When a person drinks an alcoholic
beverage, most of the alcohol is absorbed in the stomach and small
intestine. After absorption, the alcohol enters the bloodstream. In a
similar mechanism, when a person ingests drugs
by mouth, they are digested and the components enter the bloodstream.
The blood carries
the alcohol throughout the body. Once absorbed into the body
tissues, the blood alcohol level exerts its effects on the
body. The observed effects depend directly on the blood
alcohol content (BAC), which is related to the amount
of alcohol consumed. The BAC can rise significantly within
20 minutes after having a drink.