how long does it take for blood alcohol test to come back
Get help from a doctor now âº. Do not drink: Blood alcohol levels will not be abnormal at 24 hours after a drink. However there are other tests that can detect alcohol intake up to 80 hours earlier. It would depend on what test is being done.Some tests are positive for two weeks after the drink in a chronic drinker.See this site for info. http://pubs.niaaa.nih.gov/publications/arh28-1/30-37.pdf ...Read more.et help from a doctor now âº. Do not drink: Blood alcohol levels will not be abnormal at 24 hours after a drink. However there are other tests that can detect alcohol intake up to 80 hours earlier. It would depend on what test is being done.