For most people, the physical symptoms of alcohol withdrawal last about five days. The timeline starts within hours of your last drink and follows a fairly predictable pattern, though the severity varies widely depending on how much and how long you’ve been drinking. Mild cases may feel like a bad flu that clears in two to three days, while severe withdrawal can be life-threatening and require close medical monitoring for a week or more.
The First 12 Hours
Withdrawal symptoms typically begin within 6 to 24 hours after your last drink, though for heavy, long-term drinkers, they can start even sooner. The earliest signs are mild: headache, anxiety, trouble sleeping, and a general sense of unease. Tremors, or “the shakes,” often appear within 5 to 10 hours. You may also notice sweating, nausea, or a racing heart. At this stage, symptoms are uncomfortable but usually not dangerous.
Hours 12 to 48: When Symptoms Peak
This is the most intense window. For people with mild to moderate withdrawal, symptoms peak somewhere between 24 and 72 hours after the last drink, then begin to ease. Tremors hit their worst point around 24 to 48 hours. Nausea, vomiting, heavy sweating, and agitation are all common during this stretch.
Hallucinations can begin within 12 to 24 hours and may last up to two days. These can be visual, auditory, or tactile, like feeling insects on your skin. They’re unsettling, but in many cases the person experiencing them still knows where they are and what’s happening. This is different from the confusion that comes with the most severe form of withdrawal.
Seizures are the other major concern during this window. The risk is highest between 24 and 48 hours after the last drink, and it’s common for several seizures to cluster over a few hours. This is one of the main reasons medical supervision matters: seizures can happen even in people who don’t expect a severe withdrawal.
Days 2 to 5: Resolution or Escalation
For most people, things start improving after the 48- to 72-hour mark. Physical symptoms gradually fade, and by day five, the acute phase is over. Medical guidelines reflect this: outpatient withdrawal programs typically have patients check in daily for up to five days, and patients with mild withdrawal who show no worsening after 36 hours are unlikely to develop more severe symptoms.
For a smaller group, though, days two through five bring the most dangerous complication: delirium tremens, often called DTs. This condition commonly starts two to three days after the last drink but can be delayed by more than a week. It involves severe confusion, disorientation, high fever, rapid heartbeat, and drenching sweats. Its peak intensity is usually four to five days after the last drink. DTs are a medical emergency and can be fatal without treatment. They affect a minority of people going through withdrawal, but the risk is real for anyone with a history of heavy, prolonged drinking or previous complicated withdrawals.
What Determines How Severe It Gets
Not everyone who stops drinking goes through the same experience. Several factors push the timeline and intensity in one direction or another:
- How much and how long you drank. Years of daily heavy drinking produce more physical dependence than a few months of binge drinking. The brain has had more time to adapt to alcohol’s constant presence, so removing it creates a bigger rebound.
- Previous withdrawals. Each time you go through withdrawal, the next episode tends to be worse. This is sometimes called “kindling,” and it’s one reason repeated cycles of quitting and relapsing carry increasing risk.
- Overall health. Liver function, age, nutrition, and whether you have other medical conditions all play a role. A malnourished 55-year-old with liver damage faces a very different withdrawal than an otherwise healthy 30-year-old.
- Use of other substances. If you also take sedatives like benzodiazepines, the combined withdrawal effects can be more unpredictable and severe.
In medical settings, providers use a standardized scoring tool to track severity in real time. It measures ten symptoms, including nausea, tremor, sweating, anxiety, agitation, and hallucinations, each scored on a scale. A total score below 10 suggests mild withdrawal that may not need medication. Scores above 15 signal severe withdrawal with a significantly higher risk of dangerous complications. This scoring happens every one to four hours during the first 24 hours, then less frequently once symptoms stabilize.
Symptoms That Linger for Weeks or Months
Even after the acute physical symptoms resolve, many people experience a second, slower phase of recovery. This is sometimes called post-acute withdrawal syndrome, or PAWS. The symptoms are primarily psychological and mood-related: anxiety, irritability, difficulty concentrating, sleep problems, and low energy. They tend to come in waves rather than being constant, which can be confusing when you thought the hard part was behind you.
PAWS can last for months, and in some cases, symptoms fluctuate for a year or longer before fully resolving. This phase is a major driver of relapse because it creates ongoing discomfort that can feel like it will never end. Understanding that these lingering symptoms are a normal, expected part of the brain recalibrating itself can make them easier to ride out. They do improve over time, even when progress feels slow.
What Medical Detox Looks Like
Medically supervised withdrawal doesn’t eliminate symptoms, but it shortens the danger window and reduces the worst of the discomfort. The standard approach uses sedative medications to calm the overexcited nervous system, given on a schedule or as needed based on symptom scores. This helps prevent seizures, reduces the chance of delirium tremens, and makes the physical experience more manageable.
For mild cases managed on an outpatient basis, you’d typically visit a provider daily for up to five days. Some programs alternate in-person visits with phone or video check-ins. For moderate to severe withdrawal, inpatient care allows for closer monitoring, with reassessments every one to four hours during the first day and less frequently once you’ve been stable for 24 hours. After a withdrawal seizure, expect very close monitoring for at least 6 to 24 hours.
The total supervised period is usually five to seven days for uncomplicated cases. People with delirium tremens or other complications may need longer care, sometimes extending past a week. After the medical detox phase, the transition to ongoing support for staying sober is where the longer work begins.