For most people, alcohol detox takes about 5 to 7 days for the acute physical symptoms to clear. The first symptoms appear as early as 6 hours after your last drink, peak between 24 and 72 hours, and gradually taper from there. That said, the full picture is more nuanced: some people experience only mild discomfort for a few days, while others face serious, even life-threatening complications that extend the process. And a subtler phase of psychological symptoms can linger for weeks or months afterward.
The First 72 Hours, Stage by Stage
Alcohol withdrawal follows a fairly predictable pattern, and understanding what happens in each window can help you know what to expect.
6 to 12 hours: Mild symptoms show up first. Headache, anxiety, insomnia, nausea, and a general feeling of unease are common. Your hands may tremble slightly. Many people describe this stage as feeling like a bad hangover that keeps getting worse instead of better.
12 to 24 hours: Symptoms intensify. Some people experience hallucinations during this window, seeing, hearing, or feeling things that aren’t there. This can be frightening, but hallucinations alone don’t necessarily signal the most dangerous form of withdrawal. Sweating, elevated heart rate, and irritability typically increase.
24 to 48 hours: This is when symptoms usually peak for people with mild to moderate withdrawal. It’s also the window of highest seizure risk. Withdrawal seizures are more common in people who have been through detox multiple times before, a pattern sometimes called “kindling,” where each withdrawal episode becomes more intense than the last.
48 to 72 hours: For most people, this is when things start to turn a corner. Symptoms are still present but gradually easing. However, this is also the danger zone for the most severe complication: delirium tremens.
When Withdrawal Becomes Dangerous
Delirium tremens (DTs) typically appears between one and three days after the last drink. It involves severe confusion, rapid heartbeat, high blood pressure, fever, and heavy sweating. Without treatment, about 15% of people who develop DTs do not survive. With proper medical care, that number drops dramatically, but DTs remain a medical emergency.
Not everyone is at equal risk. The factors that increase your chances of severe withdrawal include daily heavy drinking over a long period, a history of previous withdrawal seizures or DTs, older age, abnormal liver function, and having another acute illness at the same time. The general rule is that withdrawal severity tracks with how much you’ve been drinking and for how long.
What Happens After the First Week
By days 5 through 7, the acute physical symptoms (tremors, nausea, sweating, elevated heart rate) have typically resolved. But many people are surprised to find they still don’t feel “normal.” Sleep disturbances, low energy, and difficulty concentrating are common in the second week and beyond.
A condition called post-acute withdrawal syndrome (PAWS) can extend psychological and mood-related symptoms for months, and in some cases, over a year. PAWS symptoms include anxiety, irritability, trouble with memory and focus, mood swings, and disturbed sleep. These symptoms tend to fluctuate, coming and going in waves rather than following a steady path. This is one reason early sobriety can feel so unpredictable. Knowing that PAWS is a recognized, time-limited condition can help you avoid interpreting a bad week as a sign that something is permanently wrong.
How Medical Detox Changes the Timeline
In a supervised medical detox, healthcare providers use medications that calm the same brain receptors alcohol was affecting. This doesn’t necessarily shorten the overall timeline, but it dramatically smooths out the experience, reducing the intensity of symptoms and preventing seizures and DTs.
Providers monitor withdrawal using a standardized scoring system that rates symptoms like nausea, tremor, anxiety, and sweating on a numeric scale. Scores below 8 to 10 indicate mild withdrawal that often doesn’t require medication. Scores of 8 to 15 suggest moderate withdrawal with notable physical signs. Scores above 15 signal severe withdrawal and the risk of delirium tremens. Medication doses are adjusted based on these scores, so the treatment responds to what your body is actually doing rather than following a fixed schedule.
Nutritional support is another piece of medical detox that matters more than people realize. Heavy, long-term drinking depletes vitamin B1 (thiamine), and severe deficiency can cause lasting brain damage. Treatment typically involves supplemental thiamine for 3 to 7 days initially, sometimes longer if neurological symptoms are present. In some cases, recovery of B1 levels takes up to 30 days of treatment. Electrolyte imbalances are also corrected during this period.
Mild vs. Severe: Two Very Different Experiences
Someone who has been drinking heavily for a few months may go through a few uncomfortable days of anxiety, poor sleep, and irritability before feeling largely back to normal within a week. They might manage this safely on an outpatient basis with medical guidance.
Someone who has been drinking a large volume daily for years, especially if they’ve attempted detox before, faces a different situation entirely. Their withdrawal is more likely to involve seizures, hallucinations, or DTs. Medical supervision isn’t just helpful for this group; it’s potentially lifesaving. Inpatient detox programs for severe cases typically last 5 to 10 days, though stabilization of sleep, mood, and cognition takes longer.
A Realistic Full Timeline
- Hours 6 to 24: Symptoms begin and escalate. Anxiety, tremor, nausea, insomnia.
- Hours 24 to 72: Peak severity. Highest risk for seizures (24 to 48 hours) and DTs (48 to 72 hours).
- Days 4 to 7: Acute physical symptoms gradually resolve.
- Weeks 2 to 4: Sleep, energy, and concentration slowly improve. Some residual anxiety and irritability.
- Months 1 to 12+: PAWS symptoms may come and go. Each wave is typically shorter and less intense than the one before it.
The acute danger is concentrated in that first 72-hour window. But the full process of your brain and body recalibrating after sustained heavy drinking extends well beyond the first week. Knowing that timeline upfront helps set realistic expectations for what recovery actually feels like, day by day and month by month.