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Withdrawal after long-term heavy drinking can cause seizures and delirium tremens, which carries a real risk of death. Supervised withdrawal is safer and works considerably better.
The danger of stopping abruptly
In a person who has been drinking heavily every day for months or years, the nervous system adapts to the constant presence of alcohol. Removing it suddenly leaves that system in a state of over-excitation, which produces withdrawal symptoms — and in a minority, seizures and delirium tremens.
Delirium tremens typically begins 48 to 72 hours after the last drink, with confusion, agitation, hallucinations, fever, sweating and dangerous swings in blood pressure and heart rate. Untreated, it has a significant death rate. Treated in hospital, most patients recover fully.
Worth knowing
Never attempt sudden withdrawal at home in someone who drinks heavily every day, has withdrawal symptoms in the morning, or has had a fit during a previous attempt to stop. Seek medical supervision.
The withdrawal timeline
- 6–12 hours: tremor, anxiety, sweating, nausea, headache, insomnia
- 12–24 hours: hallucinations, usually visual, with insight retained
- 24–48 hours: risk of withdrawal seizures is highest
- 48–72 hours and beyond: delirium tremens in a minority — confusion, severe agitation, fever, autonomic instability
Signs of dependence
- Needing more alcohol to achieve the same effect
- Drinking in the morning, or feeling shaky until the first drink
- Unsuccessful attempts to cut down
- Continuing despite clear harm to health, work or relationships
- Neglecting responsibilities or interests because of drinking
- Strong cravings
- Withdrawal symptoms when not drinking
What treatment involves
Medically supervised detoxification uses benzodiazepines in a tapering regimen to prevent seizures and delirium, alongside thiamine (vitamin B1) to prevent Wernicke's encephalopathy — a brain injury caused by thiamine deficiency that can leave permanent memory damage. Fluids, electrolytes and nutritional support are given as required.
Detoxification alone is not treatment. Relapse rates after detox without follow-up are extremely high. What sustains recovery is anti-craving medication, counselling and psychotherapy, treatment of underlying depression or anxiety, family involvement, and ongoing support such as Alcoholics Anonymous.
For families
- Dependence is a medical condition, not a moral failing — but the person must want treatment for it to work
- Do not conceal the extent of drinking from the treating team; accurate information affects safety
- Remove alcohol from the house during recovery
- Attend counselling sessions when invited — family involvement measurably improves outcomes
- Expect relapse as a possibility rather than a catastrophe; most successful recoveries include one
- Look after your own wellbeing too
Key takeaways
- Sudden withdrawal in heavy daily drinkers can cause seizures and delirium tremens.
- Withdrawal seizure risk peaks 24–48 hours after the last drink.
- Thiamine is essential during detoxification to prevent permanent brain injury.
- Detoxification without follow-up treatment almost always ends in relapse.
A note on medical advice
This article is general health education written and reviewed by the Department of Psychiatry at SIMS. It is not a substitute for an examination, a diagnosis or the advice of your own treating doctor, and it cannot account for your history, medicines or reports. If a symptom is sudden or severe — chest pain, stroke symptoms, breathing difficulty, serious injury, seizures or heavy bleeding — call 9281862028 or come straight to the emergency department instead of reading further.
AlcoholDe-addictionWithdrawalMental health