Alcohol withdrawal can begin within about 6 hours of the last drink, usually peaks between 24 and 72 hours, and is one of the few kinds of withdrawal that can become life threatening.

For most people the acute symptoms ease within 5 to 7 days, but severe cases can bring seizures or delirium tremens and need medical care. How dangerous it gets depends on how much and how long someone has been drinking, their age, and their overall health.

This guide is for education, not a substitute for medical advice, and it is not a plan for detoxing alone. If someone is in withdrawal right now with seizures, severe confusion, chest pain, or a high fever, treat it as an emergency and call 911. If you are worried about your own drinking, our overview of alcohol addiction treatment is a good place to start.

What Is Alcohol Withdrawal?

Alcohol withdrawal is the set of physical and mental symptoms that appear when someone who drinks heavily and regularly cuts back or stops. Alcohol is a depressant, so the brain adapts by ramping up its own excitatory activity. Take the alcohol away and that revved-up nervous system has nothing to push against, which is why the early symptoms look like a body in overdrive: racing heart, tremor, sweating, and anxiety.

Withdrawal affects roughly half of people with alcohol use disorder who stop or significantly cut down, according to the Cleveland Clinic. The highest risk is in people who drink large amounts daily over months or years. If you are still working out whether the drinking has crossed a line, our guides on binge drinking versus alcohol addiction and signs you may need help are useful starting points.

Alcohol Withdrawal Timeline: What to Expect

Everyone is a little different, but withdrawal tends to follow a fairly predictable arc. Symptoms can start within about 6 hours of the last drink and generally peak around 24 to 72 hours in, based on clinical summaries from StatPearls (National Library of Medicine).

Time since last drink	Stage	What tends to happen
6 to 12 hours	Early withdrawal	Headache, mild anxiety, tremor, sweating, nausea, and trouble sleeping
12 to 24 hours	Symptoms build	Symptoms intensify; some people develop alcoholic hallucinosis while otherwise alert
24 to 48 hours	Peak seizure risk	Seizure risk is highest; tremor, high blood pressure, and rapid heartbeat often peak
48 to 72 hours	Peak and possible DTs	Overall symptoms peak; delirium tremens, the most dangerous form, can begin
72 hours and beyond	Easing, or DTs continuing	For most people symptoms settle; severe delirium tremens can persist and needs hospital care
Weeks to months	Protracted withdrawal (PAWS)	Lingering insomnia, mood swings, anxiety, and cravings that fade gradually

For most people the acute physical symptoms run their course in about 5 to 7 days, with the peak around days 2 and 3. The lingering symptoms of protracted withdrawal, mainly sleep and mood problems, can take weeks to months to fully lift.

When Alcohol Withdrawal Becomes Dangerous

Most withdrawal is uncomfortable rather than dangerous, but three things can turn it serious. Withdrawal seizures usually strike between 6 and 48 hours after the last drink, with the highest risk in the 24 to 48 hour window, and they can happen even in someone who has never had a seizure before. Delirium tremens, or DTs, is the most severe form. It usually begins 48 to 72 hours after the last drink and brings deep confusion, vivid hallucinations, fever, and a racing heart. Only about 3 to 5 percent of people in withdrawal develop it, but the Cleveland Clinic notes that even with treatment around 5 to 10 percent of those who do can die from it, which is why severe withdrawal should never be ridden out alone.

There is also a pattern called kindling. Each time a person goes through unmanaged withdrawal, the next episode tends to be worse, because repeated episodes appear to lower the seizure threshold over time. Trying to white-knuckle detox at home again and again can make each attempt more dangerous than the last, which is a strong reason to seek medical support.

Can You Detox From Alcohol at Home?

It depends entirely on the person. Someone who drinks moderately with no history of complicated withdrawal may get through it with rest, fluids, and a supportive person nearby. For anyone who drinks heavily every day, has withdrawn before, or has other health problems, home detox can be genuinely dangerous. Some signs mean a person should be assessed by a clinician before stopping, and ideally have medically supervised withdrawal:

• Heavy daily drinking sustained over months or years.
• A past withdrawal seizure or episode of delirium tremens.
• Previous hard quit attempts that brought on bad symptoms.
• Older age, generally over 65.
• Liver disease or other serious medical conditions.
• Co-occurring mental health conditions or use of other substances.
• No safe, sober person available to monitor them.

