What is a Blackout?

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Blackouts represent episodes of amnesia where a person is unable to remember all or parts of the time when they were drinking.
Blackouts are commonly associated with the consumption of large amounts of alcohol and rapid increases in blood alcohol concentration (BAC).  Individuals suffering from a Blackout may still be able to participate in social conversations and may appear to be functioning “normally” but may not remember parts or all of the evening. Basically, the individual suffering from a Blackout is unable to create new memories of the events they’re participating in. Blackouts may increase the number of alcohol-related injuries or death.
Blackouts are not the same as "Passing out" which involves a loss of consciousness.