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The dangers of getting blackout drunk

A missing stretch of memory after drinking is worth taking seriously, not hiding in shame.

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Created by Tim Francis, SUD and Mental Health Content Specialist

Updated

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Original article

During a blackout, you may remain awake yet later have gaps in recall because memories were not consolidated. Learn about broader drinking risks for women or explore alcohol addiction treatment for women if blackouts concern you.

Excessive alcohol use comes with several serious risks, including alcoholism and serious, non-addicted alcohol abuse. They also include the possibility of developing alcohol poisoning. In addition, you may drink enough to become blackout drunk. An alcohol blackout can endanger your health in multiple ways. You can black out even if you’re not affected by diagnosable drinking problems. However, you may need alcohol addiction treatment to reduce your exposure to this serious health issue.

What Happens to a Person Who Is Blackout Drunk?

An alcohol blackout is a gap in your memory triggered by high levels of alcohol in your bloodstream. Most people are at-risk for a blackout when their blood alcohol concentration, or BAC, reaches or exceeds 0.16%. This BAC level is twice the threshold for legal drunkenness in the U.S.

How can extreme drunkenness cause you to black out? The root of the issue is alcohol’s effects on an area of your brain called the hippocampus. This area plays a central role in your ability to turn short-term memories into long-term memories. Extreme intoxication can temporarily prevent the hippocampus from doing its job. As a result, you experience gaps in your memory that correspond to the time you were intoxicated.

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Compared to men, women are more susceptible to the effects of alcohol. This effect is true, in part, because the average woman has less body mass than the average man. However, the way in which women process alcohol is also a factor. Together, these differences help explain why women tend to be at higher risk for alcohol blackouts.

Blackout Drunk Symptoms

On the surface, an alcohol blackout may sound similar to the act of passing out while drinking. However, there are clear differences between these two drinking-related events. When you pass out, you either fall asleep or lose consciousness.

In stark contrast, you don’t do either of these things while blackout drunk. You remain awake and active. But despite this fact, your brain stops forming new memories. Blackout drunk symptoms may either partially or completely disrupt your memory. After a partial blackout, you will recall pieces or fragments of what happened to you while drunk. But after a complete blackout, you won’t remember anything at all.

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Dangers of Blacking Out While Drinking

Many of the dangers of blacking out while drinking are related to your blood alcohol level. With a BAC of 0.16%, you may experience issues such as:

  • Nausea
  • Vomiting
  • Confusion
  • Loss of your normal body balance
  • Impaired muscle control

In many cases, people who black out are engaged in a practice called binge drinking. This practice is when someone drinks enough to get legally drunk in no more than a couple of hours. The long list of harms associated with alcohol binging includes:

  • Accidental injuries
  • Alcohol poisoning
  • Increased chances of committing violence or being exposed to it
  • Higher odds of committing sexual assault or being exposed to it

Repeated episodes of blackout drinking can also lead to more serious problems with your memory. In addition, they may be a warning sign of existing or oncoming alcohol addiction.

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Learn More About the Risks of Getting Blackout Drunk at Women’s Recovery

Are you or someone you love affected by alcohol blackouts? Talk to the professionals at Women’s Recovery. We understand women’s unique risks for this serious problem. We also understand what it takes to lower your risks and stay healthy.

Women’s Recovery specializes in alcohol treatment plans specifically designed for women. We also further customize these plans to fit your unique recovery needs. For more information on how we can help, call us today at 833.754.0554 or fill out our online contact form.

Common questions

Explore articles on mental health and substance use and substance use care that sees the whole woman for related guidance. Call admissions when you want to discuss your own situation.

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01 Is a blackout the same as passing out?

No. During a blackout, someone may remain awake and interact while the brain fails to form lasting memories. Passing out involves losing consciousness. An awake appearance does not establish safety because attention, impulse control, judgment, and decision-making may be seriously impaired during the intoxication associated with a blackout.

02 Will memories from an alcohol blackout eventually return?

A blackout happens when alcohol disrupts the transfer of memories into long-term storage. Missing memories may not return, so no one can promise that they will. If the gap is worrying you, a health professional can consider the episode, related harms, and your broader alcohol use. One blackout alone does not establish alcohol use disorder, but appropriate care can help you understand the concern and consider support.

03 When should I call 911 for someone who has been drinking?

Call 911 immediately if you suspect alcohol overdose, including confusion, inability to wake, seizures, vomiting, slow or irregular breathing, clammy skin, or pale or bluish coloring. Do not wait for every sign. Stay with the person and reduce choking risk while emergency responders are coming.

04 Can medications increase alcohol blackout risk?

Yes. Certain medications used for sleep and anxiety are associated with greater blackout risk when combined with alcohol. Interactions may make intoxication more dangerous or unpredictable. A qualified health professional can address medication-specific concerns. A blackout is not a reason to change prescribed medication independently.

05 Where can I discuss a blackout in Denver?

Contact Women’s Recovery at 833.754.0554 or visit 3801 E Florida Ave, Ste 650, Denver, CO 80210. You can talk about the blackout, your alcohol use, and possible support in a conversation. Diagnosis requires an appropriate assessment, and you can make your own choice about next steps. If anyone currently has signs of alcohol overdose, call 911 immediately instead.

Evidence behind this page

Supporting health information

Read how we select health information sources and apply the Women’s Recovery editorial policy. These references provide general education and context; they do not establish an individual diagnosis, service, or treatment recommendation.

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