Alcohol poisoning means your body has more alcohol in it than it can safely process, and the excess is shutting down basic functions like breathing, temperature regulation, and consciousness. It typically occurs when blood alcohol concentration reaches 0.30% to 0.40%, a level where loss of consciousness is likely. Above 0.40%, coma and death become real possibilities.
This isn’t the same as being very drunk. Alcohol poisoning is a medical emergency where the body’s automatic survival systems start failing.
What Happens Inside Your Body
Alcohol is a central nervous system depressant. In small amounts, it slows your thinking and loosens inhibitions. In large amounts, it begins suppressing the parts of your brain that control things you never have to think about: breathing, heart rate, body temperature, and the reflex that keeps you from choking on your own vomit.
At toxic levels, alcohol amplifies the activity of your brain’s main “slow down” chemical signals, essentially telling your nervous system to quiet down far beyond what’s safe. This effect is especially dangerous for breathing. Alcohol doesn’t just make you breathe more slowly. It weakens the muscles that keep your airway open, particularly during unconsciousness, through its influence on the brain’s arousal and sleep-promoting systems. Your body can simply stop maintaining the effort of breathing.
One of the most dangerous consequences is the loss of the gag reflex. Normally, if something enters your airway, your body coughs or gags to clear it. Alcohol suppresses that reflex. Research published in BMJ Open found that patients who lost their protective airway reflexes during severe intoxication had a 45% rate of aspiration (inhaling vomit or fluid into the lungs), compared to just 6% in those whose reflexes were still intact. Aspiration can cause life-threatening pneumonia or suffocation, even in someone who might otherwise survive the alcohol in their system.
Signs That Distinguish Poisoning From Drunkenness
Most people can recognize when someone has had too much to drink. Alcohol poisoning looks different. The National Institute on Alcohol Abuse and Alcoholism identifies these critical warning signs:
- Slow breathing: fewer than 8 breaths per minute
- Irregular breathing: gaps of 10 seconds or more between breaths
- Seizures
- Extremely low body temperature, bluish or pale skin
- Clammy skin
- Unconsciousness where the person cannot be woken up
A common and dangerous mistake is assuming someone who has passed out from drinking just needs to “sleep it off.” Alcohol continues to absorb from the stomach into the bloodstream after a person stops drinking. Someone who seems to be sleeping may actually have a rising BAC and worsening symptoms. If you can’t wake the person, or if they show any of the signs above, that’s alcohol poisoning.
How Much Alcohol Causes It
There’s no single number of drinks that triggers alcohol poisoning in everyone. It depends on body weight, how quickly the drinks were consumed, whether the person ate beforehand, their tolerance level, and individual metabolism. Binge drinking, particularly drinking a large amount in a short window, is the most common cause because the liver can only process roughly one standard drink per hour. Anything beyond that accumulates in the bloodstream.
BAC levels between 0.30% and 0.40% generally mark the poisoning range, with loss of consciousness as the hallmark. For context, the legal driving limit in most U.S. states is 0.08%. Alcohol poisoning occurs at roughly four to five times that level. A BAC above 0.40% puts a person at risk of respiratory arrest, coma, and death.
What Happens at the Hospital
There is no quick antidote for alcohol poisoning. Treatment is focused on keeping the person alive and stable while their body clears the alcohol. That typically involves intravenous fluids to prevent dehydration, along with vitamins and glucose to reduce the risk of serious complications like dangerously low blood sugar or brain damage.
If the person’s airway is compromised, medical staff will work to keep it open and ensure they’re getting enough oxygen. In cases involving methanol or isopropyl alcohol (found in some industrial products, not standard beverages), hemodialysis may be used to filter the toxic substance from the blood more quickly than the body could on its own.
Hospital stays vary depending on severity. Mild cases where the person is monitored, rehydrated, and recovers consciousness may resolve within several hours. Severe cases involving breathing support, seizures, or aspiration can require days of intensive care.
The Scale of the Problem
Alcohol poisoning kills far more people than most realize. CDC data from 2020 to 2021 shows an average of 21,806 alcohol-related poisoning deaths per year in the United States. That figure includes both pure alcohol poisoning and cases where alcohol at high concentrations contributed to fatal drug overdoses. Men account for roughly 71% of these deaths (about 15,557 annually), with women making up the remaining 6,249. Death rates have increased across all age groups in recent years.
What to Do If You Suspect It
If someone is unconscious, breathing irregularly, having seizures, or can’t be woken up after heavy drinking, call emergency services immediately. While waiting, turn the person on their side to reduce the risk of choking if they vomit. Do not leave them alone, and do not try to give them coffee, food, or a cold shower. None of those things speed up alcohol processing, and they can create new dangers for someone whose brain is struggling to maintain basic functions.