What is the average elimination rate of alcohol from the body?

What is the average elimination rate of alcohol from the body?

• A. 0.010% per hour
• B. Approximately 0.015% per hour
• C. 0.020% per hour
• D. 0.025% per hour

Answer: (B)

Alcohol is removed from the bloodstream at a relatively constant rate by the liver, a pattern described as zero-order kinetics under typical conditions. The standard average elimination rate used in forensic contexts is about 0.015% BAC per hour. This means BAC declines roughly linearly over time; for example, starting at 0.08% BAC, it would take about 0.08 / 0.015 ≈ 5.3 hours to reach zero. Rates like 0.010% per hour would indicate slower metabolism, while 0.020% or 0.025% per hour would indicate faster metabolism; however, individual factors such as liver health or medications can cause variation, so 0.015% per hour is the commonly used reference.

Alcohol is removed from the bloodstream at a relatively constant rate by the liver, a pattern described as zero-order kinetics under typical conditions. The standard average elimination rate used in forensic contexts is about 0.015% BAC per hour. This means BAC declines roughly linearly over time; for example, starting at 0.08% BAC, it would take about 0.08 / 0.015 ≈ 5.3 hours to reach zero. Rates like 0.010% per hour would indicate slower metabolism, while 0.020% or 0.025% per hour would indicate faster metabolism; however, individual factors such as liver health or medications can cause variation, so 0.015% per hour is the commonly used reference.