ADHD in Adults
A plain English guide to what ADHD is, how it presents in adults, and what to expect from assessment and treatment.
A note from Dr Chris
I have ADHD myself, so this is something I understand from both sides. Before my own assessment I genuinely did not appreciate how much it was affecting my day to day life, and that is more common than you might think.
I know it might sound like a placation, but I genuinely mean this: we understand that it is confusing, that it is new, and there is really no such thing as a stupid question. We would far rather you ask and clarify than leave with uncertainty. There is no right or wrong when it comes to how you feel about any of this. What matters is that we get it right for you, and that starts with an open and honest conversation.
What is ADHD?
Attention Deficit Hyperactivity Disorder (ADHD) is a neurodevelopmental condition. It relates to the way the brain develops and works, rather than being caused by upbringing, personality, or lifestyle. It is not a character flaw. It is not laziness. It is a genuine, well-researched neurological difference.
ADHD affects the brain's executive function system. This is the part responsible for attention, impulse control, working memory, time management, and emotional regulation. When this system works differently to the typical pattern, it affects how someone thinks, organises, and interacts with the world around them.
How common is it?
ADHD affects around 3–5% of adults in the UK. For many people, it went unrecognised in childhood, particularly in women and girls, where presentations are often more subtle and more easily masked.
There are three recognised presentations:
Predominantly Inattentive
Difficulty sustaining attention, easily distracted, forgetful, disorganised
Predominantly Hyperactive-Impulsive
Restlessness, impulsivity, difficulty waiting, often talking over others
Combined
Features of both. The most common presentation in adults.
How ADHD presents in adults
ADHD in adults can look quite different from the hyperactive, classroom-disrupting child of popular imagination. Many adults with ADHD have developed coping strategies over decades that partially mask their symptoms. This does not mean the ADHD is not there. It means they have been working incredibly hard to manage it.
Common experiences tend to fall across four areas:
Attention & Focus
- Difficulty sustaining attention on tasks that are not immediately rewarding
- Easily distracted, by external noise or by internal thoughts
- Starting many tasks but struggling to finish them
- Losing track mid-conversation
- Hyperfocus on things that are genuinely engaging, sometimes at the expense of everything else
Organisation & Time
- Chronic lateness or difficulty estimating how long things will take
- Regularly losing things (keys, phone, wallet)
- Struggling to prioritise or know where to start
- Procrastination, particularly on important but overwhelming tasks
- "Time blindness", a poor intuitive sense of time passing
Emotions & Relationships
- Emotional dysregulation, meaning intense reactions that feel hard to manage
- Rejection sensitive dysphoria (RSD), an intense and sometimes overwhelming response to perceived criticism
- Mood variability and low frustration tolerance
- Relationship difficulties due to impulsivity or forgetting commitments
Work & Daily Life
- Underperforming relative to intelligence or actual capability
- Difficulty with admin, paperwork, and repetitive tasks
- Impulsive decisions, whether financial, social, or otherwise
- Sleep difficulties (difficulty switching off, irregular patterns)
- High caffeine use as a form of self-medication
Worth knowing: Many of these experiences are also present in other conditions, including anxiety, depression, autism, and sleep disorders. A thorough assessment always considers these possibilities, and we will always be honest with you about what we find.
Getting assessed at BGM Medical
Our assessment process is thorough and unhurried. We do not use a 45-minute tick-box appointment. We take the time to understand you properly.
Intake & Screening
You complete a short intake form and a validated screening questionnaire. We may ask someone who knew you well as a child to complete a collateral questionnaire. Their perspective can be genuinely valuable.
We are honest with you from the start. If screening suggests ADHD is unlikely, we tell you that clearly.
Full Assessment
A thorough, unhurried clinical interview with no time limit. We explore your current symptoms in detail, your history from childhood to now, and consider other explanations for what you are experiencing.
This is a conversation, not a tick-box exercise.
Outcome Discussion
We discuss our findings with you directly, clearly, and honestly. Whether or not ADHD is diagnosed, you will leave with a full understanding of what we found and why.
No jargon. No ambiguity. Just a clear, honest conversation.
Report & Letter
If ADHD is diagnosed, you receive a formal diagnostic report and a letter for your NHS GP. Both are included in the assessment fee. We aim to have this to you within a week.
Your report is yours to keep and share as you choose.
After a diagnosis
Receiving an ADHD diagnosis as an adult can bring a mixture of emotions, and all of them are valid.
Relief
Many people feel a profound sense of relief. Things finally make sense, the struggles were real, and there was always a reason. That is not nothing.
Uncertainty or grief
Others feel strange, overwhelmed, or grieve time lost. Some feel the diagnosis does not quite fit. All of these responses are completely normal.
There is no right way to feel. A diagnosis is not a life sentence. It is a starting point. It gives your experience a name, and with that comes access to support, treatment options, and a much better understanding of how you work.
After assessment, we will talk through all the options available to you at your own pace. There is no pressure to go down any particular route, and no rush to make any decisions.
If no diagnosis is made
Not every assessment results in a diagnosis, and an inconclusive or negative result is not a failure on your part. Sometimes the symptoms have another explanation: anxiety, sleep deprivation, burnout, depression, autism, or another condition entirely.
We will always explain our reasoning clearly, and help you understand what we found and what it means. If you are struggling, we will help you identify what is actually going on and signpost you appropriately.
We do not leave people without direction. Whatever the outcome of your assessment, you will leave with a clear plan.
Treatment options
There is no single right treatment for ADHD. We take a genuinely individualised approach based on your symptoms, your life, and what matters to you. Many people find a combination works best.
Medication
The most evidence-based treatment for ADHD in adults. Stimulants (methylphenidate, lisdexamfetamine) are first-line; non-stimulants (atomoxetine, guanfacine) are an option when stimulants are not suitable.
Read our medications guide →Psychological approaches
CBT adapted for ADHD helps with organisation, procrastination, emotional regulation, and building practical strategies. It works well alongside medication for many people.
Coaching
ADHD coaching is practical and forward-focused. It is not therapy. A good coach helps you understand how your brain works and build systems that work with it, not against it.
Our coaching service →Lifestyle
Sleep, exercise, diet, and routine all have a meaningful impact on ADHD symptoms. These are worth taking seriously even if medication is part of the picture.
ADHD as a strength
ADHD is not just a list of deficits. The same traits that create friction in some situations are genuinely exceptional in others. Many of the most creative, driven, and successful people in every field have ADHD, not despite it, but in many ways because of it.
The aim of treatment is never to change who you are. It is to reduce the friction so you can use those strengths more consistently, on your own terms, without the constant background effort that unmanaged ADHD demands.
Hyperfocus
The ability to immerse completely in work that matters to you, producing output others cannot match
Creativity
Non-linear thinking that makes unexpected connections and finds solutions others miss
Energy & drive
High motivation and momentum when genuinely engaged, and that is difficult to replicate
Performing under pressure
Many people with ADHD do their best work with a deadline. The urgency activates focus.
Big-picture thinking
Less constrained by convention, more open to novel approaches and unconventional solutions
Empathy & intensity
Deep feelings and strong connection to others, a richness of experience that is a genuine gift
Getting support
If you are a BGM Medical patient and have questions about anything in this guide, or about your own assessment or management, please do get in touch. There are no stupid questions. We would genuinely rather you ask.