Anxiety and Alcohol Use — NZ Condition Guide | KiwiMeds

What is Anxiety and Alcohol Use?

Alcohol is the most commonly used drug in New Zealand, and harmful alcohol use is a significant public health problem. Alcohol use disorder (AUD) — previously called alcohol dependence or alcoholism — is a pattern of alcohol use involving problems controlling drinking, preoccupation with alcohol, and continued use despite consequences.

Overview

Alcohol use exists on a spectrum from low-risk drinking to harmful drinking to alcohol dependence. Signs of harmful drinking include drinking more than intended, failed attempts to cut down, spending a lot of time drinking or recovering, craving alcohol, neglecting responsibilities, continuing despite harm to relationships or health, and tolerance (needing more to achieve the same effect) and withdrawal symptoms (shaking, sweating, anxiety when not drinking). Withdrawal from alcohol can be life-threatening — medical supervision is needed when stopping heavy drinking.

Treatment in New Zealand

Treatment for AUD includes brief intervention (from a GP), motivational interviewing, psychosocial support, and medications. Pharmac funds naltrexone (reduces cravings) and disulfiram (causes unpleasant reaction if alcohol is consumed) for AUD. Acamprosate is another option. Detoxification (withdrawal management) — using diazepam under medical supervision — is needed for dependent drinkers. Alcohol and Drug Helpline (0800 787 797) is free and available 24/7.

NZ-Specific Information

The NZ Ministry of Health recommends no more than 10 standard drinks per week for women and 15 for men, with no more than 4 on any single occasion. The Alcohol and Drug Helpline (0800 787 797), CADS (Community Alcohol and Drugs Services), and AA (Alcoholics Anonymous) provide support. Many NZ GPs use AUDIT-C screening for harmful alcohol use.

Frequently Asked Questions

Is alcoholism a disease? Yes — AUD is a chronic brain disorder with genetic, environmental, and developmental components. It is not a moral failing. Can I cut down gradually rather than stop completely? Controlled drinking may be possible for hazardous or harmful drinkers. For those with dependence, abstinence is usually recommended due to the difficulty of sustained moderate drinking.

Supplements That May Support Management

⚠️ Important: The supplements listed below have varying levels of clinical evidence. They are not a substitute for prescribed medications and should only be considered as adjunctive support under the guidance of a qualified healthcare professional. Always inform your GP or pharmacist before commencing any supplement, as interactions with prescribed medicines are possible.

• Thiamine (Vitamin B1) — Thiamine deficiency is a near-universal complication of alcohol use disorder and causes Wernicke’s encephalopathy — a neurological emergency. High-dose thiamine supplementation (100–300 mg/day orally, or IV in medical settings) is essential for anyone with alcohol use disorder. This is a medical priority, not a general supplement recommendation.
• B Vitamins (full complex: B1, B2, B3, B6, B12, Folate) — Chronic alcohol use depletes multiple B vitamins through reduced dietary intake, impaired absorption, and increased metabolism. A comprehensive B vitamin complex is foundational to nutritional support in alcohol use disorder.
• Magnesium — Magnesium deficiency is very common in alcohol use disorder, contributing to seizure risk, anxiety, and cardiovascular complications. Supplementation under medical supervision is important.
• Zinc — Zinc deficiency is prevalent in alcohol use disorder, contributing to immune dysfunction, wound healing impairment, and cognitive effects. Supplementation at 30–50 mg/day is appropriate.
• N-Acetylcysteine (NAC) — NAC replenishes glutathione (the liver’s primary antioxidant), reducing alcohol-related hepatic oxidative damage. It also reduces alcohol craving in emerging trial evidence, via glutamate pathway modulation.

Relevant Vaccinations

Individuals living with anxiety and alcohol use disorder may benefit from the following vaccinations. Please discuss your vaccination status with your GP or practice nurse, as eligibility and funding through the New Zealand National Immunisation Schedule may apply.

• Influenza (annual) — Alcohol use disorder impairs immune function. Annual influenza vaccination is strongly recommended.
• Pneumococcal — Alcohol-related immune suppression and aspiration pneumonia risk significantly increase susceptibility to pneumococcal disease. Pneumococcal vaccination is strongly recommended.
• Hepatitis B — Alcohol use disorder is associated with high-risk behaviours increasing hepatitis B exposure. Vaccination is strongly recommended for those who are not immune. Hepatitis B with alcohol is synergistically hepatotoxic.
• Hepatitis A — Hepatitis A vaccination is recommended given the risk of hepatitis A in social contexts associated with alcohol use and the severe outcomes when hepatitis A occurs in those with alcohol-related liver disease.
• COVID-19 — Alcohol use disorder is a significant COVID-19 risk factor. Maintaining vaccination is recommended.

Dietary Guidance

Evidence-based dietary modifications play a meaningful role in the management of anxiety and alcohol use disorder. The following foods are generally recommended as part of a balanced, condition-appropriate diet. A referral to a registered dietitian may be beneficial for personalised nutritional planning.

• Thiamine-fortified foods (cereals, bread) — In New Zealand, thiamine fortification of some foods is mandated. Ensuring consumption of fortified foods supports B1 repletion, which is critical for neurological protection.
• Nutrient-dense whole foods to address deficiencies — Rebuilding nutritional status through a balanced diet rich in lean protein, vegetables, whole grains, and diverse nutrients is essential in recovery.
• Liver-supportive foods (coffee, cruciferous vegetables) — Regular coffee consumption reduces liver fibrosis progression. Cruciferous vegetables support hepatic detoxification. These are supportive adjuncts alongside abstinence.
• Adequate protein intake — Alcohol-related malnutrition commonly includes protein-energy malnutrition. Adequate protein intake (1.2–1.5 g/kg/day) supports liver regeneration and muscle mass restoration.
• Complete alcohol abstinence — This is the single most important dietary intervention in alcohol use disorder. Even moderate reduction meaningfully reduces disease progression. Medically supervised detoxification is required for safe withdrawal in dependent individuals.

Related Conditions & Medications

Related conditions: Depression, Anxiety, Liver Disease.