Alcohol

Alcohol testing helps answer two different questions: “Is alcohol present now?” and “Has alcohol been used recently or repeatedly?” A proactive plan matches the test window to your testing goal. For immediate status, blood alcohol concentration (BAC) reflects current impairment. For recent use after the alcohol itself is gone, urine EtG/EtS detects metabolites. To evaluate repeat or heavy drinkingPEth (phosphatidylethanol) in blood and CDT (carbohydrate-deficient transferrin) can show patterns over weeks. Liver-related markers (e.g., GGTAST/ALTMCV) provide supportive context but are not specific to alcohol alone.

Lab testing can document abstinence, support workplace or program requirements, or add clinical context to a health evaluation. Results cannot determine why alcohol was used, assign legal responsibility, or replace a clinician’s assessment. Always review results with a qualified professional and follow applicable policies.

Signs, Symptoms & Related Situations

  • Safety/fitness for duty: odor of alcohol, slurred speech, impaired coordination, recent incident at work.

  • Clinical concerns: liver enzyme elevations, pancreatitis history, hypertension, sleep disturbance, depression or anxiety.

  • Monitoring/abstinence programs: treatment progress, pre-op requirements, return-to-duty, custody/compliance needs.

  • When to seek urgent care: confusion, vomiting, slow or irregular breathing, bluish skin—possible alcohol poisoning.
    All findings should be evaluated by a qualified clinician or program administrator.

Why These Tests Matter

What testing can do

  • Verify current alcohol presence (BAC) or recent use (EtG/EtS).

  • Detect ongoing or heavy use over longer windows (PEth, CDT).

  • Provide objective trends alongside clinical evaluation and program policies.

What testing cannot do

  • Prove intoxication-related behavior beyond the scope of the test.

  • Identify exact amounts or timing with precision—results reflect detection windows, not exact doses.

  • Replace legal, workplace, or clinical judgment.

What These Tests Measure (at a glance)

  • Blood Alcohol Concentration (BAC): measures ethanol in blood now (hours window). Best for: current impairment/fitness. Caveat: rapid change; timing is critical.

  • Urine Ethanol: detects alcohol for only hours after use. Best for: very recent consumption. Caveat: short window; easily missed.

  • Urine EtG/EtS (ethyl glucuronide/sulfate): metabolites detect use after alcohol has cleared (~24–72 hours, longer with heavy use). Best for: recent drinking or abstinence check. Caveat: non-beverage exposures (some mouthwashes, sanitizers) can cause low positives; labs use cutoffs.

  • PEth (phosphatidylethanol), whole blood: direct biomarker formed only in the presence of ethanol; reflects repeated or significant drinking over ~2–4 weeksBest for: monitoring patterns/relapse. Caveat: not a same-day impairment test.

  • CDT (carbohydrate-deficient transferrin): increases with sustained heavy drinking (weeks). Best for: pattern monitoring. Caveat: affected by some liver diseases and rare genetic variants.

  • GGT, AST/ALT, MCV (indirect markers): liver enzymes and red cell size that can rise with heavy use. Best for:clinical context. Caveat: not specific—many conditions can alter them.

  • Hair/Nail EtG (where available): indicates longer-term exposure (weeks–months). Best for: extended window overview. Caveat: environmental and cosmetic factors can influence results.

How the Testing Process Works

  1. Define the goal and window: “now” (BAC), “recent use” (EtG/EtS), or “pattern over weeks” (PEth/CDT).

  2. Prepare & collect: follow specimen directions (blood, urine, hair/nail if ordered); some programs require observed collection and chain-of-custody.

  3. Laboratory analysis: screening with confirmatory methods (e.g., LC-MS/MS) per test.

  4. Results & next steps: access results securely and review with your clinician or program.

  5. Monitor trends: repeat at set intervals to document abstinence or verify change.

Interpreting Results (General Guidance)

  • BAC positive: indicates alcohol in blood at the time of draw; levels decline with time.

  • EtG/EtS positive: suggests recent alcohol exposure within the detection window; consider cutoff, timing, and incidental exposures.

  • PEth or CDT elevated: supports repeated/heavy drinking over prior weeks; use serial testing for trends.

  • Liver markers elevated: provide context but are not alcohol-specific—review other causes.
    Always interpret within policy and clinical context; one result rarely tells the whole story.

