Recovery & Sobriety
Alcohol Withdrawal Timeline:
What Happens Hour by Hour
Alcohol withdrawal follows a predictable clinical pattern. Knowing the timeline — when symptoms start, peak, and pass — is the most important thing you can do to stay safe and understand what you are going through.
Medical disclaimer: Alcohol withdrawal can be life-threatening. Do NOT stop abruptly without medical supervision if you are a heavy daily drinker. For immediate help: SAMHSA 1-800-662-4357 or call 911.
6–8h
When alcohol withdrawal symptoms typically begin after the last drink
72h
When the acute withdrawal peak typically occurs for most people
3–5%
of people with alcohol dependence develop Delirium Tremens — which is fatal without treatment (NIAAA)
Alcohol withdrawal is one of the most medically dangerous substance withdrawals. Unlike opioid withdrawal — which is agonising but rarely fatal — alcohol withdrawal can kill. Understanding the timeline is not just useful: for heavy daily drinkers, it can be lifesaving.
When do alcohol withdrawal symptoms start?
Alcohol withdrawal symptoms typically begin 6–8 hours after the last drink — or when blood alcohol level drops significantly, even if some alcohol remains in the system. The timing depends on drinking history, but the 6–8 hour window is the most consistent clinical marker.
Who experiences withdrawal: Not everyone who stops drinking experiences significant withdrawal. Mild symptoms are common in regular drinkers. Severe, life-threatening withdrawal — including Delirium Tremens — is more common in people who have drunk heavily every day for years.
Hours 6–24: Early symptoms
Hours 6–12 · Physical
The nervous system begins to rebound
Alcohol suppresses the central nervous system. When you stop, the CNS snaps into overdrive. First symptoms: mild anxiety, headache, shaking hands, sweating, nausea, elevated heart rate. These feel like a severe hangover — but they will intensify before they get better.
What to do: Hydrate. Eat if possible. Stay in a calm environment. Tell someone. Do not drink to relieve symptoms — this only delays and potentially worsens withdrawal.
Hours 12–24 · Mental
Anxiety intensifies, sleep becomes very difficult
By hours 12–24, anxiety typically intensifies significantly. Sleep is very difficult. Some people experience mild visual disturbances (alcohol hallucinosis) — distinct from Delirium Tremens, and typically resolves on its own without specific treatment.
24–48h
The window of highest seizure risk. Seizures can occur without warning and do not always follow other severe symptoms.
Source: NIAAA Clinical Guidelines
Hours 24–48: Peak withdrawal
Hours 24–48 · Critical
Seizure risk peaks — most dangerous period
The 24–48 hour window is the most clinically dangerous period. Seizures are most likely here. They can occur in people who have shown no other severe symptoms and with no warning. For heavy daily drinkers, this period should ideally be managed under medical supervision. Benzodiazepines (diazepam, lorazepam) are the first-line medical treatment.
If someone has a seizure: Do not restrain them. Protect their head. Call 911 immediately. Do not put anything in their mouth.
Days 2–3: The most difficult period
Days 2 and 3 are when people feel worst. Symptoms peak during this window. Your brain's GABA and glutamate systems — the main inhibitory and excitatory neurotransmitter systems — are trying to rebalance after chronic chemical suppression.
Days 2–3 · Emergency risk
Delirium Tremens (DTs) typically begins in this window
DTs occur in approximately 3–5% of withdrawal cases but carry a mortality rate of 15–37% without treatment. With prompt medical treatment, that rate falls below 5%. Symptoms: severe confusion, agitation, fever, hallucinations (visual and tactile), rapid heart rate, high blood pressure, and seizures.
Call 911 immediately if you see severe confusion, high fever, hallucinations, or seizures. DTs require IV benzodiazepines and continuous medical monitoring. They cannot be managed at home.
Days 4–7: Turning the corner
For most people who do not develop DTs, day 4 is when acute withdrawal begins to meaningfully ease.
What typically improves from day 4 onward
Tremors subside — hand shaking typically reduces significantly by day 4–5.
Appetite returns — eating regularly helps stabilise blood sugar and supports recovery.
Sleep begins to return — still disrupted, but no longer completely absent. Vivid dreams are common.
Cognitive function improves — the severe brain fog begins to lift, though full cognitive recovery takes weeks to months.
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Weeks 2–4: Post-acute withdrawal syndrome (PAWS)
For many people, a second wave of symptoms appears after acute withdrawal resolves — typically starting around week 2 and lasting weeks to months. This is Post-Acute Withdrawal Syndrome (PAWS).
Weeks 2–12+ · PAWS
The second withdrawal most people don't know about
PAWS symptoms are different from acute withdrawal — less physically dangerous but often more psychologically disruptive. Common symptoms: anxiety and mood swings, sleep difficulty, cognitive fog, low motivation, irritability, and waves of cravings. These can appear weeks or months into sobriety and are frequently mistaken for a mental health crisis.
