Alcohol brief intervention: AUDIT-C screening in Australian general practice

Why alcohol screening belongs in every general practice consultation

Alcohol contributes to approximately 5% of the total burden of disease in Australia, around 6,000 attributable deaths per year, and 150,000 hospitalisations annually. AIHW National Drug Strategy Household Survey 2022–23 data show approximately 31% of Australian adults exceed the NHMRC 2020 lifetime-risk guideline at least monthly, while around 25% exceed the single-occasion threshold. About 3% meet criteria for alcohol use disorder.

General practice is the most common point of contact with the health system for most Australians. The RACGP Red Book classifies alcohol screening and brief intervention as a Grade A preventive activity — the highest evidence grade — applicable at every annual health review, new patient registration, antenatal booking, mental health care plan, and 45–49 / 75+ health assessment.

The core principle: brief intervention works best for hazardous, non-dependent drinkers — the majority of people drinking above the NHMRC threshold. It does not replace specialist care for dependent drinking.

A. Core clinical — the AU general-practice framework

NHMRC 2020 thresholds — what to communicate

The NHMRC 2020 guidelines set the following thresholds for healthy Australian adults:

• No more than 10 standard drinks per week AND no more than 4 on any single day — to reduce lifetime risk of alcohol-related disease and injury
• Pregnancy / planning pregnancy / breastfeeding: no alcohol — no safe level; Foetal Alcohol Spectrum Disorder (FASD) is the leading preventable cause of intellectual disability in Australia (FASD Hub Australia)
• Under 18 years: no alcohol — neurodevelopmental risk

One standard drink = 10 g of pure ethanol — approximately 285 mL regular beer (4.8%), 100 mL wine (12.5%), or 30 mL spirits (40%). Real-world serving sizes typically contain 1.5–2 standard drinks, so deliberate quantification is essential.

The AUDIT-C — three questions that take 90 seconds

The AUDIT-C is the recommended first-line screening tool. Three questions covering drinking frequency, typical daily quantity, and heavy-occasion frequency are each scored 0–4:

• Positive screen = total ≥4 in men, ≥3 in women
• Sensitivity approximately 80–90% for hazardous drinking (Bush et al. Arch Intern Med 1998)
• Takes under 2 minutes; can be embedded in the waiting-room intake form

A positive AUDIT-C triggers the full 10-item AUDIT to differentiate risk levels:

AUDIT score	Risk category	Action
0–7	Low risk	Positive feedback; document; rescreen 12-monthly
8–15	Hazardous	Brief intervention (5As + FRAMES); SMART goals; review 1 month
16–19	Harmful	Structured behavioural intervention; consider naltrexone or acamprosate; monitor LFTs
≥20	Likely dependence	Specialist referral — see below; do not manage alone

Document AUDIT-C scores in the problem list at every annual review — embed it in the review template, not as a special project.

Brief intervention — the 5As and FRAMES

Australian Guidelines for the Treatment of Alcohol Problems 2021 and eTG Addiction recommend the following approach for hazardous and harmful drinking:

5As framework (RACGP Red Book):

1. Ask — complete the AUDIT-C; quantify intake in standard drinks; note pattern (daily vs binge)
2. Advise — clear, personalised, NHMRC-aligned. Example: “Your current intake of approximately 20 standard drinks a week is double the NHMRC guideline and is likely contributing to your elevated blood pressure and raised GGT.”
3. Assess — readiness to change using an importance/confidence scale (0–10); full AUDIT if AUDIT-C positive; DSM-5 criteria if AUDIT ≥15 to exclude dependence
4. Assist — set a SMART goal (e.g., two alcohol-free days/week, cap at two drinks per occasion); provide DrinkWise tools and the Hello Sunday Morning Daybreak app; provide a drink diary; consider pharmacotherapy for AUDIT 16–19 in motivated patients; refer DACAS on 1800 812 804 if uncertain
5. Arrange — book a 1-month review, then 3–6-monthly; flag alcohol intake in the problem list

FRAMES (Motivational Interviewing structure):

• Feedback — personalised on current intake and lab findings (GGT, MCV)
• Responsibility — affirm that change is the patient’s choice
• Advice — clear recommendation
• Menu of options — cut down, cut out, change context, digital tools, pharmacotherapy, referral
• Empathy — reflective listening; not lecturing
• Self-efficacy — affirm capability; draw on past successes

Both frameworks are evidence-graded 🟢 in the Australian Guidelines 2021 and by the Cochrane review (Kaner 2018).

