Blackout Drunk: Signs, Causes, and Dangers of Blackout Drinking

   Jul. 18, 2025
   5 minute read
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Last Edited: July 18, 2025
Author
Patricia Howard, LMFT, CADC
Clinically Reviewed
Edward Jamison, MS, CAP, ICADC, LADC
All of the information on this page has been reviewed and certified by an addiction professional.

“I went to war with my mind, and I lost every time alcohol won.” – Russell Brand

Blacking out from drinking isn’t funny, cool, or harmless. It’s terrifying—and dangerous. Being blackout drunk means your brain stops forming new memories, even if your body is still moving, talking, or driving. You can say and do things you won’t remember the next day—or ever.

For many, blacking out is a sign that drinking has gone too far. It may even point to alcoholism, a serious medical condition that affects millions of people and ruins lives if left untreated.

According to the National Institute on Alcohol Abuse and Alcoholism (NIAAA), about 1 in 6 adults binge drink four times a month, often consuming 7+ drinks per session. These are the episodes where blackouts often occur. Yet many people still don’t understand how serious it is—or how to stop.

This article breaks down what it means to be blackout drunk, what causes it, and why it’s more dangerous than you think. We’ll also talk about how to find help, hope, and recovery before it’s too late.

What Does It Mean to Be Blackout Drunk?

When you’re blackout drunk, your brain stops storing new memories. This is caused by a spike in your blood alcohol level that shuts down the hippocampus—the part of the brain that forms short-term memories.

You might still be talking, laughing, or even walking home. But later, you won’t remember any of it. There are two main types of blackouts:

  • Fragmentary blackouts: You remember pieces, but not everything.
  • Complete blackouts: You remember nothing at all.

This isn’t the same as passing out, which is when you lose consciousness. In a blackout, you’re still awake—but your brain isn’t recording.

Signs You Were Blackout Drunk

You may not even realize you were blackout drunk until someone tells you what happened. That’s one of the scariest parts.

Common signs include:

  • Waking up with no memory of the night before
  • Friends saying you were acting strangely
  • Discovering missed texts, calls, or social media posts you don’t recall
  • Finding injuries, bruises, or damage you can’t explain
  • A hangover that feels especially brutal

If blackouts are happening more often—or after fewer drinks—it could signal growing alcohol dependence or a need for detox.

Causes of Blackout Drinking

1. Binge Drinking

Drinking a large amount in a short period causes a rapid rise in blood alcohol levels. This is the biggest cause of blackouts. The more you drink, and the faster you drink, the higher the risk.

2. Drinking on an Empty Stomach

Without food, alcohol hits your bloodstream faster. This makes blackouts more likely.

3. Mixing Substances

Mixing alcohol with medications or drugs (even over-the-counter ones) can increase blackout risk—and even cause alcohol poisoning.

4. Genetic or Brain Differences

Some people are more prone to blackouts, especially those with a family history of alcoholism or mental health disorders.

Dangers of Blackout Drinking

Blacking out isn’t just forgetting a few hours—it can lead to lifelong damage.

1. Accidents and Injuries

Falls, car crashes, violence, and risky behavior are common during blackouts. You may hurt yourself or others—and not even remember it.

2. Alcohol Poisoning

While blacked out, people often continue drinking, unaware of how much they’ve had. This can lead to alcohol poisoning, which can be fatal.

3. Legal or Financial Trouble

Many people make poor decisions while blackout drunk—like fighting, stealing, or unsafe sex—which can have serious consequences.

4. Long-Term Health Damage

Frequent blackouts are a red flag for alcoholic liver disease, brain damage, and memory loss.

Blackout Drinking and Alcoholism

If blackouts happen regularly, it’s a strong sign of alcohol use disorder. This condition can’t be fixed by just “drinking less” or “trying harder.”

Other signs of alcoholism include:

  • Drinking alone or in secret
  • Needing alcohol to relax or sleep
  • Getting irritable or shaky when you don’t drink
  • Losing control after starting to drink
  • Prioritizing alcohol over work, family, or health

If this sounds familiar, it’s time to look at your alcohol withdrawal timeline and consider treatment.

The Alcohol Withdrawal Timeline: What to Expect

If you’ve been drinking heavily, stopping suddenly can lead to withdrawal. Symptoms usually appear within 6–24 hours and may include:

  • Anxiety and irritability
  • Sweating and tremors
  • Nausea and vomiting
  • Insomnia
  • Seizures (in severe cases)

Because withdrawal can be dangerous, medical detox is often the safest first step.

Treatment Options: You’re Not Alone

1. Medical Detox

This helps you safely stop drinking under medical supervision. Doctors can manage symptoms and keep you stable.

2. Inpatient Rehab

In a supportive setting, you’ll get therapy, structure, and the tools you need to build a sober life. Inpatient rehab is especially helpful for those who’ve been blackout drunk or binge drinking frequently.

3. Ongoing Support

After rehab, ongoing care like therapy, support groups (like AA), and lifestyle changes can help you stay on track.

Hope After Blackouts

Here’s the truth: You’re not broken. You’re not beyond help.

People recover from alcoholism every day. They stop blacking out. They rebuild their lives. They heal relationships. They learn to live without needing a drink to function.

If you’ve been blackout drunk and feel ashamed, afraid, or unsure what to do next—know this: You don’t have to stay stuck.

You can start again. You can feel good in your own skin. You can wake up with a clear head and a full heart.

Take Back Control

Being blackout drunk isn’t a joke—it’s a serious sign your body and brain are in trouble. The risks are real, but so is recovery.

Whether you’ve blacked out once or dozens of times, you deserve help and healing. Don’t wait for the next mistake to be the one that changes everything.

Frequently Asked Questions
What does it mean to be blackout drunk?
Being blackout drunk means your brain has stopped forming new memories due to high levels of alcohol in your bloodstream. You may still be awake and functioning, but later you won’t remember what happened. Blackouts are a serious warning sign of potential alcoholism or dangerous binge drinking behavior.
How many drinks does it take to black out?
Blackouts typically happen when a person’s blood alcohol concentration (BAC) rises rapidly—often from binge drinking. For many people, this occurs after consuming 4–5 drinks in a short time. However, the exact number varies based on body weight, gender, food intake, and tolerance.
Is blacking out a sign of alcoholism?
Frequent blackouts are a strong indicator of alcohol use disorder (AUD). If you find yourself regularly forgetting what happened while drinking or if others tell you about behavior you don’t recall, it may be time to seek help for possible alcoholism or alcohol dependence.
Can blacking out cause permanent brain damage?
Yes, repeated blackouts from heavy drinking can cause long-term brain damage, including memory loss and cognitive decline. Over time, blackout drinking increases the risk of alcoholic liver disease, mental health issues, and even permanent changes in brain function.
What should I do if I black out when I drink?
If you’ve been blackout drunk—even once—it’s important to take it seriously. Consider cutting back or quitting alcohol entirely. If you have trouble stopping, seek medical detox, consider inpatient rehab, or talk to a professional about treatment options. Blackouts are not a normal or safe part of drinking.
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