Alcohol-related brain damage

Drinking a lot of alcohol for many years can harm the brain. Doctors call this alcohol-related brain damage, or ARBD. It can cause memory loss, poor judgment, trouble with balance and changes in mood.³

There is real hope here. Unlike Alzheimer's disease, alcohol-related brain damage usually does not keep getting worse once a person stops drinking and gets good care. Many people get better over months or years.^3,4 This page explains the main forms, the vitamin that matters most, and how to get help.

What is alcohol-related brain damage?

Alcohol-related brain damage is an umbrella term. It covers several problems that heavy drinking can cause in the brain.^3,4 The main ones are:

• Alcohol-related dementia. A slow loss of thinking skills from long-term heavy drinking. Many experts now prefer the term "brain damage" or "brain injury," because the problem usually stops getting worse after drinking stops.^3,4
• Wernicke-Korsakoff syndrome. Damage from a severe lack of thiamine (vitamin B1). It has a sudden, emergency stage (Wernicke encephalopathy) and a long-lasting memory stage (Korsakoff syndrome).^1,2
• Other harm linked to drinking. This includes head injuries from falls and strokes related to alcohol.³

Many people have more than one of these at the same time.¹

Who is at risk

Brain damage from alcohol usually follows many years of heavy drinking. Binge drinking (a lot of alcohol in one sitting) seems to be especially harmful. Poor eating raises the risk, because the body runs short of vitamins.³ Doctors still do not know why some heavy drinkers develop it and others do not.³

It is often found between about ages 40 and 60. That is younger than most other causes of dementia. More men than women are affected, because more men drink heavily.³ People who are socially isolated are also more often affected.⁴

Older adults. As we age, the brain becomes more sensitive to alcohol. Heavy drinking in later life can make memory problems worse.³ In 2024, more than half of Americans 65 and older (57.5%) drank in the past year. About 1 in 9 had a binge drinking episode in the past month. About 1 in 20 (4.8%) had an alcohol use disorder.⁷ Read more in Alcohol in later life.

It is often missed. Experts estimate that about 80% of cases of Wernicke-Korsakoff syndrome go undiagnosed.² Studies suggest alcohol-related dementia makes up about 10% to 24% of dementia cases in nursing homes, but only 3% to 5% in memory clinics.⁴ This gap suggests many people are never correctly diagnosed.

Wernicke encephalopathy: an emergency

Wernicke encephalopathy (say "VER-nik-ee en-sef-uh-LOP-uh-thee") is a sudden brain illness. It happens when the brain does not have enough thiamine to make energy.¹ Possible signs include:^2,6

• Confusion, sleepiness or not knowing where you are
• Unsteady, wide or staggering walk, or poor coordination
• Eye problems, such as jerky eye movements, double vision or drooping eyelids
• Very low energy, low body temperature, low blood pressure, or coma

Doctors were taught to look for three signs together: confusion, unsteady walking and eye problems. But only about 1 in 10 to 1 in 6 people have all three at once.⁵ So the illness is easy to miss, especially when someone also seems drunk or is going through withdrawal.¹

Korsakoff syndrome: long-lasting memory loss

Korsakoff syndrome often follows Wernicke encephalopathy, but it can also appear without it.¹ Its main signs are:^1,2

• Trouble making new memories. The person may not remember a talk from an hour ago.
• Gaps in older memories.
• Confabulation. This means filling memory gaps with made-up stories. The person is not lying on purpose. They believe what they are saying.
• Low motivation and flat feelings, and trouble planning or finishing tasks.
• Sometimes hallucinations (seeing or hearing things that are not there).

A person with Korsakoff syndrome may still chat well and seem fine in short visits. Other thinking and social skills can stay fairly strong while memory is badly damaged.¹ Families sometimes find this confusing.

Alcohol-related dementia

Alcohol-related dementia develops more slowly. It tends to affect:^3,4

• Planning and judgment. Trouble organizing tasks, solving problems or seeing risks.
• Memory. Forgetting recent talks or events.
• Sense of space. Trouble judging distance, finding the way or copying a drawing.
• Mood and behavior. Apathy (not caring), depression or acting on impulse.
• Movement. Stumbling, falls and slurred speech, even when sober.

Language is often less affected than in Alzheimer's disease.⁴ Many people do not realize how serious their problems are.³

Thiamine: the vitamin that matters most

Thiamine helps brain cells turn food into energy. Heavy drinking lowers thiamine in two ways. People who drink heavily often eat poorly, and alcohol makes it harder for the gut to absorb the vitamin.^2,3

Low thiamine is not only a drinking problem. It can also happen with weight-loss (bariatric) surgery, long-lasting vomiting, cancer and chemotherapy, kidney dialysis, eating disorders and some long illnesses.^2,6 So anyone with these conditions and sudden confusion needs a quick check.