When to investigate

Brief intervention does not require investigations for all patients. Order when:

• AUDIT ≥8 with hepatic risk factors or signs (jaundice, hepatomegaly, spider naevi, parotid enlargement)
• Pregnancy
• Hypertension, atrial fibrillation, suspected metabolic-associated steatotic liver disease
• Pharmacotherapy planned: baseline FBC, LFT, UEC, lipids, HbA1c, B12, folate, vitamin D — and ECG before naltrexone if cardiac risk factors

GGT and MCV have modest sensitivity (30–50%) individually, but trend over time is clinically useful — a falling GGT corroborates patient-reported reduction in intake.

B. Evidence for brief intervention

Cochrane review by Kaner et al. 2018 (34,000 participants across 69 RCTs): brief intervention vs control reduced drinking by approximately 20 g ethanol per week (2–3 standard drinks) sustained at 12 months. NNT approximately 8–10 for hazardous drinkers. The USPSTF 2018 and NICE PH24 both endorse brief intervention as cost-effective and high-yield at the population level.

Effect is substantially smaller in alcohol-dependent patients — who need structured specialist care, not brief intervention alone. A single brief contact is effective; 2–3 follow-up contacts add some incremental benefit for moderate-range AUDIT scores.

Digital brief interventions — DrinkWise tools, Hello Sunday Morning Daybreak, the Counselling Online platform — reduce drinking by approximately 3 drinks per week in online cohorts. These are useful adjuncts, particularly for patients reluctant to discuss alcohol in person or in rural and remote settings.

C. Health harms from alcohol — the clinical case for intervening

Alcohol is an IARC Group 1 carcinogen — no safe level for cancer risk. Relevant harms across body systems:

• Cancer: oropharyngeal, oesophageal, hepatocellular, colorectal, breast (even at low intake)
• Cardiovascular: hypertension, atrial fibrillation, dilated cardiomyopathy, haemorrhagic stroke
• Liver: steatosis → alcoholic steatohepatitis → fibrosis → cirrhosis → hepatocellular carcinoma; synergises with metabolic liver disease
• Mental health: depression, anxiety, suicidality (2–3× comorbidity); alcohol fragments sleep architecture, worsening insomnia
• Pregnancy: Foetal Alcohol Spectrum Disorder — a leading preventable cause of intellectual disability (FASD Hub Australia)
• Injury: motor vehicle crashes, falls, burns, drowning, interpersonal violence — alcohol is involved in approximately 50% of partner violence presentations
• Neurology: Wernicke-Korsakoff syndrome (thiamine deficiency), peripheral neuropathy, cerebellar degeneration

Framing the health risk concisely in the consultation — personalised to the patient’s existing conditions (raised blood pressure, elevated GGT, sleep problems, anxiety) — makes the NHMRC guidance concrete and relevant.

D. Australian operations

MBS items for alcohol brief intervention:

• Standard GP consultations (items 23 / 36 / 44) and telehealth equivalents (items 91790 / 92029 / 92060)
• 45–49 year health assessment (items 701–709); 75+ health assessment; ATSI health assessment (item 715 + follow-up item 10987)
• Chronic Disease Management Plan (items 965 / 967) — if alcohol is contributing to a chronic condition
• Mental Health Treatment Plan (items 2715 / 2717) — for comorbid anxiety, depression, or PTSD; psychology referral (Better Access items 80000–80020)
• Dietitian under CCDMP (item 10954)

PBS pharmacotherapy (AUDIT ≥16 or established AUD, with Authority):

• Acamprosate — Authority Required (Streamlined) for relapse prevention in AUD
• Naltrexone — Authority Required for AUD
• Thiamine 100 mg, B-complex, folate — general schedule; essential in chronic heavy use (Wernicke prevention)
• SSRIs for comorbid depression / anxiety — general schedule

Drug and alcohol services:

• DACAS (Drug and Alcohol Clinical Advisory Service, Vic) — clinician advice line 1800 812 804
• ADIS — state-based 24/7 consumer and carer helplines (NSW 1800 250 015; Qld 1800 177 833; SA 1300 131 340)
• Counselling Online — counsellingonline.org.au — free confidential online counselling
• National Alcohol and Other Drug Hotline 1800 250 015
• Lifeline 13 11 14; 1800RESPECT 1800 737 732

SafeScript monitoring applies to any benzodiazepine prescription in the context of alcohol — this includes supervised withdrawal. Check prescribing history before any sedative prescription in a patient with known heavy alcohol use.

E. Special populations

Pregnancy. Universal counselling — no alcohol, no safe level. Framing matters: avoid retrospective guilt about early-pregnancy exposure before the patient knew they were pregnant; focus on stopping from now. Refer DACAS and perinatal addiction services. FASD Hub Australia has resources for patients and families.

Under 18 years. Use the HEEADSSS psychosocial assessment framework for adolescent consultations. Confidentiality principles and Gillick competence apply. Unambiguous no-alcohol message; involve Reach Out and headspace.

Older adults. Same numerical NHMRC thresholds, but effectively lower tolerance due to reduced lean body mass, polypharmacy interactions (benzodiazepines, opioids, warfarin INR variability, SSRI bleeding risk), falls, and cognitive function. Address benzodiazepine co-prescribing explicitly.

Mental illness. Depression, anxiety, and PTSD co-occur with hazardous drinking 2–3 times more than in the general population. Integrated treatment (addressing both simultaneously with CBT and pharmacotherapy) outperforms sequential treatment. SSRI is safe with naltrexone and acamprosate.

Aboriginal and Torres Strait Islander Australians. Culturally tailored programs significantly outperform generic approaches. Avoid moralising framing; coordinate with Aboriginal Drug and Alcohol Workers; use ACCHS pathways; Strong Spirit Strong Mind is a WA-based resource. ATSI communities have higher rates of abstinence than the general population alongside higher rates of harm in those who do drink — this nuance matters clinically.

When to escalate

Refer to specialist drug and alcohol services when:

• AUDIT score ≥20 — likely alcohol dependence; complex management including supervised withdrawal
• Prior alcohol withdrawal seizure or delirium tremens history — high-risk withdrawal requiring specialist planning
• Suicidality in the context of intoxication — immediate mental health assessment
• Concurrent benzodiazepine or opioid dependence — polydrug assessment required
• Pregnancy with confirmed heavy drinking — perinatal addiction service
• Cognitive impairment or falls in older adults on alcohol plus polypharmacy
• Persistently raised GGT / MCV despite reported intake reduction — specialist hepatology if MASLD or cirrhosis suspected
• Domestic violence disclosure — 1800RESPECT; safety planning; DFV pathways

What this article is and is not

This is general health information drawn from current Australian guidelines — NHMRC 2020 Alcohol Guidelines, Australian Guidelines for the Treatment of Alcohol Problems 2021, RACGP Red Book, eTG Addiction, and AIHW. It is not personal medical advice and does not create a doctor–patient relationship. Decisions about investigation, intervention, and referral are made with your own GP and treating clinicians.

For consumer resources: HealthDirect — Alcohol, DrinkWise, Hello Sunday Morning, Counselling Online.

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Sources cited

1. NHMRC — Australian Alcohol Guidelines 2020
2. Australian Guidelines for the Treatment of Alcohol Problems 2021
3. RACGP Red Book
4. Therapeutic Guidelines (eTG) — Addiction
5. Australian Medicines Handbook
6. AIHW — National Drug Strategy Household Survey 2022–23
7. AIHW — Alcohol, tobacco and other drugs in Australia 2024
8. Kaner EFS et al. — Cochrane brief alcohol interventions 2018
9. Bush K et al. — AUDIT-C (Arch Intern Med 1998)
10. USPSTF 2018 — Alcohol use screening and brief counselling
11. HealthDirect — Alcohol
12. DrinkWise Australia
13. FASD Hub Australia
14. DACAS clinician advice line
15. IARC Monograph 100E — alcohol carcinogenicity