Ethanol concentration in serum (quantitative)

Why This Test Is Done

Your healthcare provider may order this test if you’ve been exposed to alcohol in high amounts (e.g., drinking too much in a short time), if you’re suspected of alcohol poisoning, or if you’re under observation for substance use. It can also be part of routine screening for certain conditions or before surgeries where alcohol use is a concern.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. The process is quick and typically done in a clinic or lab setting. If you’re fasting, follow your provider’s instructions.

What the Results Mean

Results are reported in milligrams per deciliter (mg/dL) or milliequivalents per liter (mEq/L). Higher levels may indicate recent alcohol ingestion, intoxication, or other medical conditions. Your provider will interpret the result based on your symptoms and medical history.

Common Causes of Abnormal Results

Elevated ethanol levels can result from recent alcohol consumption, alcohol poisoning, or conditions like diabetes or certain medications that affect alcohol metabolism. Low levels may suggest recent abstinence or medical treatments that reduce alcohol absorption.