Alcohol Withdrawal Symptoms: A Day-by-Day Timeline

Why Alcohol Withdrawal Happens

Your brain adapts to alcohol. When you drink heavily over weeks, months, or years, your central nervous system compensates by staying in a heightened state of alertness. Remove the alcohol, and your brain is left overexcited with nothing to calm it down. That is withdrawal.

Alcohol withdrawal is one of the few substance withdrawals that can be fatal. This is not exaggeration. Severe alcohol withdrawal carries a mortality rate of up to 37% if untreated. This is why medical supervision matters.

Hours 6 to 12: Early Symptoms Begin

Withdrawal can start as soon as 6 hours after your last drink. Early symptoms are often mistaken for a hangover:

• Anxiety and restlessness
• Tremors in the hands (the “shakes”)
• Nausea and vomiting
• Sweating
• Insomnia
• Headache
• Elevated heart rate

These symptoms are your nervous system reacting to the absence of a depressant. They will intensify over the next 24 to 48 hours.

Hours 12 to 24: Symptoms Escalate

By the 12-hour mark, symptoms become harder to manage on your own:

• Increased blood pressure and heart rate. Your cardiovascular system is under stress.
• More severe tremors. Shaking may affect your entire body.
• Irritability and agitation. You may feel an overwhelming urge to drink to stop the discomfort.
• Gastrointestinal distress. Vomiting and diarrhea lead to dehydration.

Some people experience alcoholic hallucinosis during this window. Visual, auditory, or tactile hallucinations can occur while you remain conscious and aware. This is distinct from delirium tremens and typically resolves within 48 hours.

Hours 24 to 48: Peak Danger Window

This is the most dangerous period. Two serious complications can emerge:

Withdrawal seizures

Seizures occur in roughly 5% to 10% of people going through alcohol withdrawal. They typically happen 24 to 48 hours after the last drink. Grand mal seizures are the most common type. They can occur without warning and without any prior seizure history.

Delirium tremens (DTs)

DTs affect approximately 3% to 5% of people in alcohol withdrawal, but they are life-threatening. Symptoms include:

• Severe confusion and disorientation
• Rapid heartbeat and high blood pressure
• Fever (temperatures above 104°F in severe cases)
• Profuse sweating
• Vivid hallucinations
• Severe agitation

The New England Journal of Medicine reports that delirium tremens carries a mortality rate of 1% to 4% with treatment in an ICU setting, and up to 37% without medical intervention. Anyone with a history of heavy daily drinking should undergo medically supervised detox.

Days 3 to 5: Gradual Improvement

For most people, physical symptoms begin to decrease after 72 hours. If you have not developed DTs or seizures by day 3, the risk drops significantly. During this phase:

• Tremors ease but may persist at a low level
• Sleep improves slightly (still disrupted)
• Appetite starts to return
• Anxiety remains elevated but manageable
• Mood swings are common

Medical staff in a medical detox program typically begin tapering any medications used to manage withdrawal during this period.

Days 5 to 14: Post-Acute Symptoms

The acute physical withdrawal is largely over by day 5 to 7. But you are not back to normal. Post-acute withdrawal symptoms (PAWS) can persist for weeks or months:

• Sleep disturbances. Insomnia and fragmented sleep are common for 2 to 8 weeks.
• Anxiety and depression. Your brain chemistry is still recalibrating.
• Difficulty concentrating. Cognitive function improves gradually over weeks.
• Cravings. These come in waves and decrease in frequency over time.

When to Seek Emergency Medical Help

Go to an emergency room or call 911 immediately if you or someone you know experiences:

• Seizures
• Fever above 101°F
• Severe confusion or hallucinations
• Chest pain or difficulty breathing
• Uncontrollable vomiting (risk of dehydration)

Do not attempt to detox from heavy alcohol use at home without medical supervision. The safest path is through a supervised medical detox program where clinical staff monitor your vitals and administer medications to prevent complications.

If you are concerned about a loved one’s drinking, our guide on signs someone needs rehab can help you assess the situation.