ADHD and Gambling Addiction: What the Research Shows

The NewsA Sentencing Puts the Medication Question on the Record

On Friday, October 16, 2026, a Bay County, Florida, judge sentenced Philip Lee Sullivan, 43, to 118.5 months in state prison for taking about $1.4 million from Royal American, the Panama City property manager where he'd been chief financial officer, to fund his gambling. While the case was pending, he ran the Florida Council on Compulsive Gambling's helpline, according to Casino.org and IBTimes.

At the hearing, his wife told the court she believed that "if it weren't for this medication, he would not have done that," referring to the prescription Adderall he'd started taking. Prosecutors presented evidence that he planned the thefts and took active steps to conceal them. Courts weigh those arguments. This article doesn't.

The hearing said out loud what many families quietly ask: did the medication do this? Behind it sits a bigger question. Does ADHD itself change the odds? There's real research on both. (If you've taken money that wasn't yours to gamble, here's a separate guide on what to do next.)

The NumbersHow Common ADHD Is in Gambling Disorder

As a baseline, a 2021 global meta-analysis by Song and colleagues estimated that 2.58% of adults have persistent ADHD that began in childhood, and 6.76% have ADHD symptoms regardless of onset. In the U.S., the CDC reported in 2024 that 6.0% of adults, about 15.5 million people, had a current diagnosis.

Inside gambling treatment:

• In Melbourne, Waluk, Youssef and Dowling found that 24.9% of 214 adults at a specialist gambling service screened positive for ADHD, against 14% in a community sample (Journal of Gambling Studies, 2016).
• A German team led by Wolfgang Retz found lifetime ADHD in 28.8% of 163 adults with gambling disorder, and 25.2% met full DSM-5 criteria (Journal of Neural Transmission, 2016).
• Austrian researchers Laura Brandt and Gabriele Fischer found that 43% of 80 treatment-seeking gamblers screened positive for childhood ADHD, which persisted into adulthood in 11% (Journal of Attention Disorders, 2019).
• In Japan, Masuo Tanaka's team found ADHD in 27.5% of 40 patients at their first gambling-disorder visit (Journal of Gambling Studies, 2023).

Timms-McLean's review, published online in June 2026, gives a 95% confidence interval of 18% to 29%.

The link runs the other way too. In England's 2007 Adult Psychiatric Morbidity Survey of 7,403 people, Louis Jacob, Josep Maria Haro and Ai Koyanagi found that 2.4% of people with ADHD symptoms had a gambling problem, against 0.6% of those without. Adjusted for age, sex and ethnicity, that's 3.57 times the odds (Journal of Behavioral Addictions, 2018).

Some caveats. Most of these studies used screening questionnaires, not full diagnoses, and treatment samples skew severe. A 2019 meta-analysis by Theule and colleagues found the correlation between ADHD symptoms and gambling severity was real but modest (r = .17).

The fair reading: ADHD shows up in gambling treatment several times more often than in the general population, and most people with ADHD never develop a gambling problem.

The MechanismWhy the Two Conditions Overlap

The best-studied overlap has a clunky name: delay discounting, how fast a reward loses value the longer you wait for it. Everyone does it. Some brains do it steeply.

Jacob N. S. Jackson and James MacKillop pooled 21 investigations covering 3,913 people and found steeper discounting in ADHD than in controls (Biological Psychiatry: CNNI, 2016). A 2021 meta-analysis by Weinsztok, Amlung and colleagues found that among behavioral addictions, the strongest evidence for steep discounting was in gambling disorder. Next month's rent feels abstract. The next thirty seconds feel enormous.

Impulsivity matters, but less than you'd guess. In the English survey, it explained 11.2% of the ADHD-gambling link. Common mental disorders such as depression and anxiety explained 22.4%, and stressful life events 13.2%. Untreated ADHD is stressful, and gambling to escape distress is one of the DSM-5 criteria for gambling disorder.

Reward circuitry may play a part. A 2014 meta-analysis by Plichta and Scheres found the brain's ventral striatum responds less to anticipated rewards in ADHD, though they call the evidence too thin to settle what that means.

Retz's patients with ADHD also reported a faster progression into gambling disorder and a sedative effect from gambling. For some people, the app works less like a thrill and more like a tranquilizer.

