Alcohol Use Disorder in New Zealand: Symptoms, Causes & Treatment

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Alcohol Use Disorder in New Zealand: Symptoms, Causes & Treatment | aihealz

§ 02

How you might notice it

01Drinking more alcohol or for longer periods than originally intended on most occasions over the past year.

02Repeated unsuccessful attempts to cut down or stop drinking, including failed promises to oneself or others.

03Significant time spent obtaining alcohol, drinking, or recovering from drinking — sometimes hours each day.

04Strong cravings or urges to drink, often triggered by specific places, people, emotions, or times of day.

05Continued drinking despite recurring problems at work, school, or home such as absenteeism, missed responsibilities, or poor performance.

06Continued drinking despite ongoing interpersonal problems caused or worsened by alcohol use.

07Giving up or reducing important social, occupational, or recreational activities because of drinking.

08Repeated drinking in physically hazardous situations such as driving, swimming, or operating machinery.

09Continued drinking despite knowing it is worsening a physical or psychological condition such as liver disease, depression, or hypertension.

10Tolerance — needing markedly more alcohol to achieve the same effect, or noticeably reduced effect from the same amount.

11Withdrawal symptoms (tremor, sweating, anxiety, insomnia, nausea, racing heart) when drinking is stopped or reduced, or drinking to relieve or avoid these symptoms.

early warning signs

•Drinking more than 14 standard drinks per week for men or 7 for women (NIAAA at-risk thresholds)
•Family or friends starting to comment on the amount or frequency of drinking
•Drinking alone or early in the day to manage anxiety, sleep, or stress
•Failed attempts to set personal rules about drinking (no drinks before 6pm, only on weekends, etc.) within the past 12 months
•Memory blackouts during or after drinking episodes

● emergency signs

•Severe tremor, confusion, hallucinations, or seizures within 6-72 hours of the last drink — possible delirium tremens, mortality 5-15% untreated
•Sudden confusion with eye-movement abnormalities and ataxia — Wernicke's encephalopathy requiring immediate IV thiamine before glucose
•Vomiting blood or black tarry stools in a heavy drinker — possible variceal hemorrhage from cirrhosis
•Severe abdominal pain with nausea, vomiting, and tenderness — possible acute pancreatitis
•Acute suicidality during intoxication or withdrawal — drinking and suicide risk are tightly linked

§ 03

How it’s diagnosed

diagnosis

Diagnosis is clinical, made by interview using the DSM-5-TR criteria — a person who meets 2 or more of 11 criteria within a 12-month period has AUD, with severity graded by criterion count. Screening should be universal in primary care; the AUDIT (Alcohol Use Disorders Identification Test) is the WHO-validated 10-item instrument with sensitivity over 90% at a cutoff of 8. The 3-item AUDIT-C is the most common short version used in busy practice; a score of 4+ in men or 3+ in women triggers further assessment. The single-question screen — 'How many times in the past year have you had X or more drinks in a day?' (5 for men, 4 for women) — is over 80% sensitive. After a positive screen, a structured DSM-5-TR criterion review establishes the diagnosis and severity. Biomarkers play a secondary role: gamma-glutamyl transferase, mean corpuscular volume, carbohydrate-deficient transferrin, and phosphatidylethanol (PEth) can support the diagnosis or monitor abstinence, but none are sensitive or specific enough to replace clinical interview. Always assess comorbid conditions: depression and anxiety screening, suicide risk, hepatic function (ALT, AST, GGT, INR, platelets, albumin), nutritional status, and withdrawal risk using the CIWA-Ar scale if recent heavy use. Distinguish AUD from primary mood and anxiety disorders by attending to which preceded the other and how symptoms behave during periods of sobriety lasting at least 4 weeks.

Key tests

AUDIT (Alcohol Use Disorders Identification Test) — 10-item screening toolValidated WHO screening instrument. Scores of 8+ (men) or 7+ (women) indicate hazardous drinking; 15+ indicates likely AUD. Used in primary care, emergency departments, and pre-employment screening worldwide.

AUDIT-C — 3-item short formBrief screen suitable for busy primary care. Scores 4+ (men) or 3+ (women) indicate at-risk drinking warranting follow-up. Used by VA and US Preventive Services Task Force.

Structured DSM-5-TR criteria interviewConfirms diagnosis and grades severity (mild 2-3, moderate 4-5, severe ≥6). The reference standard following a positive screen.

Liver function panel (ALT, AST, GGT, bilirubin, INR, albumin, platelet count)Detects alcohol-related liver damage. AST:ALT ratio above 2 suggests alcoholic etiology; GGT is elevated in 70% of heavy drinkers. Establishes baseline for medication choices.