If any of these apply, please talk to a professional first. You can reach out to Thrive Medical for a confidential assessment, and we can help you figure out the safest path.

How Medically Supervised Withdrawal Works

Supervised withdrawal, sometimes called detox, keeps a person safe and comfortable while their body clears the alcohol. The mainstay of treatment is a class of medicines called benzodiazepines, such as diazepam or lorazepam, which calm the overactive nervous system and lower the risk of seizures and DTs. Doctors also give thiamine, which is vitamin B1, because heavy drinkers are often deficient and low thiamine can lead to a serious brain condition, along with fluids and electrolytes. Clinicians often use a tool called the CIWA-Ar to score symptom severity and guide how much medication a person needs.

Detox is only the first step. Getting through withdrawal does not treat the underlying alcohol use disorder, so it works best when it flows into ongoing care. Medications like naltrexone and acamprosate, offered as part of medication-assisted treatment, can reduce cravings, and structured follow-up through an outpatient rehab program helps people stay well after the acute phase passes.

Getting OHIP-Covered Alcohol Treatment in Ontario

Thrive Medical is a Rapid Access Addiction Medicine (RAAM) clinic serving North York and the Greater Toronto Area, with virtual appointments available across Ontario. RAAM clinics let people get help quickly, often without a formal referral, and assessment and treatment for alcohol use disorder are covered by OHIP for eligible patients.

You can learn more about alcohol addiction treatment or review which addiction treatments are covered by OHIP. If you or someone you care about is ready to start, our team can usually see new patients quickly.

Frequently Asked Questions

What are the first signs of alcohol withdrawal?

The earliest signs usually appear about 6 to 12 hours after the last drink and include anxiety, shakiness or tremor, sweating, headache, nausea, a racing heart, and trouble sleeping. Many heavy drinkers notice these symptoms in the morning and feel the urge to drink to relieve them.

How long does alcohol withdrawal last?

Acute symptoms usually last about 5 to 7 days and peak around days 2 and 3. Milder cases can pass in a few days. Lingering effects like poor sleep, low mood, and cravings, known as protracted withdrawal, can continue for weeks or months.

When do alcohol withdrawal symptoms peak?

For most people symptoms peak between 24 and 72 hours after the last drink. Seizure risk is highest in the 24 to 48 hour window, and delirium tremens, when it occurs, tends to begin around 48 to 72 hours.

Can you die from alcohol withdrawal?

Yes, though it is uncommon. Severe withdrawal can cause seizures and delirium tremens, which can be fatal if untreated. With prompt medical care the risk drops sharply, which is why heavy drinkers should not stop suddenly without a clinical assessment.

What are delirium tremens?

Delirium tremens, or DTs, is the most severe form of alcohol withdrawal. It brings severe confusion, hallucinations, agitation, fever, and a rapid heartbeat, usually starting 48 to 72 hours after the last drink. It is a medical emergency that requires hospital care.

Is it safe to detox from alcohol at home?

It can be safe for light drinkers with no history of complicated withdrawal, but it is risky for heavy daily drinkers or anyone with prior seizures, DTs, or serious health conditions, who should be assessed by a clinician and may need medically supervised withdrawal.

Sources

• Cleveland Clinic. Alcohol Withdrawal.
• StatPearls, National Library of Medicine. Alcohol Withdrawal.
• American Academy of Family Physicians (AAFP). Outpatient Management of Alcohol Withdrawal Syndrome.
• National Institute on Alcohol Abuse and Alcoholism (NIAAA). Alcohol Use Disorder.
• META:PHI. Rapid Access Addiction Medicine (RAAM) clinics.
• Canadian Centre on Substance Use and Addiction (CCSA). Canada’s Guidance on Alcohol and Health.

Last reviewed: August 2026. This article is for general educational purposes and does not replace medical advice. Talk to a licensed healthcare provider about your specific situation. If you or someone else may be experiencing severe alcohol withdrawal, seizures, or delirium tremens, call 911.