Gambling Disorder

Current Thinking, Assessment, Treatment and Prevention in 2026

A comprehensive clinical and public-health review

Introduction

Gambling is common, but gambling disorder is not simply “gambling too much”. It is a persistent pattern in which control is impaired, gambling becomes disproportionately important, and the behaviour continues despite significant consequences. The disorder sits alongside substance-use disorders in contemporary diagnostic systems because the clinical pattern overlaps with addiction: craving and cue reactivity, reinforcement learning, tolerance-like escalation, chasing losses, impaired inhibitory control, relapse and continued behaviour despite harm.

The modern clinical view is broader than an individual-disease model. Risk arises from an interaction between person, product and environment. Individual vulnerabilities such as impulsivity, ADHD, depression, anxiety, trauma, substance use, financial stress and loneliness may interact with highly accessible digital products, rapid event frequency, in-play betting, personalised marketing, frictionless payments and intermittent rewards. This does not remove personal agency; it explains why good treatment combines psychological work with practical barriers, financial safeguards, social support and changes to gambling access.

NICE published the first dedicated guideline for gambling-related harms in January 2025. It recommends gambling-specific treatment, peer support, motivational interviewing when engagement is uncertain, group CBT as the preferred psychological intervention, individual CBT where group treatment is unsuitable, and consideration of specialist-supervised naltrexone after an adequate course of psychological therapy has not achieved the desired outcome or when repeated relapse continues. The typical treatment goal is abstinence, agreed collaboratively with the person.

1. What is gambling disorder?

Gambling disorder is a behavioural addiction involving recurrent gambling that becomes difficult to control and causes clinically significant distress or impairment. Gambling itself exists on a continuum: many people gamble without obvious harm, some experience low or moderate levels of harm, and a smaller group develop severe, persistent disorder. The clinically important question is therefore not simply how often someone gambles or how much money they spend, but whether control, priorities, consequences and functioning have changed.

ICD-11 formulation

• ICD-11 describes gambling disorder through three core features: impaired control over gambling; increasing priority given to gambling over other interests and daily activities; and continuation or escalation despite negative consequences. The pattern must be sufficiently severe to cause significant impairment. The framework can encompass both predominantly online and predominantly offline gambling.

DSM-5-TR approach

DSM-5-TR uses a symptom-count approach over a 12-month period. The symptoms include preoccupation, increasing amounts of money needed to achieve the desired excitement, unsuccessful attempts to cut down, restlessness or irritability when trying to stop, gambling to escape distress, chasing losses, concealment or lying, jeopardised relationships or opportunities, and reliance on others to relieve desperate financial situations. Diagnosis requires a persistent pattern producing significant impairment and is not made when the behaviour is better explained by a manic episode.

2. Gambling-related harm is broader than diagnosis

A person can experience major gambling-related harm without meeting full diagnostic criteria. Modern services increasingly use a harm framework alongside diagnosis because consequences may emerge across multiple domains and affect partners, children, parents, colleagues and employers as well as the person gambling.

3. How common is gambling and gambling harm?

The 2025 Gambling Survey for Great Britain, published in July 2026, estimated that 59% of adults had gambled in the previous 12 months and 47% in the previous four weeks. Excluding people who had only taken part in lottery draws, the figures were 40% and 27% respectively. These figures underline the difference between widespread gambling participation and the much smaller group experiencing clinically important disorder or harm.

Prevalence estimates vary substantially according to survey method, population and measure. The Gambling Commission therefore advises careful interpretation of the newer Gambling Survey for Great Britain and discourages simplistic comparison with older telephone-survey estimates. Screening scores such as the Problem Gambling Severity Index (PGSI) are useful for population surveillance and case identification but are not equivalent to a clinical diagnosis.

4. Current thinking: why gambling becomes addictive

No single mechanism explains gambling disorder. The strongest contemporary models combine reward learning, cognitive bias, emotion regulation, impulsivity and compulsivity, habit formation, cue reactivity, social context and the structural characteristics of gambling products. A person may move between positive reinforcement (seeking excitement or reward) and negative reinforcement (gambling to relieve distress, boredom or withdrawal-like discomfort).

5. The digital gambling environment

The migration of gambling to smartphones is clinically important. A casino, bookmaker and betting exchange can now be carried in a pocket, available continuously and linked to saved payment methods, notifications and personalised offers. The distinction between “online gambling” and ordinary life has therefore narrowed. Treatment needs to assess the actual digital ecosystem around the person: accounts, apps, email and SMS marketing, social-media exposure, sports content, banking access and use of VPNs or offshore sites.

Product features that can increase risk

·       High event frequency and short intervals between stake and outcome.

·       Continuous play and the ability to immediately re-stake winnings.

·       In-play betting and constantly changing odds that promote repeated decisions during a single sporting event.