Choosing Panels vs. Individual Tests

  • Immediate status (fitness/incident): BAC (blood) ± urine ethanol.

  • Recent use / abstinence check: urine EtG/EtS with appropriate cutoff.

  • Pattern/relapse monitoring: PEth (preferred) and/or CDT, plus supportive liver markers (GGT, AST/ALT, MCV).

  • Extended window: consider hair/nail EtG where available and program-appropriate.

  • Clinical context: add liver panel and CBC to assess organ health.

FAQs

Which test proves current intoxication?
BAC best reflects current alcohol in the bloodstream; it changes quickly with time.

How long does EtG/EtS detect alcohol?
Typically 1–3 days after use (longer with heavy drinking), even when BAC is zero.

What is PEth and why use it?
PEth forms only when alcohol is present; it reflects repeated or significant drinking over ~2–4 weeks, making it useful for monitoring.

Can mouthwash cause a positive?
Incidental exposures may trigger low EtG results. Programs use cutoffs and confirmatory testing to reduce false positives.

Are liver tests enough to prove alcohol use?
No. GGT, AST/ALT, and MCV are indirect and affected by many conditions; they are supportive, not definitive.

How do I choose the right test?
Match the window to the goal: BAC (now), EtG/EtS (recent), PEth/CDT (pattern). Ask your clinician or program which fits your needs.

Internal Links & Cross-References

  • Drug & Alcohol Tests Hub

  • Drug Screening

  • Nicotine & Tobacco

  • Liver Health

  • Employment & Compliance Testing

  • Key Blood Tests: Blood Alcohol (BAC) • Urine EtG/EtS • PEth (Phosphatidylethanol) • CDT • GGT • AST/ALT • MCV • Hair/Nail EtG

References

  1. Substance Abuse and Mental Health Services Administration (SAMHSA). Alcohol testing considerations and cutoffs.

  2. Centers for Disease Control and Prevention (CDC). Alcohol and public health—screening and brief intervention.

  3. American Association for Clinical Chemistry (AACC). Guidance on EtG/EtS, PEth, and CDT interpretation.

  4. College of American Pathologists (CAP). Laboratory detection of alcohol use—best practices.

  5. World Health Organization (WHO). Alcohol and health—biomarkers and screening tools.

  6. American Association for the Study of Liver Diseases (AASLD). Evaluation of alcohol-associated liver disease and laboratory markers.

  7. ARUP Consult/clinical toxicology compendia. PEth and CDT clinical use and limitations.

Available Tests & Panels

Your alcohol testing menu is pre-populated in the Ulta Lab Tests system. Use filters by goal and window: choose BACfor immediate status, EtG/EtS for recent use, and PEth/CDT for patterns, with liver markers for clinical context. Review all results with your clinician or program administrator.

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Most Popular

The GGT Test measures gamma-glutamyl transferase, an enzyme found in the liver and bile ducts, to evaluate liver health. Elevated GGT may indicate liver disease, bile duct obstruction, alcohol use, or medication side effects. Doctors order this test to investigate symptoms like fatigue, jaundice, dark urine, or abdominal pain and to monitor liver damage. It is often performed with other liver tests to provide a complete picture of liver and bile duct function.

Blood
Blood Draw
Also Known As: Gamma Glutamyl Transferase Test, Gamma Glutamyl TransPeptidase Test, GGTP Test, GTP Test

The Complete Blood Count with Differential and Platelets Test is a comprehensive blood test that checks red blood cells, white blood cells, hemoglobin, hematocrit, and platelets. The differential analyzes types of white blood cells to detect infections, anemia, clotting abnormalities, immune conditions, and certain cancers. This essential test is often ordered for routine health exams, diagnosis, and monitoring treatment progress.

Blood
Blood Draw
Also Known As: CBC Test, CBC with Differential and Platelets Test, CBC w/Diff and Platelets Test, Full Blood Count Test, Complete Blood Count Test

The Comprehensive Metabolic Panel (CMP) Test measures 21 markers to assess metabolic health, liver and kidney function, and electrolyte balance. It includes glucose, calcium, sodium, potassium, chloride, CO2, albumin, globulin, A/G ratio, total protein, bilirubin, ALP, AST, ALT, BUN, creatinine, BUN/creatinine ratio, and eGFR. The CMP helps detect diabetes, liver or kidney disease, and supports routine screening and chronic condition monitoring.

