Alcohol withdrawal: CIWA-Ar monitoring, seizure and delirium precautions and thiamine before glucose
- Assessment
Know when withdrawal starts, score it regularly with the CIWA-Ar, keep seizure and fall precautions, give thiamine before glucose and call early for delirium.
What it is
About half of people with alcohol use disorder have withdrawal when they cut down or stop, and some develop hallucinations, seizures or delirium tremens, which is a medical emergency. Because alcohol use is often under-reported, the nurse watches for withdrawal in any inpatient. The CIWA-Ar (Clinical Institute Withdrawal Assessment for Alcohol, revised) is the most widely used scale: it rates the main withdrawal symptoms and orientation, and guides symptom-triggered treatment within the institution's protocol. Alongside it, the nurse monitors vital signs, keeps a quiet, safe room with seizure and fall precautions, supports hydration and nutrition and gives the prescribed thiamine before any glucose to prevent Wernicke's encephalopathy.
Reference values
- Mild symptoms: start about 6–36 hours after the last drink and settle within one to two days without treatment.
- Seizures: about 6–48 hours. Hallucinations: about 12–48 hours. Delirium tremens: about 48–96 hours.
- Delirium tremens: fluctuating attention and cognition with fever, severe tachycardia, hypertension and drenching sweats.
- Scores, reassessment intervals and medicine thresholds: those of the institutional protocol.
What you need
- The CIWA-Ar form used by the institution and the symptom-triggered protocol.
- Thermometer, blood pressure monitor, pulse oximeter, glucometer.
- Suction and oxygen at the bedside; padded rails; low bed.
- A quiet room, lit by day and dimly lit at night.
How to measure it (and why)
- Ask about the time of the last drink, the usual amount and past withdrawal, seizures or delirium — this predicts the timing and the risk of severe withdrawal.
- Take vital signs and temperature and look for tremor, sweating and agitation — rising pulse, blood pressure and temperature are signs of withdrawal.
- Score the CIWA-Ar at the intervals the protocol sets, asking the person and observing them — repeated scores show the trend and trigger treatment.
- Give the prescribed medicine when the score reaches the protocol threshold, then reassess — symptom-triggered care prevents seizures and delirium.
- Check the orders so that thiamine is given before any glucose-containing fluid or food («según protocolo») — this protects against Wernicke's encephalopathy.
- Check capillary glucose as ordered and watch for confusion, eye-movement problems and unsteady gait — these suggest Wernicke's encephalopathy or hypoglycaemia.
- Keep the bed low with padded rails, suction and oxygen ready, and help the person to the bathroom — seizures and falls are common risks.
- Keep the room quiet and lit, encourage fluids and food, and reorient calmly — a calm setting lowers agitation and prevents falls at night.
How to read it
- A rising CIWA-Ar score despite treatment means withdrawal is worsening: report it.
- Over-sedation (difficulty waking, slow breathing) can be a medicine effect: report it per protocol.
- Concurrent benzodiazepine or sedative withdrawal raises the seizure risk.
- Severe withdrawal is best managed in an intensive care unit; delirium tremens can be fatal without proper care.
Next step: when to call for help
- Call at once for a seizure, hallucinations, new confusion or fluctuating attention, fever or severe tachycardia.
- Call if the person is hard to wake or breathing is slow after medicine.
- Call if eye-movement problems, ataxia or confusion suggest Wernicke's encephalopathy.
- Call if the score keeps rising, the person cannot drink fluids or vomiting persists.
Test yourself
Think of the answer, then tap the question to see it.
When do alcohol withdrawal seizures and delirium tremens usually appear?
Seizures about 6–48 hours after the last drink; delirium tremens about 48–96 hours after it.
Why is thiamine given before glucose in a person with heavy alcohol use?
Giving glucose first can precipitate Wernicke's encephalopathy in someone with thiamine deficiency.
What is the CIWA-Ar used for?
To rate alcohol withdrawal symptoms over time and guide symptom-triggered treatment within the institutional protocol.
Which seizure precautions apply during alcohol withdrawal?
Bed in the lowest position, padded side rails, and suction and oxygen ready at the bedside.
Connections
In Pharmacology2
Educational content for students; it does not replace your institution's protocols, supervised clinical training or a prescriber's order. Dose-calculation examples use made-up numbers: they are educational, not a clinical order.
Sources: Nursing: Mental Health and Community Concepts, 14.5: Withdrawal management / detoxification (Open RN, Wisconsin Technical College System (CC BY 4.0), LibreTexts, 2022); Nursing: Mental Health and Community Concepts, 14.11: Applying the nursing process to substance use disorders (Open RN, Wisconsin Technical College System (CC BY 4.0), LibreTexts, 2022); mhGAP Intervention Guide for mental, neurological and substance use disorders in non-specialized health settings, version 2.0 (World Health Organization (WHO), 2016).
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Representative model, for educational purposes only.