What Is Alcohol Dependency? Causes, Genes and Signs
By Rethink Drink.
Alcohol dependency is when drinking has become hard to regulate.
It's harder to control when you start and when you stop. Drinking takes up more and more space in your life. And often your body has adapted to alcohol, so you feel unwell without it.
It isn't a moral failing. It grows out of a mix of genes, life experience, mental health, and how much and how long you've been drinking.
Only a clinician can diagnose it. But you can get a good starting picture yourself, and this page shows you how.
If you've landed here, you might be asking yourself a quiet question you haven't said out loud yet. Or you might have already tried AA, an app, a few dry months... and you're wondering why none of it stuck.
On calls, people describe it in their own words: "I have no switch button anymore."
That's a very good description of what dependency feels like from the inside.
In short
Dependency is a disorder of regulation. Impaired control, drinking becoming a priority, and your body adapting to alcohol are its three main features.
Physical and psychological dependence often go together. Physical means tolerance and withdrawal. Psychological means the loss of control and the pull of the habit.
Genes play a big part. Twin and adoption studies put about half of the differences in risk between people down to genes. Genes raise the risk; they don't decide your future.
Life matters too. Difficult childhood experiences, anxiety and depression, stress, and years of regular heavy drinking all raise the risk.
A test can flag it, not diagnose it. An AUDIT score of 20 or more suggests possible dependence and is a reason to get a proper assessment.
Check first: if your body depends on alcohol, stopping or cutting down too fast can be dangerous. Speak to your GP (General Practitioner) or local alcohol service before you change anything...
...Our free units calculator and AUDIT-C check give you a starting picture in a couple of minutes. They can't tell you whether your body depends on alcohol; a doctor can.
What is alcohol dependency?
The UK's clinical guidelines for alcohol treatment define alcohol dependence as "a disorder of regulation of alcohol use arising from repeated or continuous use of alcohol" (DHSC, 2025).
In plain words: drinking has become hard to steer.
The UK definition comes from the World Health Organization's ICD-11 (code 6C40.2). It describes three features:
Impaired control. Over when you start, how much you drink, where, and when you stop.
Alcohol becoming an increasing priority. Drinking comes before other interests, responsibilities and looking after yourself, often carrying on despite problems.
Physical features. Tolerance, withdrawal when you stop or cut down, or drinking to ease withdrawal.
These are usually evident over at least 12 months, or at least three months if someone has been drinking daily or almost daily. They often come with a strong urge or craving to drink.
And dependency doesn't look the way most people imagine.
When Matt, our co-founder, first dreamt up Rethink Drink, he pictured the man on a park bench, drinking out of a paper bag. The reality is very different. Most of the people we work with are holding it all together... from the outside, they look like they're doing well. But, like Matt was, they're crumbling inside, and desperate to find a way.
What's the difference between physical and psychological dependence?
You'll hear both terms. They're two sides of the same thing, and they often go together.
Physical dependence is your body adapting to alcohol. You need more to get the same effect (tolerance). And when you stop or cut down, you get withdrawal symptoms. The NHS lists these as anxiety, trouble sleeping, nausea and vomiting, a racing heartbeat, sweating and tremor, and in severe cases hallucinations, confusion and seizures.
Psychological dependence is the loss of control and the pull of the habit. Thinking about the next drink. Planning around it. Feeling you can't relax, sleep or cope without one. The routine that runs on autopilot at the same time every evening.
You can have a lot of the psychological side with very little of the physical: no shakes, but no off switch either.
What are the signs of alcohol dependency?
The NHS lists these signs of alcohol-use disorder:
Regularly drinking more than you meant to
Not being able to cut down or stop, even when you want to
Feeling guilty or full of remorse after drinking
People close to you being worried about your drinking
Carrying on drinking despite problems with your health, work or relationships
Craving, such as needing a drink when you wake up
Needing more alcohol to get the same effect
Withdrawal symptoms when you stop or cut down
The NHS says withdrawal symptoms are a sign your body is dependent on alcohol.
What causes alcohol dependency?
There's no single cause. It's usually several things stacking up.
A learned reward. When you drink, alcohol releases endorphins, your body's own feel-good chemicals. A small brain-scan study showed this happening in people as they drank, and more release went with more pleasure (Mitchell and colleagues, 2012). Repeat that over months and years, and the brain learns that alcohol matters. Not as a choice you make. As a routine wired in underneath your choices.
