Blood Alcohol

Why It Is Done

A test for blood alcohol level is done to:

• Check the amount of alcohol in the blood when a person is suspected of being legally drunk (intoxicated). Symptoms of alcohol intoxication include confusion, lack of coordination, unsteadiness that makes it hard to stand or walk, or erratic or unsafe driving.
• Find the cause of altered mental status, such as unclear thinking, confusion, or coma.
• Check to see whether alcohol is present in the blood at times when the consumption of alcohol is prohibited. For example, in underage people suspected of drinking or in people enrolled in an alcohol treatment program.

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Author:	Jeannette Curtis	Last Updated: May 9, 2008
Medical Review:	Kathleen Romito, MD - Family Medicine R. Steven Tharratt, MD, MPVM, FACP, FCCP - Pulmonology, Critical Care, Medical Toxicology
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