Blood
Blood Draw
Also Known As: CMP Test, Chemistry Panel Test, Chem Test, Chem 21 Test, Chem 14 Test 

The Carbohydrate-deficient Transferrin Test measures abnormal transferrin isoforms in the blood, which can indicate chronic alcohol consumption or alcohol use disorder. By detecting elevated CDT levels, the test helps assess patterns of heavy drinking and monitor abstinence or relapse. Clinicians may also use results to support evaluation of liver function and alcohol-related health risks, providing valuable insight into long-term alcohol exposure.

Blood
Blood Draw
Also Known As: Alcohol Use Test

Most Popular

The Magnesium Serum Test measures magnesium levels in blood to evaluate electrolyte balance, nerve and muscle function, and overall metabolic health. Abnormal levels may indicate kidney disease, malnutrition, gastrointestinal disorders, or uncontrolled diabetes. Low magnesium can cause weakness, cramps, or irregular heartbeat, while high levels may signal kidney dysfunction. Doctors use this test to diagnose deficiencies, monitor therapy, or assess chronic health conditions.

Blood
Blood Draw
Also Known As: Mg Test, Mag Test

The Acetone Blood Test measures acetone, a type of ketone produced during fat metabolism. Elevated levels may indicate diabetic ketoacidosis, uncontrolled diabetes, starvation, or metabolic disorders. This test supports evaluation of unexplained acidosis, altered mental status, or symptoms such as nausea and rapid breathing, providing insight into metabolic balance and monitoring of critical illness or diabetes management.

Blood
Blood Draw

The Ethyl Alcohol Blood Test detects ethanol in blood to provide an accurate measure of alcohol exposure. Abnormal levels may reflect acute intoxication, metabolic disturbance, or systemic impairment. This test helps assess liver metabolism, cardiovascular strain, and neurological effects, offering insight into how alcohol impacts body systems, organ health, and overall physiological balance.

Blood
Blood Draw
Also Known As: Blood Alcohol Concentration Test, BAC Test

The Cardio IQ™ HDL Cholesterol Test evaluates levels of high-density lipoprotein cholesterol, the “good” cholesterol that plays a critical role in heart health. Adequate HDL supports the removal of excess cholesterol from the bloodstream, reducing plaque buildup in arteries. This test provides valuable insight into cardiovascular wellness, lipid balance, and overall risk of heart disease when combined with other lipid panel results.

Blood
Blood Draw

The HDL Cholesterol Test measures high-density lipoprotein cholesterol, often called “good” cholesterol, which helps remove excess cholesterol from the bloodstream. Higher HDL levels are linked to a lower risk of heart disease, while low levels may increase cardiovascular risk. Doctors use this blood test as part of a lipid panel to assess heart health, evaluate risk factors, and guide lifestyle or treatment strategies for cardiovascular disease prevention.

Blood
Blood Draw
Also Known As: Good Cholesterol Test

The Metanephrines Fractionated Free Plasma Test measures free metanephrine and normetanephrine levels to evaluate adrenal gland function and catecholamine metabolism. Elevated concentrations may indicate pheochromocytoma, paraganglioma, or other endocrine tumors. Providers use this test to investigate unexplained hypertension, palpitations, headaches, or symptoms linked to excess catecholamine production.

Blood
Blood Draw

The Alcohol Urine Drug Test quantitatively measures ethyl glucuronide (EtG) and ethyl sulfate (EtS) levels in urine to assess recent alcohol intake. This precise quantitative analysis enables clinicians and monitoring programs to track consumption patterns over time, distinguish between trace exposure and significant use, and support reliable alcohol monitoring in clinical, treatment, or legal settings.

Urine
Urine Collection
Also Known As: Drug Monitoring Alcohol Metabolite Quantitative Urine Test

The Panel 6 Urine Drug Screen with Confirmation detects multiple commonly abused drugs in urine via immunoassay screening and then validates positive findings with confirmatory testing. This two-step method enhances result reliability by reducing false positives, providing a trustworthy overview of substance exposure suited for clinical, monitoring, or workplace settings.

Urine
Urine Collection
Also Known As: Drug Monitoring Panel 6 Screen with Confirmation Urine

The Alcohol Urine Drug Screen with Confirmation detects and confirms the presence of ethyl glucuronide (EtG), a direct metabolite of alcohol, in urine samples. This test is designed to identify recent alcohol use and verify initial screening results with confirmatory analysis, providing reliable and accurate information for monitoring purposes in clinical, legal, and treatment settings.