·       Near-miss effects, celebratory audiovisual feedback and “losses disguised as wins” in some gaming formats.

·       Easy deposits, stored cards and minimal friction between urge and transaction.

·       VIP systems, bonuses, free bets and targeted re-engagement marketing.

·       Cross-sell between products, allowing a sports bettor to move rapidly into casino or slots products.

·       24-hour access, privacy and the ability to gamble during insomnia, intoxication or acute distress.

In Great Britain, online slot stake limits took effect in 2025: £5 per game cycle for adults aged 25 and over, and £2 for adults aged 18 to 24. These limits are an example of a “safer by design” intervention intended to constrain very rapid high-stake losses, although they do not make online slots risk-free.

6. ADHD, neurodiversity and gambling

ADHD is particularly relevant to gambling disorder because the core vulnerabilities can overlap: impulsive decision-making, reward sensitivity, delay aversion, sensation seeking, boredom intolerance, emotional dysregulation, hyperfocus on highly salient activities, and difficulty stopping once engaged. Gambling can also offer immediate stimulation, rapid feedback and a temporary sense of focus, all of which may be disproportionately reinforcing for some people with ADHD.

A 2026 systematic review of people experiencing gambling harm estimated ADHD prevalence at about 24%, although there was substantial heterogeneity between studies and the pooled estimate should not be treated as a universal clinic rate. The clinical implication is nevertheless clear: ADHD should be actively considered in gambling services, and gambling should be actively assessed in ADHD services when there are financial, impulsivity or addictive-behaviour concerns.

Autism is less well studied. Possible pathways include intense interests, repetitive behaviour, social isolation, difficulty with uncertainty or strong attraction to rule-based systems, but current evidence is too limited to support a single autism-specific gambling profile. Assessment should therefore remain individualised and avoid stereotypes.

7. Psychiatric and medical comorbidity

Comorbidity is the rule rather than the exception in treatment-seeking gambling disorder. A 2025 meta-analysis of population-based surveys estimated that more than four-fifths of people with gambling disorder had another mental disorder, with particularly high rates of substance-use, mood and anxiety disorders. Relationships are bidirectional: depression may precede gambling, gambling may precipitate depression through losses and shame, or both may be driven by shared vulnerabilities.

8. Suicide and acute risk

Suicide risk is one of the most important reasons gambling disorder should be treated as a serious mental-health condition. A 2024 meta-analysis found lifetime suicidal ideation in roughly one-third of people with gambling problems and lifetime suicide attempts in around one in eight, with markedly increased odds compared with people without gambling problems. A 2026 meta-epidemiological study also found substantially increased suicide mortality in gambling disorder, although estimates vary and observational studies cannot fully separate the effects of depression, substance use, debt and other confounders.

A focused risk assessment should include

·       Current suicidal thoughts, intent, planning, access to means and recent self-harm.

·       Recent gambling losses, debt, creditor pressure, threatened repossession, job loss, fraud exposure or discovery by family/employer.

·       Perceived entrapment and beliefs that death is the only way to solve debt or shame.

·       Alcohol or drug intoxication and access to large sums of money or credit.

·       Protective factors, dependants, supportive contacts and willingness to accept urgent help.

·       Safeguarding concerns involving children, vulnerable adults or coercive control around family finances.

Acute suicidality requires the same urgent mental-health response as suicidality in any other condition. Financial advice alone is not sufficient when there is imminent risk.

9. Assessment in clinical practice

Good assessment combines diagnostic criteria, severity, harms, comorbidity, risk, gambling-product history and an understanding of the function gambling serves for the individual. Shame commonly leads to minimisation, and the first figure disclosed for debt or gambling spend may be incomplete. A non-judgemental, matter-of-fact style improves disclosure.

Screening and severity tools

The PGSI is widely used in population and service settings. Scores of 1-2 indicate low-risk gambling, 3-7 moderate-risk gambling and 8 or more problem gambling. It is a screening/severity instrument, not a substitute for diagnostic assessment. Other instruments include the brief Problem Gambling Severity Index variants and gambling-specific symptom measures used by specialist services. A short direct question such as “Have you ever felt you should cut down on gambling, or has gambling caused financial, emotional or relationship problems?” can be an effective entry point in general clinical settings.

10. Formulation: understanding the cycle

A useful formulation explains why gambling started, what keeps it going and what now triggers relapse. It should link vulnerabilities, triggers, thoughts, emotions, behaviour and consequences rather than merely listing symptoms.

11. Treatment: general principles

NICE recommends gambling-specific interventions delivered by trained practitioners, with the person involved in decisions about goals and care. Treatment should be empathic and non-stigmatising, and should address gambling and its consequences rather than assuming that treatment of depression or anxiety alone will make the gambling disappear. The usual treatment aim is abstinence, but this should be agreed rather than imposed.

