How Long Does Alcohol Withdrawal Last? The Hour-by-Hour Timeline, the 72-Hour Peak, and What Lasts Longer

Alcohol withdrawal runs on a schedule that is more predictable than most people expect, and the schedule is the reason it is dangerous: the worst of it arrives on day two and three, after a person has already decided they are through the hard part. This page sets out the timeline hour by hour from the clinical references that define it, says when seizures and delirium tremens appear and how often, explains what makes withdrawal run longer or worse, and describes what lasts after the first week. Everything is sourced, and nothing here is a prediction for any one person.

Minor symptoms begin at 6 to 12 hours, hallucinations can appear at 12 to 24 hours, seizures are most likely at 24 to 48 hours, and delirium tremens begins at 48 to 72 hours.

That four-stage table comes from the American Academy of Family Physicians’ review of alcohol withdrawal syndrome, and it is the timeline clinicians are taught. The stages, in order:

StatPearls draws the same windows slightly wider, which matters for anyone counting hours at home: seizures typically occur between 8 and 48 hours after the last drink and can occur without any other sign of withdrawal, and withdrawal delirium can begin at any point up to three to five days after stopping or cutting down. The stages table above this page is built from these two sources.

Source: Alcohol Withdrawal Syndrome, Bayard et al., American Family Physician, 2004.

Withdrawal seizures occur between 8 and 48 hours after the last drink, and delirium tremens most often begins at 48 to 72 hours and can start as late as day five. About 3 to 5 percent of people in alcohol withdrawal develop it.

The American Academy of Family Physicians notes that up to one-third of people who have a withdrawal seizure go on to delirium tremens, which is why a seizure is treated as the start of a monitored stay rather than an event that has passed. StatPearls gives the delirium’s frequency as roughly 3 to 5 percent of people with withdrawal syndrome, describes it as potentially fatal, and records that its mortality was historically as high as 20 percent and is now around 1 percent with prompt diagnosis and treatment. The StatPearls chapter on delirium tremens adds that it can last up to five days once it begins.

Untreated, the numbers are very different: that chapter puts anticipated mortality without appropriate treatment at up to 37 percent.

Both complications are what medical detox exists to prevent. Benzodiazepines, given on a schedule or in response to a withdrawal score, reduce the risk of progression, and they have to be started before the peak, not after a seizure. The alcohol withdrawal seizures and DTs timeline page goes through who is most at risk.

Source: Delirium Tremens, StatPearls, National Library of Medicine; Outpatient Management of Alcohol Withdrawal Syndrome, Muncie et al., American Family Physician, 2013.

After the first week, the physical withdrawal is over for most people, but the National Library of Medicine notes that sleep changes, rapid mood swings and fatigue may last for months.

That stretch has a name, post-acute withdrawal, and it is the part of alcohol recovery that no timeline table shows. Insomnia, low mood, anxiety, irritability and poor concentration come and go for weeks to months while the nervous system re-learns to run without alcohol. None of it is dangerous in the way the first 72 hours are, but it is the period in which most people who relapse do so, which is why the step after detox is arranged before detox ends. The post-acute withdrawal page covers what to expect, and the 30 days sober and 3 months without alcohol pages describe those months as people actually experience them.

Alcohol detox at Briarwood is usually five to seven days, which covers the 72-hour peak with margin on both sides. That means nursing around the clock, a benzodiazepine dosed against a withdrawal score, thiamine and fluids from admission, and a physician who has seen day three many times.

The stay follows the timeline on this page. Admission is a medical assessment, including the history of previous withdrawals that decides how aggressively to medicate. The first three days are observation through the peak, with vital signs and a withdrawal score checked repeatedly and medication adjusted to keep the nervous system from overshooting. Days four to seven are the taper, sleep returning, appetite returning, and the planning of what comes next. The alcohol detox page describes the program, and how long alcohol detox takes explains why some people stay longer than planned, most often because a second substance or a medical condition extends the taper.

Because the months after detox are where relapse happens, the last days of the stay are spent arranging residential treatment, an intensive outpatient program, or sober living, and starting a medication such as naltrexone or acamprosate where it fits. Cost and insurance covers what a stay costs with and without coverage. Admissions is answered at every hour, and a nurse can tell you on the first call whether the withdrawal you are describing belongs at home or in a bed.