Alcohol Use Disorder

Alcohol Use Disorder (AUD) is a chronic, relapsing pattern of alcohol use characterized by an inability to stop or control drinking despite adverse social, occupational, or health consequences. DSM-5 combined the previously separate categories of 'alcohol abuse' and 'alcohol dependence' into a single disorder existing on a spectrum of severity — mild, moderate, or severe — based on the number of diagnostic criteria met.

AUD is a problematic pattern of alcohol use leading to clinically significant impairment or distress, manifested by two or more of eleven criteria within a 12-month period — including drinking more or longer than intended, unsuccessful efforts to cut down, craving, failure to fulfill major role obligations, continued use despite social or interpersonal problems, tolerance, and withdrawal. Severity is specified as mild (2–3 criteria), moderate (4–5), or severe (6 or more).

AUD has a strong genetic component, with heritability estimated at 50–60% — among the more heritable substance use disorders. Alcohol increases dopamine release in the brain's reward circuit, producing reinforcement, while chronic use produces neuroadaptation in the GABA and glutamate systems, underlying tolerance and withdrawal. Psychosocial factors — family or peer alcohol use, trauma, chronic stress, cultural drinking norms, and co-occurring psychiatric conditions such as anxiety, depression, or PTSD — commonly contribute to and complicate the disorder.

• Family history of AUD (the single strongest risk factor)
• Early age of first alcohol use
• Co-occurring psychiatric conditions
• Chronic stress or trauma history
• A peer or social environment with heavy drinking norms
• Male sex, though the gap with women is narrowing
• Certain genetic variants affecting alcohol metabolism

Acute alcohol use increases GABA activity (producing sedation and anxiety relief) while inhibiting glutamate/NMDA receptors, and triggers dopamine release in the mesolimbic reward pathway. Chronic use leads to neuroadaptation — the brain reduces GABA sensitivity and upregulates glutamate receptors — which is why abrupt cessation in a dependent person can cause a dangerous glutamate-driven hyperexcitable state, including seizure risk and delirium tremens. The prefrontal cortex's control over drinking behavior becomes impaired, while stress-related brain systems become sensitized, driving craving during withdrawal and abstinence.

• Drinking more or for longer than intended
• Persistent desire or unsuccessful efforts to cut down
• Significant time spent obtaining, using, or recovering from alcohol
• Strong cravings
• Failure to fulfill major role obligations at work, school, or home
• Continued use despite social or relationship problems caused by drinking
• Giving up important activities in favor of drinking
• Recurrent use in physically hazardous situations
• Tolerance — needing more alcohol for the same effect
• Withdrawal symptoms (tremor, sweating, nausea, anxiety, and in severe cases seizures or delirium tremens) when not drinking

• Two or more of eleven specific criteria (impaired control, social impairment, risky use, tolerance, withdrawal) within a 12-month period
• Severity specified as mild (2–3 criteria), moderate (4–5), or severe (6+)

Conditions a psychiatrist will consider and rule out before confirming this diagnosis:

Social/moderate drinking

Without significant impairment or meeting the specific pattern of diagnostic criteria.

Other substance use disorders

Frequently co-occur and should be assessed alongside AUD.

Primary psychiatric disorders with secondary heavy drinking

Self-medicating anxiety or depression with alcohol — treatment of both conditions is usually needed regardless of which came first.

Medical conditions causing similar presentations

Liver disease from other causes should be distinguished where relevant.

• Clinical interview and detailed alcohol use history (quantity, frequency, pattern)
• AUDIT (Alcohol Use Disorders Identification Test) screening questionnaire
• Liver function tests (GGT, AST/ALT, with an AST:ALT ratio above 2 suggestive of alcohol-related liver injury)
• Mean corpuscular volume (MCV), often elevated with chronic heavy use
• Screening for co-occurring psychiatric conditions and other substance use
• Withdrawal risk assessment (CIWA-Ar scale) if cessation is being considered

Medically supervised detoxification is recommended for those with significant physical dependence, given seizure and delirium tremens risk, followed by psychosocial treatment and often medication to support abstinence and reduce relapse risk. Treatment is tailored to severity and the individual's goals.

Benzodiazepines

Used for safe, supervised acute withdrawal management, tapered to prevent seizures and delirium tremens.

Naltrexone

Reduces craving and the rewarding effects of alcohol.

Acamprosate

Helps maintain abstinence by normalizing glutamate system dysregulation.

Disulfiram

Causes an aversive reaction if alcohol is consumed, used as a deterrent for motivated patients.

Thiamine (vitamin B1)

Critical supplementation in heavy drinkers to prevent Wernicke's encephalopathy, a serious and preventable neurological complication.

Motivational Interviewing

Builds internal motivation for change, particularly useful early in treatment engagement.

Cognitive Behavioral Therapy

Addresses triggers, cravings, and relapse prevention skills.

12-step facilitation / mutual support groups

Alcoholics Anonymous and similar peer support programs.

Family therapy

Given the significant impact of AUD on family systems.

• Identify and avoid personal drinking triggers
• Build a sober support network
• Engage in alternative rewarding activities to replace drinking
• Address co-occurring sleep, anxiety, or depression symptoms, which can otherwise drive relapse
• Have a clear relapse plan recognizing early warning signs and a specific response

AUD is a chronic, relapsing condition similar to other chronic diseases, but meaningful, lasting recovery is achievable for many people with treatment. Relapse is common and should be understood as part of the recovery process for many, rather than a treatment failure. Untreated, AUD is associated with significant physical health complications and markedly increased mortality risk.

• Delaying age of first alcohol use
• Addressing family and community risk factors
• Screening and brief intervention in primary care for at-risk drinking before it progresses
• Treating co-occurring psychiatric conditions that can drive self-medication with alcohol
• Public health measures around alcohol availability and marketing

Understand AUD as a chronic medical condition, not a moral failing or simple lack of willpower. Avoid enabling behaviors — covering up consequences, providing alcohol, making excuses — which can inadvertently perpetuate the disorder. Support treatment engagement without excessive pressure or ultimatums, which can backfire, and consider support groups for family members, such as Al-Anon. Prioritize safety, particularly around withdrawal, which can be medically dangerous.

1. American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, 5th Edition, Text Revision (DSM-5-TR).
2. World Health Organization. Global Status Report on Alcohol.
3. National Institute on Alcohol Abuse and Alcoholism (NIAAA).