Alcohol withdrawal and delirium tremens — Rapid

Synopsis

Recognise alcohol withdrawal early, select a safe monitored setting, use benzodiazepine regimens proportionately, and treat seizures or delirium tremens as time-critical complications while preventing oversedation and missed alternative diagnoses.

Alcohol withdrawal follows a substantial fall in alcohol exposure in a neuroadapted person; do not require a zero breath-alcohol concentration before recognising it.
Early features include tremor, sweating, tachycardia, hypertension, nausea, anxiety, insomnia and perceptual disturbance; seizures usually occur early and delirium often emerges later.
People at high risk of seizures or delirium tremens should be admitted for medically assisted withdrawal; vulnerable patients warrant a lower admission threshold.
In hospital or another setting with continuous skilled assessment, NICE recommends a symptom-triggered regimen; planned community withdrawal generally uses an individually selected fixed taper with daily review.
A current national example for moderate dependence starts oral chlordiazepoxide 15 mg four times on day 1, then 10 mg four times day 2, 10 mg three times day 3, 5 mg three times day 4, 5 mg twice day 5, 5 mg at night day 6, then stop; it is an example, not a universal prescription.
For delirium tremens, ensure the benzodiazepine withdrawal regimen is adequate; NICE names oral lorazepam first, with parenteral lorazepam if symptoms persist or oral treatment is not possible.
Haloperidol is not benzodiazepine replacement or monotherapy for withdrawal delirium; current national guidance restricts it to carefully monitored adjunct use after adequate benzodiazepine because it can lower seizure threshold.
Treat a withdrawal seizure with a rapid-acting benzodiazepine under an acute protocol and review the withdrawal regimen; phenytoin does not treat the withdrawal mechanism.

Key red flags

A generalised seizure after alcohol reduction requires urgent assessment; consider head injury, hypoglycaemia, infection, metabolic disturbance and other toxicological causes as well as withdrawal.

New disorientation, fluctuating attention, marked agitation, hallucinations, fever or severe autonomic activation may indicate delirium tremens or another acute delirium.

Respiratory slowing, falling oxygen saturation, new ataxia or increasing drowsiness during benzodiazepine treatment suggests oversedation and requires immediate review.

Haematemesis, melaena, jaundice, ascites, abdominal pain, sepsis signs, arrhythmia or major electrolyte derangement requires parallel medical management.

Previous delirium tremens or withdrawal seizures, very heavy use, frailty, pregnancy, cognitive impairment, severe comorbidity or poor social support lowers the threshold for admission.

Investigation priorities

Repeated clinical observationsFirst step

Track pulse, blood pressure, respiratory rate, oxygen saturation, temperature, consciousness and fluid balance.

Management branches

TriageSelect the safe setting

A dependent drinker has stopped, substantially reduced intake or plans medically assisted withdrawal.

Assess current symptoms, previous seizures or delirium, daily consumption, other sedatives, comorbidity, pregnancy, cognition and support.
Admit when severe or complicated withdrawal is present or likely; use a lower threshold for vulnerable circumstances.
If community management is suitable, provide a clinician-selected fixed regimen, limited dispensing, daily review, thiamine and explicit escalation instructions.

Key medicines

Chlordiazepoxide, planned fixed-dose exampleFor moderate dependence, one current national oral example is 15 mg four times daily on day 1; 10 mg four times daily day 2; 10 mg three times daily day 3; 5 mg three times daily day 4; 5 mg twice daily day 5; 5 mg at night day 6; stop day 7, with daily skilled review and adjustment.This is an example rather than a self-detox prescription. Dose must reflect dependence and setting; reduce or choose a shorter-acting alternative for frailty or substantial liver impairment, avoid unsupervised co-use with alcohol, opioids or other sedatives, and monitor respiratory state and oversedation.

Lorazepam for delirium tremensUse oral lorazepam as NICE first-line treatment within a hospital protocol; if delirium persists or oral medication is declined or unsafe, use parenteral lorazepam with dose and repetition determined by the acute local protocol, continuous observations and senior review.This indication is off label in UK guidance. Monitor airway and respiration, especially with hepatic disease or other depressants; escalating requirement, persistent agitation or oversedation requires senior and critical-care input rather than unmonitored repeated dosing.

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