Alcohol detox typically takes five to seven days for the acute physical symptoms to resolve, though the full timeline varies widely depending on how long and how heavily you’ve been drinking. Symptoms usually begin within 6 to 24 hours after your last drink, peak between 24 and 72 hours, and then gradually taper off. For some people, lingering effects like sleep problems and mood changes can persist for weeks or even months afterward.
The First 72 Hours: What to Expect
The withdrawal timeline follows a fairly predictable pattern, even though individual experiences differ in severity. Here’s how it generally unfolds:
6 to 12 hours: Mild symptoms appear first. Headache, anxiety, nausea, irritability, and trouble sleeping are common in this window. You may also notice your hands shaking. Tremors typically begin within 5 to 10 hours of your last drink.
12 to 24 hours: Symptoms intensify. Some people begin experiencing hallucinations in this window, which can include seeing, hearing, or feeling things that aren’t there. Unlike hallucinations caused by other conditions, you may remain aware that what you’re perceiving isn’t real. These can last up to two days once they start.
24 to 48 hours: This is often the hardest stretch. For most people with mild to moderate withdrawal, symptoms peak and begin to improve somewhere in this range. It’s also the period of highest seizure risk. Withdrawal seizures can occur anywhere from 6 to 48 hours after the last drink, but the danger peaks at about 24 hours. Multiple seizures over the span of several hours are not uncommon.
48 to 72 hours: Most people start feeling noticeably better. However, this is the window when delirium tremens, the most dangerous form of withdrawal, can first appear. Delirium tremens involves severe confusion, rapid heartbeat, fever, and heavy sweating. Its peak intensity hits around four to five days after the last drink, and in some cases it can be delayed by more than a week.
Days 4 Through 7
By the fourth or fifth day, the worst of the physical symptoms have passed for most people. Sleep is still often disrupted, and you may feel fatigued, emotionally flat, or anxious. Appetite usually starts returning, and the shaking and nausea that dominated the first few days begin to fade. For people going through a supervised medical detox program, this is typically when monitoring intensity decreases and the focus shifts from stabilization to planning next steps for recovery.
People with severe withdrawal or those who develop delirium tremens are the exception. Their acute symptoms can extend well beyond a week, and they need close medical monitoring throughout.
Why Your Timeline May Be Shorter or Longer
Several factors shape how long detox takes and how intense it feels. The most significant is your drinking history. Someone who has been drinking heavily for years will generally experience a more prolonged and severe withdrawal than someone with a shorter history of heavy use. Previous episodes of withdrawal also matter. Each time the body goes through withdrawal, the nervous system tends to react more aggressively the next time, a phenomenon sometimes called “kindling.”
Your overall physical health plays a role too. Liver function, nutritional status, age, and whether you have other medical or mental health conditions all influence how your body handles the stress of detox. Someone with significant liver damage, for instance, processes medications and toxins more slowly, which can complicate and extend the process.
Post-Acute Withdrawal: The Weeks and Months After
Even after the acute phase wraps up, many people experience a second, subtler wave of symptoms known as post-acute withdrawal syndrome, or PAWS. This isn’t the intense physical distress of the first week. Instead, it involves ongoing mood swings, sleep problems, fatigue, difficulty concentrating, and cravings that come and go unpredictably.
PAWS symptoms can last anywhere from a few months to two years. They typically peak during the first few months after quitting and then gradually fade. This phase catches a lot of people off guard because they expect to feel fully recovered once the physical detox is over. Understanding that these lingering symptoms are a normal part of the brain recalibrating after prolonged alcohol exposure can make them easier to manage and less likely to trigger a relapse.
Medical Detox vs. Stopping on Your Own
Alcohol is one of the few substances where withdrawal itself can be life-threatening. Seizures and delirium tremens carry real risks of death if untreated. That makes the setting in which you detox a major factor in both safety and comfort. In a medical detox program, medications are used to calm the nervous system, reduce seizure risk, and ease symptoms like nausea and insomnia. This often shortens the period of intense discomfort and significantly lowers the chance of dangerous complications.
Without medical support, the body still follows the same general timeline, but the experience is harder and riskier. People who have been drinking heavily for extended periods, those with a history of withdrawal seizures, and anyone who has gone through withdrawal multiple times before are at the highest risk for severe complications. For these groups especially, stopping abruptly without supervision is genuinely dangerous.
The short answer: plan for about a week of acute detox, but be prepared for residual symptoms that taper over the following weeks and months. The intensity and duration depend heavily on your drinking history, physical health, and whether you have medical support during the process.