Phosphatidylethanol (PEth)Quantitative biomarker of alcohol consumption over the past 2-4 weeks. Sensitive to as little as one drink and helpful for monitoring abstinence in court-ordered cases, transplant evaluation, or relapse assessment.

CIWA-Ar (Clinical Institute Withdrawal Assessment for Alcohol, Revised)Quantifies withdrawal severity to guide benzodiazepine dosing during detoxification. Scores 8-15 mild, 16-20 moderate, >20 severe withdrawal.

Outlook

AUD is a chronic relapsing condition with outcomes comparable to type 2 diabetes or hypertension in adherence-corrected analyses. Roughly one-third of people achieve sustained remission (no recurrence at 1 year) after a single course of evidence-based treatment, another third achieve substantial reduction in drinking and harm without full abstinence, and the remaining third return to problematic use within 12 months. Relapse rates fall over time: at 5 years of continuous abstinence, the annual relapse rate drops to under 10%. Medications combined with behavioral therapy roughly double abstinence rates compared with no treatment. Long-term mortality from AUD is significantly elevated — 26-fold higher than population baseline in severe AUD, driven by liver disease, cardiovascular events, accidents, and suicide. Untreated, life expectancy is reduced by an average of 24-28 years compared to people without AUD (Westman 2015 Scandinavian cohort). Treated patients reach population-typical life expectancy when sustained abstinence is achieved before significant organ damage.

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Causes & risk factors

known causes

Genetic vulnerability: Twin and adoption studies place heritability at 50-60%. Variants in ADH1B, ALDH2, GABRA2, OPRM1, and CHRNA5 modulate alcohol metabolism, reward sensitivity, and craving. Family history of AUD in first-degree relatives triples personal risk.
Neuroadaptation in reward and stress circuits: Chronic alcohol exposure downregulates GABA receptors and upregulates glutamate NMDA signaling, producing tolerance, withdrawal hyperexcitability, and dysphoria during abstinence. The mesolimbic dopamine system becomes dependent on alcohol-stimulated firing to register reward.
Early-life trauma and chronic stress: Adverse childhood experiences (ACE score ≥4) raise lifetime AUD risk roughly 7-fold (Felitti 1998 ACE Study). Chronic stress upregulates the extended amygdala CRF system, driving negative-reinforcement drinking.
Comorbid psychiatric disorders: Depression, anxiety disorders, PTSD, ADHD, and bipolar disorder all elevate AUD risk. Self-medication of distressing affect through alcohol's short-acting anxiolytic effect is one mechanism; shared genetic vulnerability is another.
Early age of first drink: First intoxication before age 14 is associated with roughly 4-fold higher lifetime AUD risk compared to first drink after age 21. The adolescent brain's plasticity makes it particularly vulnerable to addictive neuroadaptation.
Cultural and economic availability of alcohol: Population-level alcohol consumption tracks closely with price, density of liquor outlets, marketing exposure, and cultural norms. Tax increases and outlet restrictions consistently reduce AUD prevalence in epidemiologic data.

risk factors

Family history of AUDgenetic: First-degree relative with AUD triples personal lifetime risk. Genetic loci include ADH1B, ALDH2 (East Asian flush variant is actually protective), GABRA2, and OPRM1.
Male sexnon-modifiable: Men have twice the prevalence of AUD in most populations, though the gap is narrowing rapidly — women under 40 now drink at near-male rates in many high-income countries.
Onset of drinking before age 14modifiable: Early drinking initiation predicts 4-fold higher lifetime AUD risk. Adolescent brain plasticity heightens neuroadaptive change from alcohol exposure.
Comorbid depression, anxiety, PTSD, or bipolar disordermodifiable: Roughly 40% of people with AUD have a co-occurring psychiatric disorder. Integrated treatment of both conditions improves outcomes for each.
Adverse childhood experiences (ACEs)non-modifiable: ACE score of 4 or more raises lifetime AUD risk approximately 7-fold (Felitti 1998 ACE Study). Trauma-informed care improves engagement.
Chronic pain or insomniamodifiable: Drinking for sleep or pain relief is a common entry point. Addressing the underlying pain or sleep disorder substantially improves AUD outcomes.
High alcohol availability and low priceenvironmental: Population-level consumption tracks with outlet density, tax level, and advertising exposure. Policy-level interventions reduce population AUD prevalence by 10-25% in modeling studies.
Occupation with high drinking culturemodifiable: Hospitality, military, finance, and trades historically have above-average AUD rates due to availability, peer norms, and stress.

§ 07

When to seek help

why see a psychiatry

A psychiatrist or addiction medicine specialist should be involved for moderate-to-severe AUD, for patients with co-occurring psychiatric disorders, after failed initial treatment, for medically complex withdrawal, or where extended-release injectable medications and structured intensive outpatient programs are needed. Primary care can effectively manage mild AUD with brief intervention plus oral naltrexone or acamprosate, and screening should always begin in primary care.