Multidisciplinary care may be needed when there are severe mental-health problems, substance dependence, neurodiversity, cognitive impairment, criminal justice involvement, housing problems or safeguarding concerns. Families and affected others should be offered support in their own right.

12. Cognitive behavioural therapy (CBT)

Gambling-specific CBT is the best-established psychological treatment. NICE recommends group CBT to reduce gambling severity and frequency, with individual CBT when a group is unwanted, unavailable or unsuitable. Typical NICE courses are about 8-10 group sessions or 6-8 individual sessions, with relapse prevention included.

13. Motivational interviewing and engagement

Ambivalence is common because gambling can simultaneously be causing harm and serving an important psychological function. NICE advises considering motivational interviewing when a person is unsure about treatment or lacks confidence in change. The approach explores the mismatch between gambling and the person’s own goals without argument, shame or confrontation. It is particularly useful early in treatment, after relapse and when abstinence feels threatening or unrealistic.

14. Peer support and mutual aid

NICE recommends offering peer support as an integral option. Peer work can reduce isolation and shame, provide practical recovery knowledge and make relapse easier to disclose. Mutual-aid approaches such as Gamblers Anonymous may be very valuable for some people, although fit varies and they should not be presented as the only legitimate route to recovery. Clinical and peer approaches can be complementary.

15. Practical barriers: reducing opportunity while the brain recovers

A recurring mistake is to treat access controls as a sign that a person has “not really changed”. In addiction treatment, environmental engineering is a legitimate therapeutic tool. Blocking access reduces the number of high-risk moments in which a rapid decision can undo longer-term intentions.

16. Medication

Medication is not first-line treatment for gambling disorder. No medicine is licensed specifically for the condition in the UK. Pharmacological research has examined opioid antagonists, antidepressants, mood stabilisers and other agents, but the evidence is smaller and more heterogeneous than for CBT.

Naltrexone

NICE recommends considering naltrexone to reduce gambling severity when an appropriate course of psychological therapy has not produced the desired outcome, or when repeated relapses continue despite psychological treatment. It should be initiated by or under the supervision of a clinician with relevant specialist experience. In the UK this is an off-label use.

The rationale is that opioid antagonism can reduce reward and urge intensity in some people. A 2025 systematic review and network meta-analysis supported opioid antagonists as among the more promising pharmacological options, but medication should be embedded within a broader plan that includes psychological treatment and practical safeguards.

Other medication

SSRIs are not established general treatments for gambling disorder, although they may be indicated for a co-occurring depressive or anxiety disorder. Mood stabilisation is essential when gambling occurs in bipolar disorder. Dopamine agonist-induced gambling requires medication review with the relevant medical specialist. Treating ADHD may improve executive control and reduce broader impulsivity in appropriately diagnosed patients, but ADHD medication should not be presented as a direct treatment for gambling disorder and clinical monitoring remains important.

17. Treatment of co-occurring conditions

NICE emphasises coordinated treatment. Some depression or anxiety is secondary to the crisis created by gambling and may improve as gambling stops; in other people the psychiatric disorder clearly predates the gambling and requires concurrent treatment. Severe substance dependence, severe PTSD or another destabilising condition may sometimes need to be addressed first so that the person can engage effectively with gambling treatment.

18. Families and affected others

Partners and family members can experience severe harm even when they never gamble themselves. They may be carrying debt, monitoring accounts, protecting children, managing disclosure to relatives or employers, and living with repeated cycles of promises and relapse. NICE recommends that affected others can receive support alone or jointly with the person gambling, depending on preference and consent.

·       Help affected others protect their own finances rather than making them responsible for “policing” recovery.

·       Encourage non-judgemental communication while recognising legitimate anger, grief and loss of trust.

·       Assess domestic abuse, coercive control, child safeguarding and financial exploitation where relevant.

·       Discuss whether joint financial arrangements remain safe during early recovery.

·       Offer their own psychological support when distress, anxiety or trauma symptoms are significant.

19. Relapse, lapse and long-term recovery

Relapse is common in behavioural addictions and should be prepared for explicitly. This does not mean it is inevitable or harmless. Early recognition can prevent a short lapse becoming a full return to uncontrolled gambling. NICE recommends ongoing support and additional treatment where needed.

20. NHS and UK treatment landscape in 2026

The UK treatment landscape has changed substantially. NICE NG248, published in January 2025, created a national evidence-based framework for identification, assessment and management. NHS specialist gambling clinics form the higher-intensity tier for people with severe gambling harm or complex co-occurring needs. Community and voluntary-sector services can provide treatment and support at lower levels of complexity, and NICE specifically states that services should operate without gambling-industry influence.