Urine
Urine Collection
Also Known As: Drug Monitoring Alcohol Metabolite Screen with Confirmation Urine

The Panel 7 Urine Drug Screen with Confirmation detects multiple commonly abused drugs in urine via immunoassay screening and then validates positive results through confirmatory testing. This two-step approach increases specificity by reducing false positives, providing dependable insight into exposure to an extended panel of substances in clinical, monitoring, or workplace settings.

Urine
Urine Collection
Also Known As: Drug Monitoring Panel 7 Screen with Confirmation Urine

The Panel 8 Urine Drug Screen with Confirmation detects multiple commonly abused drugs in urine through immunoassay screening and validates positive results using confirmatory analysis. This two-step method enhances specificity and reduces false positives, providing reliable insight into substance exposure across a broader panel of substances in clinical, workplace, and monitoring environments.

Urine
Urine Collection
Also Known As: Drug Monitoring Panel 8 Screen with Confirmation Urine

Alcoholism: What Is It?

There is a wide range of problems associated with alcohol use – from problem drinking on an occasional basis to misuse of alcohol, and ultimately to alcoholism. Alcohol dependence, which is also called alcoholism, is often progressive and fatal. It is a primary, chronic disease that is influenced by genetic, environmental, and psychosocial factors.

Risky drinking is defined by the National Institute on Alcohol Abuse and Alcoholism (or NIAAA). Consuming four or more drinks each day or fourteen or more drinks a week is listed as risky for men. For women, it is considered risky to consume three or more alcoholic beverages each day or seven or more each week. The NIAAA’s definition of “standard drinks” equals roughly 1.5 ounces of hard liquor, 5 ounces of wine, or 12 ounces of typical American beer. These figures are based on mass-market beer and wine. Beers contain varying amounts of alcohol with certain ones containing nearly twice the amount as typical mass-market beer. When it comes to wine, there is more consistency with alcohol content. However, wine coolers usually contain lower amounts of alcohol, while certain wines, like port and zinfandels, can contain about twice the alcohol.

By definition, it is necessary to consume alcohol to develop alcoholism. However, it is not using alcohol itself that predicts alcoholism development. Developing alcoholism doesn’t follow a formula – people are different, and so are the quantities, frequencies, and regularities of alcohol consumption required to develop alcoholism. Additionally, how a person responds to alcohol will vary based on their general health, age, size, and any medications they may be taking. For some people, a fewer amount of drinks can adversely affect their health.

Pregnant women, and those planning to be, are advised by the Surgeon General to abstain from consuming alcohol altogether since there is no known safe level for expecting mothers.

Signs and Symptoms of Alcoholism

The NIAAA lists the following signs and symptoms associated with alcoholism:

  • Tolerance: a need to drink more than usual to obtain the same experience alcohol provided initially
  • Physical dependence: withdrawal symptoms, for example, shakiness, anxiety, sweating, and nausea once drinking has stopped
  • Craving: a feeling that is a strong urge to drink
  • Loss of control: the sense that one is not able to stop drinking after they have started drinking

The United States Centers for Disease Control and Prevention (or CDC) classifies alcohol misuse as a pattern of drinking which causes certain problematic situations, including the inability to complete significant work, home, or school responsibilities, or recurring legal problems involving alcohol (like DUI or public intoxication arrests).

The National Survey on Drug Use and Health states that there are nearly 15 million adults in America that are dependent on alcohol or misuse it. Additionally, almost 20 percent of U.S. patients share with their primary healthcare providers that their drinking behaviors are hazardous or risky. The NIAAA reports that less than ten percent of those with an alcohol use disorder get the treatment they need.

Alcoholism and Long-Term Health Risks

The CDC shares the following social and medical problems that can be developed with long-term excessive alcohol use: 

  • Psychiatric conditions, a wide range of issues, such as anxiety, depression, and suicide
  • Neurological conditions that may include neuropathy or stroke, dementia, or diseased peripheral nerves
  • Cardiovascular problems, including irregular heartbeat, high blood pressure, and weakened and enlarged heart
  • Cancers, including breast, colon, liver, throat, mouth, and esophagus
  • Gastrointestinal diseases, such as gastritis and pancreatitis
  • Liver diseases, such as cirrhosis (scarring) and alcoholic hepatitis (inflammation)

For those with hepatitis C virus (HCV) and excess alcohol use, the liver function is reduced, and alcohol can interfere with HCV medications; also HCV, along with other liver diseases, plus alcohol equals increased likelihood of developing cirrhosis and causing death.