What to know: PAWS is not failure. It is a normal part of the brain's long-term recalibration. Symptoms come in waves and reduce in frequency and intensity over time — most people see significant improvement by 3–6 months.
When is alcohol withdrawal dangerous?
High-risk factors for severe withdrawal
Long duration of heavy daily drinking — years of high-volume daily consumption creates the highest risk.
Previous withdrawal seizures — the single strongest predictor of severe withdrawal. Each withdrawal can be more severe than the last (kindling effect).
Previous Delirium Tremens — anyone who has experienced DTs before is at high risk of experiencing them again.
Co-occurring health conditions — liver disease, heart disease, and thiamine deficiency all increase complication risk.
How to manage withdrawal symptoms safely
Home management — mild cases only
Hydration, nutrition, and close monitoring
If your drinking history is moderate, you have no prior seizures or DTs, and your symptoms are mild — mild anxiety, mild sweating, mild tremor — home management with close monitoring is feasible. Drink electrolyte fluids, take B vitamins, eat regularly, rest. Have someone check on you every few hours.
Do not go through this alone even if symptoms are mild. Tell someone you trust and ensure they can call 911 if symptoms worsen suddenly.
When to seek immediate medical help
Call 911 immediately if you experience:
• Seizure of any kind • Severe confusion or disorientation • High fever (above 38.5°C / 101°F)
• Hallucinations (visual, auditory, tactile) • Heart rate above 120 bpm at rest
• Loss of consciousness • Severe vomiting preventing hydration
These are signs of Delirium Tremens or severe complications. They require emergency medical treatment.
• Seizure of any kind • Severe confusion or disorientation • High fever (above 38.5°C / 101°F)
• Hallucinations (visual, auditory, tactile) • Heart rate above 120 bpm at rest
• Loss of consciousness • Severe vomiting preventing hydration
These are signs of Delirium Tremens or severe complications. They require emergency medical treatment.
After you are through acute withdrawal, use SoberTrack to track every day of your recovery — from the moment you are safe to start counting forward.
More in the SoberTrack recovery library:
- Dry January 2026: Complete Guide + Free Tracker
- How to Stop Drinking: A Real Step-by-Step Guide
- Sobriety Milestones: Every One That Matters in Recovery
- What Happens When You Stop Drinking: Full Timeline
- How Much Money Do You Save When You Stop Drinking?
- 90 Days Sober: Benefits, Brain Changes & What to Expect
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Frequently asked questions
When do alcohol withdrawal symptoms start?
Symptoms typically begin 6–8 hours after the last drink, or when blood alcohol levels drop significantly. The timeline depends on how much and how long you have been drinking.
How long does alcohol withdrawal last?
Acute withdrawal typically peaks at 48–72 hours and substantially resolves by day 5–7. Post-Acute Withdrawal Syndrome (PAWS) can cause waves of symptoms for weeks to months after acute withdrawal resolves.
Is alcohol withdrawal dangerous?
Yes — alcohol withdrawal is one of the most medically dangerous substance withdrawals. Delirium Tremens occurs in 3–5% of cases but carries a mortality rate of 15–37% without treatment. Heavy daily drinkers should seriously consider medically supervised detox.
What is Delirium Tremens (DTs)?
DTs is the most severe form of alcohol withdrawal — severe confusion, fever, hallucinations, rapid heart rate, and seizures. It typically begins 48–96 hours after the last drink and is a medical emergency requiring immediate hospital treatment.
What is PAWS?
Post-Acute Withdrawal Syndrome is a second wave of withdrawal symptoms appearing after acute withdrawal resolves. Common symptoms include anxiety, mood swings, sleep disruption, and cravings. It is normal, reduces over time, and most people see significant improvement by 3–6 months.
Can you go through alcohol withdrawal at home?
For people with mild symptoms and no high-risk factors (no prior seizures or DTs, moderate drinking history), home withdrawal with close monitoring may be feasible. For heavy daily drinkers or anyone with a history of DTs or seizures, medically supervised detox is strongly recommended.
Sources & references
National Institute on Alcohol Abuse and Alcoholism (NIAAA). Alcohol withdrawal guidelines. niaaa.nih.gov
Mirijello A, et al. (2015). Identification and management of alcohol withdrawal syndrome. Drugs. 75(4):353–65.
Schuckit MA. (2014). Recognition and management of withdrawal delirium. NEJM. 371:2109–13.
SAMHSA TIP 45: Detoxification and Substance Abuse Treatment. (2015). samhsa.gov
Muncie HL Jr, et al. (2013). Alcohol Use Disorders. American Family Physician. 88(9):589–595.
Need support? SAMHSA: 1-800-662-4357 — free, 24/7. Crisis: call or text 988.