Page last updated Monday 20th Jul 2026
victoria mccann, communications Director at Castle Health
Page written by Victoria McCann, Communications Director
Ralf Warren, General Practitioner and clinical reviewer for Castle Health
Clinically reviewed by Ralf Warren, General Practitioner

It’s not uncommon for some people become dependent on a substance to quiet a racing mind or loud thoughts. Others might use stimulants to be able to get through the day, feeling like they just don’t have enough energy without them. 

What they might not know, though, is that this substance dependency might be to manage symptoms of ADHD.

The relationship between ADHD and addiction has a strong link. The two overlap more often than we might recognise.

Our team understands that – in these cases – both ought to be treated in tandem with the nuanced expertise and care needed to ensure sustainable sobriety.


When ADHD and addiction overlap

Both ADHD and addiction involve and can affect the same part of the brain that manages reward and motivation. It functions differently for those living with ADHD, making it harder to tolerate delayed rewards and regulate impulses. 

Research published in the Journal of Clinical Psychiatry found that this shared neurological basis gives people with ADHD a significantly higher risk of developing addiction disorders.

At Castle Health, we offer dual diagnosis treatment across outpatient clinics in the UK, Ireland, and serving wider Europe, as well as through residential care at Castle Craig and Smarmore Castle. 

Our expert team of psychiatrists do not provide formal ADHD assessments or diagnoses directly on-site. We refer those out, externally.

Young man managing ADHD and addiction while working through notes at home.

“I contacted Castle Health [formerly CATCH Recovery] seeking guidance and options to support a relative who was having a difficult time both with addiction and other mental health concerns. The team were incredibly kind and informed, they took the time to go through all the options with me and helped us plan how to approach the matter. Fortunately the person has now been receiving care from Castle Health for several months and is doing really well. A big thank you to the wonderful team. I would highly recommend this service.”

– Wendy O’Brien, relative of a patient

ADHD and addiction: understanding your treatment options

The connection between addiction and neurodiversity is increasingly recognised in clinical research. ADHD is a neurodevelopmental condition, and treatment needs to reflect that. A dual diagnosis treatment is built around both the addiction and the additional psychiatric diagnosis.

Research published in Journal of Cllinical Psychiatry found that those with ADHD face an increased risk of developing addiction disorders. Furthermore, American research published in the Journal of Clinical Psychiatry estimated that up to 50% of adults with substance use disorders have a lifetime diagnosis of ADHD. 

Treating the substance use without managing ADHD rarely holds for long. Managing ADHD without acknowledging the substance use doesn’t hold either.

Outpatient treatment for ADHD and addiction

For most people seeking help with ADHD and addiction, outpatient treatment is the right starting point. Through our outpatient programmes, Castle Health provides in-person sessions across clinics in the UK, Ireland, and Europe, structured around your schedule.This ensures you can stay connected to your daily life. 

The clinical work is still, however, substantial. When ADHD is part of the clinical picture, consistency and pace are key considerations. Sessions are designed to work with attention patterns, never against them. 

Online treatment for ADHD and addiction

If attending a clinic regularly isn’t practical, online treatment runs to the same clinical standard through secure video sessions. Sessions are clinician-led and structured. 

For people with ADHD, removing the logistical and transitional demands of regular travel can make sustained engagement more achievable.

Online treatment works best when there is a reliable routine around it. Our team will help you build that routine from the start.

Inpatient treatment for ADHD and addiction

When the level of need calls for a more intensive setting, Castle Craig Hospital in Scotland and Smarmore Castle in Ireland offer residential treatment programmes. 

Both settings have extensive experience with dual diagnosis, including ADHD and addiction. Since the risk of substance use disorders can be twice as high in people with ADHD, and four times as high when ADHD co-occurs with conduct disorder, residential settings provides round-the-clock clinical presence and additional structure.

Medically managed detox

Some substances cannot be stopped without medical supervision. Alcohol, benzodiazepines, and opioids carry withdrawal risks that can’t be safely be managed at home. 

The US National Library of Medicine sets out the key timelines:

  • Short-acting opioid (e.g. heroin, fentanyl) withdrawal typically begins within 8 to 24 hours of the last dose and can continue for up to 10 days.
  • Benzodiazepine withdrawal generally begins within 1-7 days and may continue for 2-8 weeks or longer.
  • Alcohol withdrawal may carry significant risk, and in cases of heavy use should be carried out under the support of a medical team

Cocaine does not typically produce visible physical withdrawal symptoms. But MedlinePlus documents the significant psychological effects that can follow stopping. These are intense cravings, depressed mood, anxiety, fatigue, and, in some cases, suicidal thoughts.

