Stages of Alcohol Detox: A Timeline of What Happens to Your Body

If you’re planning to stop drinking — or helping someone who is — the question underneath all the others is usually simple: what is actually going to happen to my body, and when?

This guide walks through the alcohol detox timeline stage by stage, from the first few hours after your last drink through the days that follow. According to the National Institute on Alcohol Abuse and Alcoholism (NIAAA), roughly 27.9 million people ages 12 and older — about 1 in 10 — had alcohol use disorder (AUD) in 2024. Yet only about 7.6% of people with AUD — around 2.1 million — received any treatment that year. One of the biggest reasons people don’t get help is fear of withdrawal. Knowing what to expect takes some of the fear out of it.

One thing to be direct about up front: for someone who has been drinking heavily or for a long time, alcohol withdrawal can be genuinely dangerous — even life-threatening. It is one of the few withdrawal syndromes that can kill. That’s why the timeline below is a guide to understanding the process, not a manual for going through it alone. Medically supervised alcohol addiction treatment is the safest way to detox.

What is alcohol detox?

Alcohol detox is the first step in treating alcohol use disorder (AUD). Many people are apprehensive about quitting alcohol due to the fear of withdrawal symptoms. Withdrawal symptoms are symptoms that occur when a person who is physically dependent on alcohol reduces or stops drinking. They develop because of changes in the levels of excitatory and inhibitory neurotransmitters in the central nervous system. The brain, which has become accustomed to alcohol, is unable to cope when alcohol is suddenly withdrawn, resulting in a range of physical and psychological symptoms. During a medically-supervised alcohol detox, a multidisciplinary healthcare team keeps you as comfortable as possible by managing your withdrawal symptoms. The team also manages any medical complications that arise during alcohol withdrawal.

Alcohol detox timeline at a glance

Alcohol withdrawal symptoms can begin as early as 6 hours after the last drink and, for most people, run their acute course over 5 to 7 days. Symptoms typically peak between 24 and 72 hours. Here’s how the stages generally unfold:

Stage	Time since last drink	What’s happening in your body	Common symptoms
Stage 1	6–12 hours	The nervous system, used to alcohol’s sedating effect, becomes over-excited	Headache, anxiety, insomnia, mild tremor (“the shakes”), nausea, sweating
Stage 2	12–24 hours	Over-excitation intensifies; vital signs may rise	Higher heart rate and blood pressure, confusion, mood swings; some people have brief hallucinations
Stage 3	24–48 hours	Peak risk window for withdrawal seizures	Continued tremor and agitation, disorientation, and the highest seizure risk of the whole timeline
Stage 4	48–72+ hours	Peak symptoms; small share progress to delirium tremens (DTs)	Fever, severe confusion, rapid heartbeat, profound agitation, hallucinations, seizures
Post-acute	Weeks to months	The brain slowly recalibrates after the acute phase	Sleep problems, mood changes, low energy, intermittent cravings

Every person moves through this differently. How far someone progresses — and how severe it gets — depends on their drinking history, health, and other factors covered further down.

Stage 1: 6–12 hours after your last drink

The first symptoms are usually the mildest, but they arrive faster than many people expect. Within 6 to 12 hours you may notice headache, mild anxiety, trouble sleeping, an upset stomach, sweating, and a fine tremor in the hands — what many people call “the shakes.”

These early symptoms happen because your brain has spent months or years adapting to alcohol, which slows the nervous system down. Take the alcohol away and the nervous system swings the other way, into overdrive. Uncomfortable as this stage is, it’s the body doing exactly what you’d expect.

Stage 2: 12–24 hours after your last drink

As you move past the 12-hour mark, symptoms tend to build. Heart rate and blood pressure can climb, and some people become confused or experience noticeable mood swings. A minority begin to have hallucinations — seeing, hearing, or feeling things that aren’t there.

Alcohol hallucinosis at this stage can be frightening, but it is distinct from the hallucinations of delirium tremens later on. This is the point where at-home detox starts to become risky, because it’s hard to predict who will escalate and who won’t.

Stage 3: 24–48 hours after your last drink

This is the window when the risk of a withdrawal seizure is at its highest. Some symptoms from earlier stages begin to ease after peaking, while others — agitation, confusion, hallucinations — continue.

Withdrawal seizures are one of the clearest reasons alcohol detox belongs under medical supervision. In a treatment setting, clinicians can prevent and control them with medication. To understand why they happen and who is most at risk, see our detailed guide to alcohol withdrawal seizures.

Stage 4: 48–72+ hours — delirium tremens (DTs)

The most severe form of alcohol withdrawal is delirium tremens, and it usually appears 48 to 72 hours after the last drink. DTs are relatively uncommon — they affect fewer than 5% of people going through alcohol withdrawal — but when they occur, they are a medical emergency.

Symptoms of delirium tremens include high fever, severe confusion and disorientation, a racing heart, heavy sweating, profound agitation, vivid hallucinations, and seizures. Historically, untreated DTs carried a mortality rate reported as high as 15%. With prompt medical care that figure drops to roughly 1–4% — which is exactly why supervision matters.

You’re at higher risk of DTs if you’ve been drinking heavily for many years, have quit abruptly (“cold turkey”) before, have a history of withdrawal seizures, or have other medical conditions such as liver or heart disease. People who develop DTs often need intensive, sometimes ICU-level, monitoring and care.