Treatment. In the hospital, thiamine is given by IV or shot as soon as possible. It can improve confusion, eye problems and balance.⁶ Doctors may then give thiamine by mouth for weeks, along with other vitamins, magnesium, food and fluids.^1,2 Treatment often cannot undo the memory loss of Korsakoff syndrome, which is why speed matters so much.⁶

For people who still drink. Thiamine and a healthy diet may lower the risk, but they do not remove it.⁶ Ask your doctor whether a thiamine supplement is right for you. Do not count on vitamins to protect the brain from heavy drinking.

Can it get better?

Yes, often. This is the biggest difference from Alzheimer's disease and other dementias that keep getting worse.

In one two-year study in nursing homes, people with alcohol-related dementia stayed the same or got better. People with Alzheimer's and vascular dementia mostly got worse.⁴

For Korsakoff syndrome, long-term data are limited. One estimate is:¹

Some skills come back faster than others. Speech and word skills may recover sooner. Planning and space skills may take longer, and some problems may remain.⁴ After Wernicke treatment, eye problems can improve within days. Balance and confusion often take months.¹

How it is diagnosed

There is no single test for alcohol-related brain damage. Doctors make the diagnosis from the person's history, symptoms and exam.^1,2 They may use:

• Questions about drinking. Any check-up for memory problems should include questions about alcohol.¹ Try to answer openly. It helps the doctor find a cause that can improve.
• Memory and thinking tests. See memory and thinking tests.
• Blood tests, such as vitamin and liver tests.⁶
• A brain MRI, which can show changes. In an emergency, thiamine should never wait for a scan.^2,6 See brain scans.

Being drunk, going through withdrawal, an infection or a head injury can all hide or mimic the signs.¹ So doctors often look again after the person has been sober for a while.⁴ They also check for other treatable causes. See treatable conditions that look like dementia.

Stopping drinking safely

Stopping alcohol is needed at every stage to prevent more brain damage.² But a person who drinks heavily every day should not stop suddenly on their own.³

Help that can make quitting easier:

• Your doctor. Ask about medical help for withdrawal and about medicines and counseling for alcohol use disorder. Do not start or stop any medicine without talking to your doctor or pharmacist.
• The SAMHSA National Helpline: 1-800-662-4357. It is free and open 24 hours a day, every day of the year, in English and Spanish.⁸
• The NIAAA Alcohol Treatment Navigator (alcoholtreatment.niaaa.nih.gov). This government guide, with no commercial sponsors, helps you find and compare good-quality treatment for yourself or a loved one.⁹
• Support groups for the person and for family. See support groups and peer support.

Living with ARBD and caring for someone

Recovery takes time and support. A safe, sober setting with good food and a steady routine gives the brain its best chance.^2,3

People with severe Korsakoff syndrome often need long-term supported living or residential care.^1,2 This is not a failure. It can keep the person safe and sober while the brain recovers.

Depression is common in people with ARBD.³ Family members can feel worn down too. Shame and stigma can keep families from asking for help. Alcohol use disorder is a health condition, not a moral failing. Caregivers need support too. See caregiver stress and burnout and depression.

Common questions

Is alcohol-related brain damage the same as dementia?

Not quite. It can look like dementia, and some doctors call it alcohol-related dementia. But it usually stops getting worse once drinking stops, and many people improve. That is why many experts call it a brain injury instead.^3,4

How much drinking causes brain damage?

There is no exact safe line, and it differs from person to person. Most people diagnosed with ARBD drank far more than health limits for many years.³ For later-life limits and why older adults are more sensitive, see Alcohol in later life and Sleep, alcohol and smoking.

Is it too late to stop drinking at 65 or 75?

It is never too late to ask for help. After quitting, improvement can continue for years.⁴ Get medical help to stop safely.²

My father makes up stories. Is he lying?

Probably not. Confabulation is a symptom of Korsakoff syndrome. The brain fills memory gaps without the person knowing.¹ Arguing usually does not help. Gently steer the talk and keep notes of real events.

When to get help

• Call 911 for sudden confusion, staggering, odd eye movements, a seizure, severe withdrawal signs, or if a person cannot be woken up.
• Call or text 988 if you or the person is thinking about suicide or is in an emotional crisis. See when a family member is in a mental health crisis and get help now.
• See a doctor soon if someone who drinks heavily has new memory problems, falls, or confusion that comes and goes.
• Return to the doctor if symptoms come back or get worse.⁶

Education only. This page is general information written from the sources listed. It is not medical, legal or financial advice and does not replace a doctor, therapist or lawyer who knows your situation. How we write and check pages.