Therapies for ADHD and addiction

A review of the literature found that medication alone is not helpful at addressing substance dependencies, but still advocates for supervised pharmacological management of ADHD. The general consensus is that using structured behavioural and psychological treatment is central to managing ADHD and addiction together. 

This can help people to understand how the condition affects their daily functioning and develop practical coping strategies.

Cognitive Behavioural Therapy (CBT) can help effectively manage symptoms of adult ADHD, compared to medication alone, with modified approaches like structured skills training, producing measurable symptom reduction.

Dialectical Behaviour Therapy (DBT), individual therapy, group therapy, and family therapy are all part of the Castle Health offering. These therapies work better when adapted for how an ADHD brain actually engages with sessions. Pacing, structure, and working with stimulation patterns rather than against them are not accommodations. They are good clinical practice for this population.

What to expect from ADHD and addiction treatment with Castle Health

Castle Health’s approach to dual diagnosis starts from one position: treating ADHD and addiction together produces better outcomes than treating either in isolation. Addiction and mental health conditions rarely happen alone. That is why our dual diagnosis care treats both with equal clinical focus. 

We work with you – your whole picture.

When you first get in touch, you’ll speak with our team confidentially. There’s no pressure to commit to anything in that first conversation. We will listen to your experience, explain options that fit your situation, and be clear about what we do and do not offer.

If you need a formal ADHD assessment or diagnosis, we will refer you to an appropriate external psychiatrist and explain how that fits with starting treatment. 

If your use of alcohol or other substances requires a medically managed detox before therapy can begin, we will explain that at the start. You can read more about patterns of alcohol use in ADHD on our alcohol page.

Recovery from a dual diagnosis is rarely linear. It is not a programme you complete and then move on from. Our model includes ongoing aftercare and recovery support because the evidence supports longer engagement, and because the challenges of ADHD do not disappear when primary treatment ends.

Man reflecting by a lake at sunset, representing relapse in addiction recovery.

If someone in your life is living with ADHD and addiction

When someone you know has both ADHD and a relationship with substances, it can be hard to make sense of what you are seeing. 

Which came first? Has one condition been making the other worse? These are questions we often sit with for a long time before anything changes. 

Not finding a clear answer is common, as dual diagnosis presents in ways that are difficult to read from the outside. What people in this situation often describe is an oscillation between wanting to help, not knowing how, and feeling worn down by the uncertainty. 

Talking to someone you know about getting help must meet them where they are. Our family therapists have experience working with exactly this dynamic; not only supporting the person in treatment, but helping people in their lives understand what they have been carrying and what practical next steps look like.

ADHD and alcohol addiction have a particularly well-documented relationship. Understanding patterns of alcohol use in ADHD can help you get a clearer picture of the relationship between the two conditions. 

Our team also works with families on intervention approaches. If the person in your life is not yet ready to seek help, there are still useful steps available. Family therapy and couples therapy are both part of our offering.

Our model includes ongoing aftercare and recovery support for families and partners who want to stay connected beyond the primary treatment phase. Recovery doesn’t end at discharge, and our support doesn’t either.

A therapist and a patient discussing the patient's addiction to legal drugs
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Frequently asked questions about ADHD and addiction

Can I keep taking my ADHD medication during addiction treatment?

In most cases, yes. Your medication will be reviewed as part of your assessment. Our clinical team will work with you and, where appropriate, with your prescribing psychiatrist to ensure your ADHD is managed safely throughout treatment. We don’t make changes to your medication without your knowledge and involvement.

Do I need a formal ADHD diagnosis before starting addiction treatment with Castle Health?

No. Many people who come to us with a suspected ADHD and addiction presentation have never received a formal diagnosis. You can begin treatment without one. If a formal assessment would be clinically useful, we will refer you to an external psychiatrist and explain how that fits with your treatment plan.

What if I’m not sure whether the ADHD or the substance use came first?

You don’t need to know. Most people cannot say with certainty, and clinically it matters less than addressing both together. Our assessment will give us a clearer picture of your history and what treatment looks like for you specifically.

How much does private dual diagnosis treatment cost?

Costs depend on the type and length of treatment. Please contact our team directly for a clear breakdown based on your situation. We will give you a straightforward answer with no obligation to proceed.

Is treatment for ADHD and addiction available on the NHS?

Yes, though pathways and waiting times vary. If you are weighing up your options, our team can explain the differences between NHS and private care clearly and without pressure. We are happy to help you work out the right route, even if that turns out not to be with us.