Typically, women are more sensitive to alcohol’s effects and, even though they may consume less alcohol than men, may be more likely to develop alcohol-related health problems sooner than men. Alcohol use during pregnancy can lead to low birth weight, premature birth, stillbirth, miscarriage, and other issues for the baby, including malformation of the brain, heart, and other organs, abnormal facial features, hearing and vision problems, and growth deficits. Additionally, the March of Dimes discloses that a child’s brain damage from their mother’s alcohol use during pregnancy can result in learning disabilities, speech and language delays, and behavioral problems.

Tests for Alcoholism

Clinical screening surveys are the primary tests used to diagnose alcohol dependence or misuse. There are several hundred surveys out there that can be used. The ones that are most common and have scientifically-validated questions include the Alcohol Use Disorders Identification Test (AUDIT), the Michigan Alcohol Screening Test (MAST), a Brief MAST which is a shorter version of the MAST, and a short, quick survey called the CAGE questionnaire. The surveys ask different questions regarding the ability to stop drinking, frequency of drinking, and what problems result from drinking.

There are currently no laboratory testing options to identify alcoholism. However, there are tests that can help detect issues that can arise from drinking, including organ damage. The Substance Abuse and Mental Health Administration share the following testing options that may be used:

Gamma-glutamyl transferase (GGT) is a liver enzyme that is increased by different conditions that affect the liver, including heavy alcohol use.

Mean corpuscular volume (MCV) is a test that measures red blood cell size and is usually done in conjunction with a complete blood count (CBC) test. For heavy drinkers, MCV can increase over time; however, many other conditions can affect it.

Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are enzymes that can signal liver damage that is often related to heavy alcohol use.

Carbohydrate-deficient transferrin (CDT) is a test that can indicate a heavy drinking relapse after abstinence. However, the tests can be less sensitive for younger people and women.

Ethyl glucuronide (EtG) and Ethyl sulfate (EtS) are biomarkers and direct analytes of alcohol breakdown – commonly a urine test.

Phosphatidyl ethanol (PEth) is a marker that is typically measured in blood. Normally, it is used to indicate moderate to heavy drinking.

Other tests include:

Comprehensive metabolic panel (CMP) or liver panel is a group of tests that evaluate liver and organ function.

Magnesium is commonly low in those who use alcohol because of inadequate diet and magnesium loss by the kidneys.

A blood alcohol level (ethanol test) is a test that can determine if a person had recent alcohol use. However, it does not diagnose alcoholism.

Treatment for Alcoholism

Alcoholism, like many other chronic diseases, cannot be cured.  There are, however, effective treatments to help alcoholics stay sober, but they must acknowledge that they have an alcohol problem and the drive to quit drinking.  These treatments most often include group therapy, counseling, and alcohol education.

If a person decides to stop drinking alcohol, they can enter a treatment facility for a short period to rehabilitate.  These treatment centers are designed to counsel patients, give support, and help them get through their initial symptoms and safely withdraw from alcohol.

Sometimes, benzodiazepines (Valium or similar drugs) may be employed to help ease some of the symptoms of alcoholism.

The FDA has approved three oral medications to help people refrain from drinking alcohol – disulfiram, acamprosate, and naltrexone.  Typically, these are prescribed to patients who wish to stop drinking but need some help.  Naltrexone limits a person’s craving for alcohol but can cause severe withdrawal symptoms in people who are opiate dependent; naltrexone is also available in a long-acting, injectable form.  Disulfiram causes nausea, vomiting, and flushing when a person drinks any alcohol.  Acamprosate also works to reduce alcohol cravings.  All three are designed to be used in conjunction with counseling.

Just as there is no single test for screening or diagnosing alcohol dependence, there is no one therapy or medication that definitively treats alcoholism in all those who suffer from it.  Just like a lot of chronic diseases, alcoholism is not easy to resolve, and many alcoholics will relapse several times before achieving lasting sobriety.

While some alcohol-related liver and other organ damage may be resolvable, some damage may be permanent.  Patients should work long-term with their doctors to maintain sobriety and address any resultant complications.