Alcohol Withdrawal Timeline: Stages, Symptoms and Risks
The alcohol withdrawal timeline starts 6 to 24 hours after the last drink, reaches its peak between 24 and 72 hours, and carries a risk of withdrawal seizures and delirium tremens that makes medical care necessary for people with alcohol use disorder.
The exact course depends on how much and how long a person drank, past withdrawal episodes and physical health.
Key takeaways:
- Alcohol withdrawal seizures occur 6 to 48 hours after the last drink, according to StatPearls.
- Delirium tremens starts 48 to 96 hours after the last drink and can start as late as 7 to 10 days, according to MedlinePlus.
- Each untreated withdrawal episode raises the severity of the next one, a pattern researchers call kindling.
- Uncomplicated alcohol withdrawal eases within about a week, while protracted symptoms such as poor sleep and anxiety can last for months.
What Is Alcohol Withdrawal Syndrome?
Alcohol withdrawal syndrome is the set of physical and psychological symptoms that appears when a person with alcohol use disorder (AUD) stops or sharply cuts down heavy, long-term drinking. The brain of a heavy drinker adjusts to constant alcohol, and stopping removes the depressant effect the brain had balanced against.
Clinicians diagnose alcohol withdrawal when these symptoms follow a reduction in heavy, prolonged drinking and no other medical condition explains them, under the DSM-5-TR criteria. Alcohol withdrawal is also one of the 11 DSM-5-TR criteria for alcohol use disorder, so withdrawal symptoms on their own point to a diagnosis worth assessing.
What Happens in the Brain During Alcohol Withdrawal?
Long-term drinking increases the brain’s sensitivity to the calming neurotransmitter GABA and boosts the excitatory neurotransmitter glutamate, so stopping alcohol leaves the brain overexcited. That overexcitement produces the shaking, anxiety, racing heart and, in severe withdrawal, seizures.
Repeated withdrawal episodes make the overexcitement worse. Researcher Howard Becker described this kindling effect in 1998: each untreated detox sensitizes the brain, so a person with multiple past withdrawals faces a higher risk of seizures than someone stopping for the first time.
Who Is at Risk of Severe Alcohol Withdrawal?
The strongest predictors of severe alcohol withdrawal are past withdrawal seizures or delirium tremens, multiple earlier detox episodes and long-term daily heavy drinking. Clinicians use the Prediction of Alcohol Withdrawal Severity Scale (PAWSS) to flag patients at high risk before symptoms begin.
Risk factors for severe alcohol withdrawal include:
- A history of alcohol withdrawal seizures or delirium tremens
- Multiple previous detox or withdrawal episodes
- Older age and serious medical illness, including liver disease
- Withdrawal signs such as a fast pulse while blood alcohol is still present
- Use of benzodiazepines, opioids or other sedatives alongside alcohol
What Is the Alcohol Withdrawal Timeline?
The alcohol withdrawal timeline runs from early symptoms at 6 to 24 hours, through a seizure risk window of 6 to 48 hours and hallucinations at 12 to 48 hours, to delirium tremens at 48 to 96 hours, with acute symptoms easing within about a week. The table below summarizes each stage of the alcohol withdrawal timeline.
| Time since the last drink | What happens in alcohol withdrawal |
|---|---|
| 6 to 24 hours | Early withdrawal: tremor, anxiety, sweating, nausea, headache and poor sleep |
| 12 to 48 hours | Withdrawal hallucinosis: seeing or hearing things while still alert |
| 6 to 48 hours | Highest risk window for alcohol withdrawal seizures |
| 24 to 72 hours | Symptoms reach their peak |
| 48 to 96 hours | Delirium tremens can begin, and can start as late as 7 to 10 days |
| 5 to 7 days | Acute symptoms ease in uncomplicated withdrawal |
| Weeks to months | Protracted withdrawal: poor sleep, anxiety, low mood and cravings |
Sources: StatPearls (Canver and Gomez, 2024) and MedlinePlus.
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Hours 6 to 24: Early Alcohol Withdrawal
Early alcohol withdrawal begins 6 to 24 hours after the last drink with tremor, anxiety, sweating, nausea and insomnia, as the brain loses the depressant effect of alcohol. Some people feel these early symptoms while their blood alcohol is still above zero.
Early alcohol withdrawal symptoms include:
- Shaky hands and a tremor
- Anxiety, irritability and restlessness
- Sweating, a fast pulse and raised blood pressure
- Nausea, vomiting and loss of appetite
- Alcohol withdrawal headaches and trouble sleeping
Hours 12 to 48: Hallucinations and Peak Seizure Risk
Between 12 and 48 hours after the last drink, alcohol withdrawal brings withdrawal hallucinosis and the end of the 6 to 48 hour window when withdrawal seizures occur. StatPearls places alcohol withdrawal seizures 6 to 48 hours after the last drink, and more than 90% of them occur within the first 48 hours.
