A member asked:

Blood alcohol test for my probation how far does the test go back.

3 doctors weighed in across 2 answers

Depends: Blood alcohol test can go back 48/72 hours depending on the type of test.

Answered 3/31/2017

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Dr. Paul Grin answered

Specializes in Pain Management

Aprox. 2 days: Alcohol has an approximate detection time of 12-24 hours in urine. People who achieve a moderate level of intoxication (0.10% blood alcohol content - bac) are detectable about 8 hours after achieving that level. The interesting fact is that alcohol is absorbed into the blood relatively quickly and metabolized more slowly.

Answered 11/10/2016

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