Then there's the product. Analyzing a 2024 Japanese survey of 29,268 people, Tokumitsu and colleagues found online casino use was among the strongest predictors of problem gambling, with or without ADHD symptoms (Addictive Behaviors). In-play bets, microbets, and slots settle in seconds and serve up the next one instantly: reward now, cost later, nothing in between. More on why sports betting hooks people and how apps keep you coming back.

The Medication QuestionWhat the Evidence Says About Stimulants

The documented cases of medication-induced gambling involve dopamine agonists such as pramipexole and ropinirole, used for Parkinson's and restless legs, plus the antipsychotic aripiprazole. We cover them in Can Your Medication Cause a Gambling Addiction? A 2023 review by Mirjam Wolfschlag and Anders Håkansson notes that pramipexole and ropinirole are selective for the D3 dopamine receptor, which could explain their higher risk.

Stimulants take a different route. The FDA label for Adderall XR says amphetamines "block the reuptake of norepinephrine and dopamine into the presynaptic neuron" and increase their release. The label, revised April 2026, carries a boxed warning about abuse, misuse and addiction. It doesn't mention gambling.

A different mechanism isn't proof of no effect. Here's what exists:

• A 2004 lab study by Zack and Poulos gave 36 people, 16 with gambling problems, a single 30 mg dose of d-amphetamine in one session and placebo in another. Amphetamine raised the gamblers' self-reported motivation to gamble (Neuropsychopharmacology). These were people already struggling, given one dose in a lab, not ADHD patients in treatment.
• A 2008 lab study led by Elise DeVito found that a single dose of methylphenidate made 21 boys with ADHD bet more conservatively on a computerized gambling task (Biological Psychiatry).
• A 2024 one-year study of 37 adults starting methylphenidate, by Giacomo Grassi and colleagues, found no change in gambling scores, but none had gambling problems to begin with.
• A 2017 study of nearly 3 million people with ADHD in U.S. insurance claims, by Quinn and colleagues, found the odds of an emergency visit involving a substance use disorder were 35% lower for men and 31% lower for women during medicated months. That's drugs and alcohol, not gambling.

So the evidence can't support saying Adderall causes gambling problems, and it can't support saying it can't contribute to them. Untreated ADHD, meanwhile, is itself on the risk list above.

If you have questions about your own medication, take them to your prescriber, and don't stop on your own. Bring dates: when you started, when the dose changed, when the gambling started or sped up.

What It ChangesGetting Help When Both Are in Play

Adult ADHD often goes unrecognized for years. The CDC found that 55.9% of U.S. adults with ADHD were diagnosed as adults. An earlier national survey led by Kessler found "the majority of cases were untreated."

Gambling researchers keep asking for the same fix. Waluk's team called on specialist gambling services to build ADHD screening and management protocols, and Brandt and Fischer said ADHD screening belongs in treatment. That's usually a sign it isn't routine yet.

The outcome research is more hopeful. In a 2024 study of 170 people in cognitive behavioral therapy at Bellvitge University Hospital in Barcelona, Cristina Vintró-Alcaraz and colleagues found that patients with ADHD symptoms dropped out and relapsed at similar rates to others. Their relapses were more severe, involving more money. In Tanaka's Japanese clinic, patients with ADHD stayed in treatment and joined mutual-support groups at higher rates. With 40 patients, treat that as a signal.

Retz's team also found suicide attempts were more frequent among gamblers with ADHD. If you've had thoughts of ending your life, reach out today. Our piece on gambling and suicide risk explains why that's never an overreaction.

Nothing here suggests ADHD makes recovery less likely. It changes what a slip can look like: faster and bigger. That's the case for barriers that work before an urge has time to argue.

