether an assessment is worth pursuing; they do not diagnose.
Do you prescribe ADHD medicines?
We do not issue stimulant medicines such as methylphenidate or lisdexamfetamine. They are controlled drugs, and controlled substances are excluded from cross-border prescriptions under Article 11(6) of Directive 2011/24/EU. Treatment of ADHD is managed by the specialist service that supervises it.
I was diagnosed abroad and have moved to Ireland. What now?
Bring your diagnostic report and specialist letters to a GP, who can advise on referral and on the interim. Continuity of a controlled medicine has to be arranged through a service operating within the Irish system; it cannot be handled by a cross-border prescription.
Can ADHD appear for the first time in adulthood?
The condition itself begins in childhood, even if it was never recognised, which is common in people whose difficulties were masked by ability or by a structured home. Attention problems genuinely starting in adulthood point to another cause and should be assessed on that basis.
Is medicine the only treatment?
No. Psychoeducation, ADHD-focused cognitive behavioural approaches, coaching, sleep treatment, exercise and workplace adjustments improve function and are useful whether or not medicine is used. For some adults they are the whole of the treatment plan.