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01Alcohol-related liver disease — fatty liver, alcoholic hepatitis, and cirrhosis, occurring in 10-20% of long-term heavy drinkers

02Alcohol withdrawal seizures and delirium tremens — mortality 5-15% untreated, requiring inpatient management

03Wernicke-Korsakoff syndrome — thiamine deficiency causing ophthalmoplegia, ataxia, confusion, and permanent amnesia if untreated

04Alcohol-induced cardiomyopathy with reduced ejection fraction, often partially reversible with sustained abstinence

05Increased risk of oropharyngeal, esophageal, liver, breast, and colorectal cancers — alcohol is a Group 1 IARC carcinogen

06Suicide, accidents, and interpersonal violence — alcohol is implicated in roughly 25% of US suicides and 30% of homicides

07Fetal alcohol spectrum disorders if drinking continues during pregnancy

choosing the right hospital

01On-site addiction medicine or psychiatric consultation service
02Protocols for symptom-triggered benzodiazepine withdrawal management using CIWA-Ar
03Parenteral thiamine available and used routinely before glucose in admitted patients
04Linkage to outpatient AUD pharmacotherapy clinic on discharge
05Capacity to manage acute medical complications (variceal bleeding, hepatic encephalopathy, pancreatitis)

Essential facilities

Hazelden Betty Ford Foundation (US), Caron Treatment Centers (US) — residential treatment with strong evidence baseVeterans Health Administration addiction programs (US) — integrated mental-health and AUD carePriory Group hospitals (UK) — private inpatient and outpatient addiction careNIAAA Alcohol Treatment Navigator — free public tool to find evidence-based US treatment

Living with Alcohol Use Disorder

Timeline

Acute withdrawal resolves over 3-7 days with appropriate management. Post-acute withdrawal — sleep disturbance, mood instability, craving — lasts 2-12 weeks. Cognitive recovery from chronic alcohol exposure continues over 6-24 months. Liver enzymes normalize within 6-8 weeks of abstinence in the absence of cirrhosis. Most patients describe meaningful quality-of-life improvement within 3 months. Long-term remission rates rise progressively with each year of continuous abstinence, with the steepest reduction in relapse risk during years 1-5.

Lifestyle

01Identify personal high-risk triggers (specific people, places, emotions, times of day) and develop concrete avoidance or coping plans for each
02Build a structured weekly routine including exercise, sleep, social contact, and meaningful activity — boredom and unstructured time are major relapse triggers
03Replace drinking rituals with non-alcohol alternatives (sparkling water with bitters at social events, walking after dinner instead of evening wine)
04Maintain regular sleep (7-9 hours nightly) — sleep deprivation is one of the strongest predictors of relapse in the first year
05Engage with a mutual-support group at least weekly during the first year of recovery; AA, SMART Recovery, Refuge Recovery, and online communities all work
06Inform trusted family or friends about the diagnosis and ask for explicit support — secrecy is a relapse risk factor

Daily management

01Take medication at the same time daily — adherence is the single strongest predictor of treatment success
02Keep a daily log of cravings, triggers, and slips; review weekly with your clinician or sponsor
03Attend at least one mutual-support meeting weekly during the first year of recovery
04Maintain consistent sleep, exercise, and meal timing to stabilize the dysregulated stress and reward systems
05Have an explicit relapse plan: who you will call, where you will go, and what you will do in the first hour after a slip

Exercise

Regular aerobic exercise (30 minutes most days) reduces craving, improves mood, and supports sleep — all major drivers of relapse. Strength training twice weekly counters sarcopenia from chronic alcohol use. Avoid high-intensity exercise during the first 5-7 days of withdrawal due to autonomic instability. Group exercise classes can substitute for the social rituals previously built around drinking.

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Frequently asked

What is alcohol use disorder?

Alcohol use disorder (AUD) is the medical diagnosis for problematic drinking. It is defined by meeting 2 or more of 11 criteria in the DSM-5-TR within a 12-month period — including loss of control over how much you drink, tolerance, withdrawal, craving, and continued use despite harm.

How do I know if I have alcohol use disorder?

The simplest screen is the AUDIT-C: how often do you drink, how many drinks on a typical day, and how often do you have 6 or more drinks on one occasion. A score of 4+ in men or 3+ in women indicates at-risk drinking.

Is alcohol use disorder a disease?

Yes. The American Medical Association classified alcoholism as a disease in 1956. Brain-imaging and genetic studies confirm that chronic alcohol use produces measurable changes in reward, stress, and executive-function circuits.

Can alcohol use disorder be cured?

AUD is not curable in the sense that the underlying vulnerability remains, but it is highly treatable and goes into long-term remission for many people.