Withdrawal hallucinosis, which the DSM-5-TR calls alcohol withdrawal with perceptual disturbances, means seeing, hearing or feeling things that are not there while the person stays alert and oriented, which separates it from delirium tremens. A withdrawal seizure is a medical emergency, and one seizure raises the chance of delirium tremens later in the same withdrawal.
Hours 48 to 96: Delirium Tremens Risk
Delirium tremens (DTs) is the most severe stage of the alcohol withdrawal timeline, starting 48 to 96 hours after the last drink and as late as 7 to 10 days in some cases. StatPearls reports that 3% to 5% of people in alcohol withdrawal progress to delirium tremens, a medical emergency that is fatal without treatment.
Delirium tremens symptoms include:
- Severe confusion and disorientation about time and place
- Agitation and vivid hallucinations
- Fever, heavy sweating and a racing heart
- High blood pressure and rapid breathing
Delirium tremens lasts up to two weeks, according to a 2017 review by Jesse and colleagues in Acta Neurologica Scandinavica.
How Long Does Alcohol Withdrawal Last?
Uncomplicated alcohol withdrawal lasts 5 to 7 days, delirium tremens lasts up to two weeks, and protracted withdrawal symptoms can continue for months. The heavier and longer the drinking, the longer each stage of alcohol withdrawal lasts.
The Substance Abuse and Mental Health Services Administration (SAMHSA) describes protracted withdrawal as symptoms that outlast acute withdrawal by months.
Protracted alcohol withdrawal symptoms include:
- Trouble sleeping
- Anxiety and irritability
- Low mood
- Cravings for alcohol
SAMHSA notes that protracted withdrawal symptoms raise the risk of relapse in the first months of sobriety.
What Factors Change the Alcohol Withdrawal Timeline?
The amount and length of drinking, past withdrawal episodes, age, liver health and the use of other sedatives change how early alcohol withdrawal starts and how long it lasts. Two people who stop drinking on the same day follow different alcohol withdrawal timelines for these reasons.
Factors that change the alcohol withdrawal timeline:
- Daily amount of alcohol and years of heavy drinking
- Number of earlier withdrawal episodes, through kindling
- Liver disease, which slows the clearance of medications used in detox
- Co-occurring benzodiazepine or opioid use
- Age and overall physical health
What Are the Stages of Alcohol Withdrawal?
Clinicians grade the stages of alcohol withdrawal as mild, moderate or severe using the Clinical Institute Withdrawal Assessment for Alcohol, revised (CIWA-Ar), a 10-item scale developed by Sullivan and colleagues in 1989. Nurses repeat the CIWA-Ar score during detox to decide when to give medication.
- Mild alcohol withdrawal: CIWA-Ar scores under 8 to 10, with tremor, anxiety and sweating.
- Moderate alcohol withdrawal: CIWA-Ar scores of 8 to 15, with stronger tremor, nausea and a fast pulse.
- Severe alcohol withdrawal: CIWA-Ar scores above 15, with high seizure and delirium tremens risk.
Score ranges follow StatPearls. A CIWA-Ar score needs a patient who can answer questions, so clinicians use other tools once delirium sets in.
What Are the Symptoms of Alcohol Withdrawal?
Alcohol withdrawal symptoms range from tremor, anxiety and sweating in mild withdrawal to seizures, hallucinations and delirium tremens in severe withdrawal. Most symptoms come from the overexcited nervous system described above.
Common alcohol withdrawal symptoms:
- Tremor, sweating and a fast heart rate
- Anxiety, irritability and low mood
- Nausea, vomiting and loss of appetite
- Insomnia and nightmares
Severe alcohol withdrawal symptoms:
- Withdrawal seizures
- Hallucinations
- Delirium tremens with confusion and fever
- Dangerously high blood pressure and heart rate
How Is Alcohol Withdrawal Treated?
Doctors treat alcohol withdrawal with benzodiazepines such as chlordiazepoxide, diazepam and lorazepam, thiamine, fluids and close monitoring, following the 2020 American Society of Addiction Medicine (ASAM) guideline. Benzodiazepines calm the overexcited brain and prevent withdrawal seizures.
- First-line medication: benzodiazepines, with lorazepam preferred for people with liver disease.
- Alternatives and add-ons: phenobarbital for severe withdrawal, and carbamazepine or gabapentin for mild withdrawal, per the ASAM guideline.
- Nutrition: thiamine (vitamin B1) prevents Wernicke encephalopathy, a brain disorder caused by thiamine deficiency in heavy drinkers.
- After detox: naltrexone, acamprosate and disulfiram are FDA-approved for alcohol use disorder, and extended-release naltrexone is a monthly injection given as part of medication-assisted treatment.