A statutory gambling levy now funds research, prevention and treatment. Government reported in March 2026 that the levy had raised just under £120 million, ringfenced for those purposes, with 50% of funding allocated to NHS England and the Scottish and Welsh governments for treatment and support. This represents a major shift away from reliance on voluntary industry contributions.

Current regulatory developments

• · Online slot stake limits are now in force in Great Britain: £5 for adults aged 25+ and £2 for 18-24-year-olds.

·       The statutory levy creates independent, ringfenced funding for research, prevention and treatment.

·       Premier League clubs have implemented their voluntary ban on gambling logos on the front of matchday shirts from the 2026/27 season, although other forms of gambling sponsorship remain possible.

·       In July 2026 the government opened a consultation on banning sponsorship and advertising by gambling operators not licensed in Great Britain, including in sport.

21. A stepped clinical pathway

1. Identify gambling-related harm and ask directly about severity, finances, mental health and suicide risk.
2. Provide immediate practical harm reduction: self-exclusion, blocking tools, banking controls and debt advice where needed.
3. Assess diagnostic criteria, gambling products, triggers, comorbidity, neurodiversity, substances and safeguarding.
4. Agree the treatment goal, usually abstinence, and formulate what gambling is doing for the person.
5. Offer gambling-specific CBT; use motivational interviewing where ambivalence is prominent and offer peer support.
6. Treat co-occurring psychiatric and substance-use disorders in a coordinated way.
7. For inadequate response or repeated relapse after psychological therapy, consider specialist pharmacological review including naltrexone where appropriate.
8. Build a written relapse-prevention plan and continue support for financial, relational, housing, occupational and legal harms.
9. Offer affected others their own support and safety planning.

22. What good care looks like

23. Emerging directions

Research is moving toward more personalised approaches. Important areas include digital phenotyping of relapse risk, just-in-time interventions triggered by patterns of spending or app use, better integration of ADHD and neurodevelopmental assessment, transdiagnostic treatments targeting impulsivity and compulsivity, and stronger evaluation of gambling-product design. Neurocognitive work continues to examine decision-making, reward processing, attentional bias and inhibitory control, but there is not yet a clinically useful brain scan or biomarker that diagnoses gambling disorder or selects treatment.

The public-health model is also likely to become more prominent. Instead of locating all responsibility in the individual, it asks how product speed, availability, advertising, affordability, credit, inducements and sports integration shape population risk. This is compatible with individual treatment: the person still makes choices, but those choices occur inside an environment that can be made safer or more hazardous.

24. Key messages

·       Gambling disorder is a recognised behavioural addiction with substantial psychiatric, financial and social morbidity.

·       Loss chasing, impaired control and continued gambling despite harm are more clinically important than gambling frequency alone.

·       ADHD and other psychiatric comorbidities are common and should be actively assessed.

·       Suicide risk is materially elevated and requires direct assessment, especially during debt, discovery or legal crises.

·       Gambling-specific CBT is first-line; motivational interviewing and peer support can improve engagement.

·       Naltrexone is a specialist second-line option in selected cases under current NICE guidance.

·       Blocking, self-exclusion, payment controls and financial restructuring are therapeutic interventions, not signs of failed motivation.

·       Families and affected others need support in their own right.

·       UK policy has moved toward independent statutory funding and stronger product-level regulation.

·       Recovery usually involves both internal change and redesigning the person’s environment so that high-risk impulses are harder to act on.

References and further reading

1. NICE NG248. Gambling-related harms: identification, assessment and management (2025). Link
2. NICE NG248 recommendations. Link
3. WHO. Gambling fact sheet and ICD-11 description. Link
4. Gambling Commission. Gambling Survey for Great Britain Annual Report 2025 (published July 2026). Link
5. Gambling Commission. Gambling Survey for Great Britain statistics hub. Link
6. Gambling Commission. Online slots stake limit guidance. Link
7. UK Government. Statutory gambling levy (updated 2026). Link
8. Wang L et al. Gambling disorder and suicide risk: a meta-epidemiology study. J Psychiatr Res. 2026. Link
9. Kristensen JH et al. Suicidality among individuals with gambling problems: a meta-analytic literature review. Psychol Bull. 2024. Link
10. Galeazzi GM et al. Psychiatric morbidity and gambling disorder: systematic review and meta-analysis. Eur Psychiatry. 2025. Link
11. Systematic review of ADHD and autism prevalence among those experiencing gambling harm. 2026. Link
12. Ioannidis K et al. Pharmacological management of gambling disorder: systematic review and network meta-analysis. Compr Psychiatry. 2025. Link
13. Sharma R, Weinstein A. Gambling disorder comorbidity: narrative review. Dialogues Clin Neurosci. 2025. Link
14. UK Government consultation: banning unlicensed gambling sponsorship (2026). Link