What medications treat alcohol use disorder?

Three medications have FDA approval: naltrexone (oral or monthly injection) reduces craving and heavy drinking; acamprosate supports abstinence after detox; disulfiram causes an aversive reaction if alcohol is consumed. Off-label evidence supports topiramate, gabapentin, and baclofen.

What is alcohol withdrawal?

Alcohol withdrawal is the constellation of symptoms that follow stopping or reducing heavy drinking. Mild withdrawal (tremor, anxiety, insomnia, sweating) starts 6-24 hours after the last drink.

Do I need to be hospitalized to stop drinking?

Not always. Mild withdrawal can be managed at home with a clinician's supervision. Hospital detoxification is indicated for prior withdrawal seizures, prior delirium tremens, heavy daily drinking (>10 drinks/day), severe medical or psychiatric comorbidity, or a CIWA-Ar score above 15.

Is moderate drinking safe in alcohol use disorder?

For most people with moderate or severe AUD, sustained abstinence is the most reliable outcome. For mild AUD, controlled drinking goals can work for selected motivated patients with no medical complications, and naltrexone supports this approach.

How does naltrexone work for alcohol use disorder?

Naltrexone blocks mu-opioid receptors, blunting the dopamine release that makes alcohol rewarding. People still feel the alcohol but report it as less pleasurable, which reduces heavy drinking and craving. It can be taken as a daily pill or as a once-monthly intramuscular injection (Vivitrol).

What is the Sinclair Method?

The Sinclair Method is an evidence-based approach using naltrexone taken 1 hour before drinking rather than daily. Over months, the brain's association of alcohol with reward fades, and many users gradually drink much less or stop altogether.

Can alcohol use disorder be genetic?

Yes. Twin and adoption studies place AUD heritability at 50-60%. Having a first-degree relative with AUD triples personal lifetime risk. Specific gene variants in ADH1B, ALDH2, GABRA2, OPRM1, and CHRNA5 modulate metabolism, reward sensitivity, and craving.

How long does alcohol withdrawal last?

Acute physical withdrawal symptoms peak within 24-72 hours after the last drink and resolve over 5-7 days. Post-acute withdrawal — sleep disturbance, mood instability, craving — can last 2-12 weeks.

Will my liver recover if I stop drinking?

Fatty liver (steatosis) reverses fully within 4-6 weeks of abstinence. Alcoholic hepatitis can resolve over 3-6 months in many cases. Cirrhosis (advanced scarring) does not reverse, but progression halts and complications (variceal bleeding, ascites, encephalopathy) become manageable.

Is Alcoholics Anonymous effective?

Yes. Multiple rigorous studies (including a 2020 Cochrane review) show AA roughly doubles 1-year abstinence rates compared to no treatment and matches or exceeds professional CBT in some head-to-head trials. AA works best combined with medication and is free and globally available.

Can women get alcohol use disorder?

Yes, and rates in women are rising rapidly. Women metabolize alcohol differently due to lower body water and less gastric alcohol dehydrogenase, so the same intake produces higher blood alcohol levels.

Can teenagers have alcohol use disorder?

Yes. AUD can be diagnosed in adolescents using DSM-5-TR criteria, with adjustments for developmental context. 5 million US adolescents aged 12-17 met AUD criteria in 2022 (SAMHSA). First drink before age 14 raises lifetime AUD risk approximately 4-fold.

What is delirium tremens?

Delirium tremens (DTs) is the most severe form of alcohol withdrawal, occurring in 3-5% of patients with severe AUD who stop drinking abruptly. It features severe confusion, hallucinations, tremor, autonomic instability, and seizures, beginning 48-96 hours after the last drink.

How much alcohol is too much?

NIAAA low-risk drinking limits are no more than 14 standard drinks per week for men, 7 for women, and no more than 4 in a single occasion for men or 3 for women. Even within these limits, alcohol carries small increases in cancer and cardiovascular risk. Lower is safer; no level is risk-free.

Does alcohol cause cancer?

Yes. The International Agency for Research on Cancer (IARC) classifies alcohol as a Group 1 carcinogen with strong evidence for cancers of the mouth, throat, esophagus, liver, breast, and colorectum.

How much does AUD treatment cost?

Outpatient medications (oral naltrexone, acamprosate, disulfiram) are inexpensive generics, often under USD 30 per month. Extended-release naltrexone injection costs roughly USD 1,500 per month at retail but is widely covered by insurance.

Alcohol Use Disorder.Care & specialists in New Zealand

What it is

How you might notice it

How it’s diagnosed

Treatment & cost

Causes & risk factors

Living with it

When to seek help

Related conditions

Easily confused with

Often appears alongside

Types and stages

Living with Alcohol Use Disorder

Complementary approaches

Patient support resources

Frequently asked

Sources & references

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