After the acute stage: post-acute withdrawal (PAWS)

For most people the physical symptoms of alcohol withdrawal resolve within a couple of weeks. But some experience a longer, quieter second phase known as post-acute withdrawal syndrome (PAWS) — lingering sleep trouble, mood swings, low motivation, difficulty concentrating, and cravings that come and go for months as the brain continues to heal.

PAWS is neurological, not a lack of willpower, and it’s one of the most common reasons people relapse in early recovery. Understanding it — and having support through it — makes a real difference. (PAWS follows withdrawal from several substances; for the broader picture, see our guide to drug detox.)

What affects how long alcohol detox takes?

Two people can quit drinking on the same day and have very different experiences. The main factors that shape the timeline and severity are:

How long and how heavily you’ve been drinking. Longer, heavier use generally means a more intense, longer withdrawal. Someone who has drunk heavily for years is far more likely to move into the later, riskier stages than someone with a shorter history.

Whether other substances are involved. Using other drugs alongside alcohol can complicate and prolong withdrawal, and it often calls for more specialized medical management.

Co-occurring mental health conditions. Anxiety, depression, OCD, PTSD, and bipolar disorder can all make withdrawal harder and recovery more complicated. Treating both at once matters — which is why Discover Recovery specializes in co-occurring disorder treatment rather than addressing addiction and mental health separately.

Why alcohol detox shouldn’t be done alone

It’s tempting to try to quit at home, quietly, without involving anyone. With alcohol specifically, that instinct can be dangerous. Symptoms can escalate quickly and unpredictably, and the most serious complications — seizures and delirium tremens — can develop before you realize how far things have gone.

There’s a second trap, too: withdrawal symptoms are relieved almost immediately by drinking again, which makes relapse likely for anyone trying to white-knuckle it alone. In a medical detox program, a clinical team keeps you comfortable, uses medication to prevent seizures and manage symptoms, monitors your vital signs around the clock, and treats complications the moment they appear. Detox is also just the first step — it clears alcohol from the body but doesn’t treat the addiction itself, which is why most people move from detox into residential treatment or another structured program.

When should you seek help to overcome alcohol addiction?

You should seek help to overcome alcohol addiction if:

• You can’t control your need to drink.
• You are preoccupied with alcohol (you’re either drinking or thinking about drinking).
• Other people have warned you that your drinking is out of control.
• Your drinking is causing health problems.
• Your grades at school or your work performance has dropped because of your drinking.
• You’ve got into trouble because of your drinking.

Frequently asked questions

How long does it take for alcohol to get out of your liver?

It can take your liver one week or longer to completely detox from alcohol after your last drink. The human liver can process 1 ounce of alcohol every hour.

What is the third stage of alcohol withdrawal typically characterized by?

The third stage of alcohol withdrawal is typically characterized by fever, confusion, agitation, hallucinations, and seizures. However, every person is different and the severity of the withdrawal symptoms can vary from person to person depending on the extent of alcohol use and the person’s underlying health status.

Does everyone experience the 4 stages of alcohol withdrawal syndrome?

No, everyone may not experience the four stages of alcohol withdrawal syndrome. The severity of alcohol withdrawal depends on the several factors, including the duration and extent of alcohol consumption. People who are heavy drinkers or have been drinking for years are more likely to experience all four stages of alcohol withdrawal syndrome and more severe withdrawal symptoms.

Does private health cover inpatient treatment for addiction and rehab?

Many private health insurance plans cover all or some of the cost of inpatient treatment for addiction and rehab. The Affordable Care Act requires private and public insurance plans to cover 10 essential health benefits, one of which is substance use disorders. However, the exact coverage will depend on your specific insurance plan. You may be responsible for part of the costs of your alcohol addiction treatment, depending on your deductible, copay, and coinsurance.

What can be expected during the acute phase of alcohol detoxification?

You can expect to experience alcohol withdrawal symptoms during the acute phase of alcohol detoxification. These symptoms can range from mild symptoms such as headache and anxiety to more serious alcohol withdrawal symptoms such as tremors, hallucinations, and seizures.

How long does the acute phase of alcohol detox typically last?

The acute phase of alcohol detox can last anywhere from 6 hours to 2 weeks.

How can I support a family member going through alcohol detox?

You can support a loved one going through alcohol detox by educating yourself about alcohol withdrawal symptoms, accompanying them to family therapy appointments, supporting their recovery by removing alcohol from the home, and remaining patient and positive throughout the process.

Wrapping up

Being fearful about the stages of detoxing from alcohol is one of the key reasons why people don’t seek the help they need. Understanding the importance of medically supervised alcohol treatment and knowing the stages of alcohol detox can help people take this important first step towards a sober future. If you are worried about yourself or a loved one, Discover Recovery Treatment Center in Washington offers individualized alcohol detox programs. We provide evidence-based medical care and emotional support through all the stages of detox from alcohol. The foundation of our luxury rehabilitation center is a holistic approach where we treat the person as a whole and not just their alcohol addiction. Our inpatient residential program, which begins when you have gone through all the stages of alcohol detox, includes counseling and therapy, nutrition, and other evidence-based practices to heal your mind, body, and soul. Call us today to find out how we can help you overcome your alcohol addiction and hold your hand every step of the way as you detox from alcohol.

Watch the video below to learn more about the dangers of alcohol detox from our medical director.