Why use it

BAWS provides a rapid, structured assessment of alcohol withdrawal severity that can guide pharmacological management. It complements the CIWA-Ar with a slightly simpler format. Validated for identifying patients at risk for severe withdrawal complications including seizures and delirium tremens. Enables consistent documentation across providers.

About

The Brief Alcohol Withdrawal Scale (BAWS) is a validated clinical tool designed to assess and monitor the severity of alcohol withdrawal syndrome. It evaluates eight key domains of alcohol withdrawal including nausea/vomiting, tremor, sweating, anxiety, agitation, headache, orientation, and perceptual disturbances. Unlike the CIWA-Ar (which requires patient participation and verbal interaction), the BAWS can be more quickly administered and is practical for busy clinical settings. It guides symptom-triggered benzodiazepine therapy in inpatient and emergency contexts.

When to use

Patients admitted with known or suspected alcohol use disorder and last drink within 7–10 days
Monitoring patients in alcohol detoxification protocols
Emergency department assessment of alcohol withdrawal
Guiding symptom-triggered benzodiazepine dosing in medical and psychiatric units
Serial reassessment every 2–4 hours during active withdrawal management

Formula

BAWS = sum of 8 items (0–2 each), total range 0–16 Items assessed: Nausea/Vomiting, Tremor, Sweating, Anxiety, Agitation, Headache/Head fullness, Orientation/Clouding, Perceptual disturbances 0 = None 1 = Mild/Moderate 2 = Severe Score 0–5: Mild | 6–10: Moderate | ≥11: Severe

Pearls & pitfalls

BAWS can be administered even in patients who cannot verbalize well due to its partially observational nature.
Always supplement with thiamine 100–500 mg IV before or concurrent with glucose administration to prevent Wernicke encephalopathy.
Peak withdrawal risk: seizures typically occur 12–48 hours after last drink; delirium tremens at 48–96 hours.
A patient may have BAWS < 6 but still be at risk for seizures based on history (prior withdrawal seizures, prior DT).
Prophylactic benzodiazepines for high-risk patients (prior withdrawal seizures, prior DT) may be appropriate regardless of BAWS score.
BAWS does not replace clinical judgment — always consider the full clinical picture, comorbidities, and medications.

Next steps

Score 0–5: Mild withdrawal — monitoring, thiamine + folate supplementation, hydration; medications may not be required. Score 6–10: Moderate withdrawal — initiate symptom-triggered benzodiazepine therapy (lorazepam or chlordiazepoxide); reassess every 1–2 hours. Score ≥ 11: Severe withdrawal — aggressive benzodiazepine treatment; consider ICU admission; high risk for seizures and delirium tremens.

Evidence

Sillanaukee P et al. (Alcohol Alcohol 1995) validated BAWS in patients undergoing alcohol detoxification. Subsequent studies confirmed its reliability and correlation with CIWA-Ar scores. Used in European and UK alcohol detoxification guidelines.

References

Sillanaukee P et al. Screening for problem drinking: evaluation of the CAGE questionnaire and BAWS. Alcohol Alcohol. 1995;30(1):103-109. — link
Stockwell T, Bolt E, Milner I, Pugh P, Young I. The development of a questionnaire on attitudes towards and knowledge of alcohol. Br J Addict. 1991;86(8):1037-1043. — link

Brief Alcohol Withdrawal Scale (BAWS)

Calculator