Genes. A big review pooled 12 twin studies and five adoption studies. It found alcohol use disorder is roughly 50% heritable, with genes accounting for 49% of the differences in risk between people (Verhulst, Neale and Kendler, 2015). Family environment played a smaller part.
That doesn't mean your future is written. It means some people start this race carrying a lot more weight than others.
Childhood and life experiences. A Public Health Wales study of 2,028 adults found that people who'd had four or more adverse childhood experiences (things like abuse, parents separating, or growing up around domestic violence, mental illness, or alcohol or drug problems at home) were 4.4 times more likely to be high-risk drinkers than people who'd had none (Bellis and colleagues, 2015).
Mental health and stress. People with common mental health conditions like anxiety and depression are around twice as likely to have an alcohol problem (Alcohol Change UK). A drink can bring quick relief, which is exactly why it can become a habit. The Mental Health Foundation says relying on alcohol to manage anxiety can mean drinking more over time, and can lead to dependence.
How much, how often, and for how long. Dependence comes from "repeated or continuous use". Regular drinking, over time, is what teaches the body tolerance and the brain the habit. That's why it so often creeps in. On calls, people tell us it "started creeping in every day".
It isn't a lack of willpower. You have willpower everywhere else in your life. Willpower is the wrong weapon in this battle.
Is alcohol dependency a disease?
The UK's clinical guidelines describe alcohol dependence as "often a long-term condition that can involve cycles of abstinence and relapse" (DHSC). They tell services to be non-judgemental and to work to reduce stigma, because stigma is a major barrier to people asking for help.
Whatever label you prefer, it isn't a character flaw.
How common is alcohol dependency in the UK?
More common than most people think.
The government estimates there were 608,416 adults with alcohol dependence in England in 2019 to 2020. That's around 14 in every 1,000 adults (Office for Health Improvement and Disparities, 2024).
Am I dependent on alcohol?
You can get a good starting picture in a few minutes.
The UK's guidelines call the AUDIT (Alcohol Use Disorders Identification Test) the gold standard for spotting alcohol problems (DHSC). It has ten questions. The first three make up a shorter check, the AUDIT-C. If you score 5 or more on the AUDIT-C, the full AUDIT is the next step.
Here's what the full AUDIT score means:
AUDIT score | What it suggests |
|---|---|
0 to 7 | Lower risk |
8 to 15 | Increasing risk (hazardous drinking) |
16 to 19 | Higher risk (harmful drinking) |
20 or more | Possible alcohol dependence |
Bands from the UK clinical guidelines for alcohol treatment.
The guidelines say a score of 20 or more means you're likely to have at least some level of dependence, and should be offered a specialist assessment.
But they're also clear: "AUDIT is not a diagnostic tool." A diagnosis needs a clinician with the right skills.
...Start with our free AUDIT-C check and units calculator. Then take your score to your GP. It helps them understand your situation quickly.
Is it dangerous to stop drinking if I'm dependent?
It can be. Please take this part seriously.
The NHS says it can be very dangerous to stop drinking suddenly if you're dependent on alcohol. Withdrawal symptoms typically start 6 to 12 hours after your last drink and usually last 3 to 7 days.
If you get withdrawal symptoms, the NHS says to get medical help before you try to stop. And it advises calling 999 or going to A&E for severe withdrawal, such as seizures, hallucinations or confusion.
Your GP or local alcohol service can help you cut down or stop safely, sometimes with a medically supported withdrawal.
What help is there for alcohol dependency?
More than most people realise. The NHS lists:
Your GP or a local alcohol service. You can search for services near you.
Talking therapies, such as CBT (cognitive behavioural therapy).
Medical support for withdrawal.
Medicines to reduce craving or prevent relapse, such as acamprosate and naltrexone. On the NHS, these are usually taken daily once you've stopped drinking, to help you stay stopped. ...How they compare: Acamprosate vs naltrexone.
Support groups, such as Alcoholics Anonymous and SMART Recovery.
Help for family and friends, through Al-Anon UK, SMART Recovery's family programme or Adfam. ...See also Supporting a loved one.
There's also the route Matt took himself, The Sinclair Method, where naltrexone is used a different way: taken before drinking, at a time your prescriber sets, so the brain slowly unlearns the reward over time. It's outside naltrexone's UK licence, it isn't for everyone, and it needs proper support alongside. What is The Sinclair Method? explains it honestly.
...If you want to ask your GP about medication, start with Can I get naltrexone from my GP or the NHS?
Common questions
What is the difference between alcohol abuse and alcohol dependence?
