Alcohol (Ethanol), Serum

What it is:
This test measures the concentration of ethanol (alcohol) in the blood serum. It is used to assess recent alcohol intake and its physiological effects.

Uses

• Detect and confirm alcohol intoxication

• Monitor individuals in cases of suspected poisoning or overdose

• Evaluate alcohol levels in emergency, trauma, or medicolegal cases

• Assist in diagnosis of alcohol use disorder or monitoring during detox programs

Symptoms That May Lead to the Test

• Slurred speech and unsteady movements

• Confusion, impaired coordination, or altered consciousness

• Nausea and vomiting

• Aggressive or risky behavior

• Coma or unresponsiveness in severe intoxication

Abnormal Results

• High serum ethanol levels:

  • Acute alcohol intoxication

  • Alcohol poisoning (potentially life-threatening at very high levels)

  • Impaired judgment, coordination, and consciousness

• Low/undetectable levels:

  • Normal finding if no recent alcohol intake

  • Useful in confirming abstinence during treatment or monitoring

Risks

• Minimal, limited to standard blood draw risks (mild pain, bruising, or dizziness).