- Emerging options: gabapentin and topiramate are used off-label for alcohol use disorder.
Behavioral therapies such as cognitive behavioral therapy (CBT) and motivational interviewing start once withdrawal is under control, because detox treats withdrawal and not the alcohol use disorder itself.
Is It Alcohol Withdrawal or a Hangover?
A hangover follows a single episode of heavy drinking and fades within a day, while alcohol withdrawal happens only in a dependent body, starts 6 to 24 hours after the last drink and worsens over the following days. Drinking temporarily relieves withdrawal symptoms, which is why morning drinking is a warning sign of dependence.
- Hangover: headache, thirst and tiredness that peak as blood alcohol returns to zero, per the National Institute on Alcohol Abuse and Alcoholism (NIAAA).
- Alcohol withdrawal: tremor, sweating, a fast pulse and anxiety that build over 24 to 72 hours in a person with alcohol use disorder.
- Warning sign of withdrawal: needing a drink in the morning to stop the shakes.
How Does Riverside Recovery of Tampa Treat Alcohol Withdrawal?
Riverside Recovery of Tampa provides medically supervised alcohol detox in Tampa, Florida, with registered nurses on every shift and no blood alcohol cutoff at admission. A person who is still intoxicated can be admitted if they can complete intake and walk to their room.
- Medically complex care: Riverside treats people with liver disease, including liver transplant referrals, and GI and hepatitis complications.
- Staffing: nursing averages 1 nurse to 8 clients, with nursing leadership on call 24 hours a day.
- Same team after detox: clients keep the same therapists when they move from detox into inpatient alcohol rehab on the same campus.
Frequently Asked Questions About the Alcohol Withdrawal Timeline
What happens on day 4 of not drinking alcohol?
Day 4 of not drinking falls inside the 48 to 96 hour window when delirium tremens can begin. In mild withdrawal, day 4 brings easing tremor and better sleep. For heavy, long-term drinkers, day 4 still needs medical monitoring because delirium tremens can start then.
What is the hardest day when you quit drinking?
Days 2 and 3 are the hardest days, because alcohol withdrawal symptoms peak between 24 and 72 hours after the last drink. The seizure risk window, 6 to 48 hours, overlaps with the start of that peak.
What is a safe alcohol taper schedule?
No home taper schedule is proven safe for a person with alcohol use disorder, because withdrawal seizures can occur without warning. A safe taper is a medical one: clinicians give a scheduled or symptom-triggered benzodiazepine taper guided by CIWA-Ar scores.
What is the fastest way to detox from alcohol?
No method shortens alcohol withdrawal itself. The liver clears alcohol at a fixed rate, and the nervous system needs days to rebalance. Medically supervised detox does not make withdrawal faster, but it makes withdrawal safer and more comfortable.
When does delirium tremens start?
Delirium tremens starts 48 to 96 hours after the last drink and can start as late as 7 to 10 days. A history of delirium tremens or withdrawal seizures raises the risk.
Can alcohol withdrawal kill you?
Yes. Alcohol withdrawal seizures and delirium tremens are life-threatening, and delirium tremens is fatal without treatment, according to MedlinePlus. Medical treatment with benzodiazepines lowers that risk.
Is it safe to stop drinking cold turkey?
Stopping cold turkey is not safe for a person with alcohol use disorder who drinks heavily every day, because sudden withdrawal brings a risk of seizures and delirium tremens. Medically supervised detox manages the first days of withdrawal safely.
- Canver BR, Gomez AE. Alcohol Withdrawal Syndrome. StatPearls. Treasure Island (FL): StatPearls Publishing; updated 2024. National Library of Medicine
- MedlinePlus. Alcohol withdrawal. National Library of Medicine. medlineplus.gov
- MedlinePlus. Delirium tremens. National Library of Medicine. medlineplus.gov
- Jesse S, Bråthen G, Ferrara M, et al. Alcohol withdrawal syndrome: mechanisms, manifestations, and management. Acta Neurologica Scandinavica. 2017;135(1):4-16.
- Sullivan JT, Sykora K, Schneiderman J, Naranjo CA, Sellers EM. Assessment of alcohol withdrawal: the revised Clinical Institute Withdrawal Assessment for Alcohol scale (CIWA-Ar). British Journal of Addiction. 1989;84(11):1353-1357.
- Becker HC. Kindling in alcohol withdrawal. Alcohol Health and Research World. 1998;22(1):25-33.
- American Society of Addiction Medicine. The ASAM Clinical Practice Guideline on Alcohol Withdrawal Management. Journal of Addiction Medicine. 2020;14(3S Suppl 1):1-72.
- Substance Abuse and Mental Health Services Administration. Protracted Withdrawal. Substance Abuse Treatment Advisory, Volume 9, Issue 1. 2010.
- American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR). 2022.