Your Next StepsThree Things Worth Doing This Week

1. Ask for an adult ADHD evaluation. A psychiatrist, psychologist, or primary care clinician can assess you. The World Health Organization's Adult ADHD Self-Report Scale screener is six questions long (Kessler et al., Psychological Medicine, 2005). It's a starting point, not a diagnosis. If you also need a gambling specialist, here's how to find one.
2. Tell both clinicians. Tell your gambling counselor about the ADHD, or your suspicion of it, and tell your prescriber about the gambling, even if the two feel unconnected. Theule's team advised clinicians to watch for each condition in people with the other. Make that easy for them.
3. Put friction in front of the bet. When your brain discounts the future steeply, willpower in the moment is the weakest tool you have. Barriers set up in a calm hour do the work later: block gambling apps and sites, enroll in self-exclusion, and learn how to break the five minutes before a bet. The 30-Second Gap explains why that stretch decides so much. These are tools for not gambling, not for gambling less. A deposit limit leaves the door open. A block closes it.

Sources

1. Florida Gambling Helpline Boss Jailed for $1.4M Theft, Blames ADHD Meds, Philip Conneller, Casino.org, October 17, 2026
2. Florida Gambling Helpline Boss Jailed Over $1.4 Million Theft, Aiza Moraña, IBTimes UK, October 20, 2026
3. The prevalence of adult attention-deficit hyperactivity disorder: A global systematic review and meta-analysis, Song et al., Journal of Global Health, 2021
4. ADHD Diagnosis, Treatment, and Telehealth Use in Adults, United States, October to November 2023, Staley et al., CDC MMWR, October 10, 2024
5. The prevalence and correlates of adult ADHD in the United States, Kessler et al., American Journal of Psychiatry, 2006
6. The Relationship Between Problem Gambling and Attention Deficit Hyperactivity Disorder, Waluk, Youssef and Dowling, Journal of Gambling Studies, 2016
7. Association of attention-deficit/hyperactivity disorder with gambling disorder, Retz et al., Journal of Neural Transmission, 2016
8. Adult ADHD Is Associated With Gambling Severity and Psychiatric Comorbidity Among Treatment-Seeking Problem Gamblers, Brandt and Fischer, Journal of Attention Disorders, 2019
9. The Paradoxical Clinical Course of Persons with Gambling Disorder and Comorbid ADHD, Tanaka et al., Journal of Gambling Studies, 2023
10. A systematic review of the prevalence of ADHD and autism among those experiencing gambling harm, Timms-McLean et al., Addictive Behaviors, 2026
11. Relationship between ADHD symptoms and problem gambling: A mediation analysis among 7,403 individuals from the UK, Jacob, Haro and Koyanagi, Journal of Behavioral Addictions, 2018
12. Exploring the Relationships Between Problem Gambling and ADHD: A Meta-Analysis, Theule et al., Journal of Attention Disorders, 2019
13. ADHD and Monetary Delay Discounting: A Meta-Analysis of Case-Control Studies, Jackson and MacKillop, Biological Psychiatry: CNNI, 2016
14. Delay Discounting in Established and Proposed Behavioral Addictions: A Systematic Review and Meta-Analysis, Weinsztok et al., Frontiers in Behavioral Neuroscience, 2021
15. Ventral-striatal responsiveness during reward anticipation in ADHD, Plichta and Scheres, Neuroscience and Biobehavioral Reviews, 2014
16. Risk factors for the development of problem gambling in individuals with ADHD symptoms, Tokumitsu et al., Addictive Behaviors, 2025
17. Drug-Induced Gambling Disorder: Epidemiology, Neurobiology, and Management, Wolfschlag and Håkansson, Pharmaceutical Medicine, 2023
18. Adderall XR prescribing information, DailyMed, U.S. National Library of Medicine, revised April 2026
19. Amphetamine primes motivation to gamble and gambling-related semantic networks in problem gamblers, Zack and Poulos, Neuropsychopharmacology, 2004
20. The Effects of Methylphenidate on Decision Making in ADHD, DeVito et al., Biological Psychiatry, 2008
21. Long-term changes on behavioral addictions symptoms among adults with ADHD treated with methylphenidate, Grassi, Moradei and Cecchelli, Journal of Behavioral Addictions, 2024
22. ADHD Medication and Substance-Related Problems, Quinn et al., American Journal of Psychiatry, 2017
23. Do attention-deficit/hyperactivity symptoms influence treatment outcome in gambling disorder?, Vintró-Alcaraz et al., Comprehensive Psychiatry, 2024
24. The World Health Organization Adult ADHD Self-Report Scale (ASRS): a short screening scale for use in the general population, Kessler et al., Psychological Medicine, 2005