Alcohol Blackouts: What Happens When You Can’t Remember?
Have you ever woken up after a night of drinking and realized you couldn’t remember everything that happened?
I have.
And there’s something particularly unsettling about knowing you were somewhere, talking to people, participating in conversations, and possibly making decisions, but having absolutely no memory of it.
Where did those hours go?
Did I really do the things people say I did?
How could I have been awake and functioning but remember nothing?
I wanted to understand what actually happens during an alcohol blackout.
What I discovered surprised me.
A Blackout Doesn’t Mean You Passed Out
This was my first revelation.
I always associated blacking out with losing consciousness.
But according to the National Institute on Alcohol Abuse and Alcoholism (NIAAA), an alcohol-induced blackout is different from passing out.
During a blackout, a person can remain conscious.
They may talk, walk, socialize, and interact with other people.
But their brain isn’t properly forming lasting memories of what’s happening.
Think about that.
You can be participating in your own life without creating memories of it.
That’s frightening.
What Happens Inside the Brain?
The explanation involves a part of the brain called the hippocampus.
The hippocampus plays an important role in forming new memories.
When someone consumes enough alcohol, it can interfere with the process that transfers short-term memories into long-term storage.
Scientists call this memory consolidation.
In other words, the problem isn’t necessarily that you’ve forgotten something that was once stored.
In a severe blackout, the memory may never have been properly formed in the first place.
That’s why someone can tell you exactly what happened the previous night, and you still can’t remember it.
The information may simply not be there to retrieve.
Are All Blackouts the Same?
Apparently not.
Researchers describe two main types.
Fragmentary blackouts involve incomplete memories. You might remember arriving at a party, talking to someone, and dancing, but have gaps in between.
Sometimes reminders from other people can help bring back portions of those memories.
En bloc blackouts are more severe.
With these, someone may have no memory of an extended period, sometimes several hours.
Those memories generally cannot be recovered because they were never properly stored.
I find that distinction fascinating.
And disturbing.
Why Do Blackouts Happen?
Here’s something important I learned.
It’s not simply the total number of drinks someone consumes.
How quickly they drink matters, too.
According to NIAAA, blackouts are especially likely when blood alcohol concentration rises rapidly.
That can happen when someone drinks large quantities in a short period or drinks on an empty stomach.
Women can also reach higher blood alcohol concentrations than men after consuming equivalent amounts of alcohol, partly because of differences in body composition.
This caught my attention because I’ve described how quickly I can drink when I’m out socializing.
While my friends are still enjoying their first cocktail, I may already be thinking about another.
The speed of drinking isn’t just a social habit. It can have serious consequences.
But I Seemed Perfectly Fine!
Here’s what I find especially troubling.
Someone experiencing a blackout may not look the way we imagine a person with severe memory impairment should look.
They may be talking and moving around.
That doesn’t mean they’re functioning normally.
Alcohol also impairs judgment, attention, coordination, and decision-making.
So a person can appear to be participating in an evening while being far less capable of making safe decisions than they realize.
And afterward, they may remember none of it.
Why Blackouts Are Dangerous
I think it’s easy to dismiss a blackout when you’re young.
Maybe your friends laugh about what happened.
Someone tells you a funny story about something you said.
You laugh along, even though you don’t remember a thing.
But blackouts aren’t harmless party stories.
NIAAA explains that alcohol-related blackouts are associated with increased risks of injuries and other serious consequences.
A person who cannot remember what happened may have been exposed to situations they would never have chosen while sober.
Falls, accidents, unsafe decisions, and alcohol poisoning are all concerns when someone drinks heavily.
And the fact that someone has experienced blackouts before doesn’t make the next one any safer.
Does Having a Blackout Mean You’re an Alcoholic?
Not necessarily.
According to NIAAA, experiencing a blackout doesn’t automatically mean someone has alcohol use disorder.
But even one blackout is a reason for concern.
I think that’s an important distinction.
For years, I didn’t think I had a drinking problem because I could go long periods without drinking.
I wasn’t drinking every day.
I wasn’t craving alcohol at home.
But I was overlooking what happened when I did drink.
And those experiences deserve attention, regardless of how frequently they occur.
What Am I Learning?
I used to think of a night out as an opportunity to have fun, laugh, dance, and enjoy my friends.
And that’s still what I want.
But I also want to remember it.
I want to remember the conversations, the laughter, the people I met, and the experiences I had.
What’s the point of having a wonderful evening if I can’t remember half of it?
Worse yet, what’s the point if I wake up wondering whether I embarrassed myself, injured myself, or put myself in danger?
I don’t want someone else to have to tell me the story of my own night.
I want to be there for it. All of it.
Recognize the Pattern. Change the Outcome.