UK guidelines now talk about harmful drinking (drinking that has already damaged your physical or mental health) and dependence (losing control over drinking, often with tolerance and withdrawal). Both come under the umbrella of alcohol use disorder.
Is alcohol dependency genetic?
Partly. Twin and adoption studies suggest genes account for about half of the differences in risk between people. Your experiences, mental health and drinking pattern matter too.
Can you be dependent on alcohol without drinking every day?
It's possible. Dependence is about control and priority as well as the body, and the ICD-11 criteria look at your pattern over months, not only at whether you drink daily. If you can't stop once you start, that's worth talking to your GP about.
Am I an alcoholic?
The NHS says people sometimes call alcohol-use disorder "alcoholism". Whatever word you use, the AUDIT is a good place to start. It's a screening test, not a diagnosis, so a high score is a reason to see your GP.
Can alcohol dependency be treated?
Yes. Talking therapies, medication, support groups and specialist services all help people. It's often a long-term condition, so setbacks along the way are common and aren't a sign of failure.
If you'd like support from us
Rethink Drink is a UK coaching service built around The Sinclair Method. Our programmes include a consultation with an independent prescriber, who decides whether treatment is suitable for you. Any prescription is dispensed by an independent partner pharmacy. Our coaches work with you, week by week, on everything around it.
And whatever happens, you can talk to someone today. Drinkline, the national alcohol helpline, is free and confidential: 0300 123 1110.
Please look after yourself
This page is here to help you understand what's going on and what your options are. It isn't medical advice, and it can't replace a conversation with a doctor who can ask qualifying questions.
Before you change how much you drink or start any medication, speak to your GP or a prescriber.
If you're struggling with low mood or thoughts of harming yourself, Samaritans are free, any time, on 116 123.
We really hope this post helps. If you have any questions, you can contact us here.
The Rethink Drink team
Sources
Department of Health and Social Care. UK clinical guidelines for alcohol treatment: glossary (published 28 November 2025). https://www.gov.uk/guidance/clinical-guidelines-for-alcohol-treatment/glossary
Department of Health and Social Care. UK clinical guidelines for alcohol treatment, chapter 2: principles of care. https://www.gov.uk/guidance/clinical-guidelines-for-alcohol-treatment/2-principles-of-care
Department of Health and Social Care. UK clinical guidelines for alcohol treatment, chapter 3: identification and brief interventions (last updated 17 April 2026). https://www.gov.uk/guidance/clinical-guidelines-for-alcohol-treatment/3-identification-and-brief-interventions
World Health Organization. ICD-11 for Mortality and Morbidity Statistics: 6C40.2 Alcohol dependence. https://icd.who.int/browse/2025-01/mms/en#1580466198
NHS. Alcohol-use disorder (page last reviewed 24 April 2026). https://www.nhs.uk/conditions/alcohol-use-disorder/
Mitchell JM and colleagues. Alcohol consumption induces endogenous opioid release in the human orbitofrontal cortex and nucleus accumbens. Science Translational Medicine, 2012 (summary, Neuroscience News). https://neurosciencenews.com/endorphins-alcohol-brain-research-addiction
Verhulst B, Neale MC, Kendler KS. The heritability of alcohol use disorders: a meta-analysis of twin and adoption studies. Psychological Medicine, 2015; 45(5): 1061 to 1072. https://arc.vcu.edu/publications-2014-2016/the-heritability-of-alcohol-use-disorders-a-meta-analysis-of-twin-and-adoption-studies.html
Bellis MA, Ashton K, Hughes K, Ford K, Bishop J, Paranjothy S. Adverse Childhood Experiences and their impact on health-harming behaviours in the Welsh adult population. Public Health Wales and Liverpool John Moores University, 2015. https://www.wao.gov.uk/sites/default/files/2020-12/ACE_Report_FINAL.pdf
Alcohol Change UK. Alcohol and mental health (fact sheet). https://alcoholchange.org.uk/alcohol-facts/fact-sheets/alcohol-and-mental-health
Mental Health Foundation. Alcohol and mental health. https://www.mentalhealth.org.uk/explore-mental-health/a-z-topics/alcohol-and-mental-health
Office for Health Improvement and Disparities. Estimates of alcohol dependent adults in England: summary (14 March 2024). https://gov.uk/government/publications/alcohol-dependence-prevalence-in-england/estimates-of-alcohol-dependent-adults-in-england-summary
NHS. Find alcohol addiction support services. https://www.nhs.uk/nhs-services/find-alcohol-addiction-support-services/
