1 doctor weighed in:

What causes blackout after drinking alcohol?

1 doctor weighed in
Dr. Victor Bonuel
Internal Medicine

In brief: It's theorized that

Alcohol consumption impairs the transmission of neurotransmitters in the hippocampus of the brain especially gaba/ gamma amino-butyric acid and n methyl d aspartate, thus causing the black out.
Bottoms up! http://en.M.Wikipedia.Org/wiki/blackout_(alcohol-related_amnesia).

In brief: It's theorized that

Alcohol consumption impairs the transmission of neurotransmitters in the hippocampus of the brain especially gaba/ gamma amino-butyric acid and n methyl d aspartate, thus causing the black out.
Bottoms up! http://en.M.Wikipedia.Org/wiki/blackout_(alcohol-related_amnesia).
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