Alcohol poisoning is a serious, potentially fatal condition that occurs when you drink so much alcohol that your body can’t process it fast enough, and the excess begins shutting down basic life-support functions in your brain. It typically happens at a blood alcohol concentration (BAC) of 0.30% to 0.40%, though it can occur at lower levels depending on your size, tolerance, and health. Above 0.40%, the risk of coma and death from stopped breathing rises sharply. In the United States, alcohol-related poisoning kills an average of nearly 22,000 people per year.
How Alcohol Poisoning Happens
Your liver processes alcohol at a fixed rate of roughly one standard drink per hour. A standard drink is 12 ounces of beer, 5 ounces of wine, or 1.5 ounces of liquor. When you drink faster than that pace, alcohol accumulates in your bloodstream and keeps rising even after you stop drinking. This is why binge drinking is the most common cause of alcohol poisoning. For men, binge drinking means five or more drinks in about two hours. For women, it’s four or more in the same window.
The danger comes from what alcohol does to your brain at high concentrations. Alcohol is a depressant, meaning it slows down nerve signaling. At moderate levels, this produces the familiar effects of relaxation and impaired coordination. But when levels climb high enough, alcohol begins suppressing the parts of the brain that control breathing, heart rate, and body temperature. These are involuntary functions you have no conscious control over, and when they falter, the situation becomes life-threatening within minutes.
Signs to Recognize
The symptoms of alcohol poisoning go well beyond being “very drunk.” According to the National Institute on Alcohol Abuse and Alcoholism, the critical warning signs include:
- Mental confusion or stupor that goes beyond normal intoxication
- Inability to stay conscious, or being impossible to wake up
- Slow breathing, defined as fewer than 8 breaths per minute
- Irregular breathing, with gaps of 10 seconds or more between breaths
- Vomiting while unconscious or semiconscious
- Seizures
- Slow heart rate
- Clammy skin, bluish or pale skin color
- Extremely low body temperature
- No gag reflex, which normally prevents choking
You don’t need to see all of these signs for the situation to be dangerous. Even one or two, especially slow or irregular breathing combined with unconsciousness, signals an emergency.
Why It Can Turn Fatal
The most immediate threat is that breathing slows or stops entirely. Because the brain regions controlling respiration are suppressed, a person with alcohol poisoning can simply stop breathing in their sleep. This is the primary cause of death in alcohol overdose cases.
Choking is the second major risk. Vomiting is common at high BAC levels, but alcohol also suppresses the gag reflex. If someone vomits while unconscious and their gag reflex isn’t working, they can inhale vomit into their lungs. This blocks the airway and can cause a fatal form of suffocation, or lead to a severe lung infection called aspiration pneumonia if they survive.
Hypothermia is another danger. Alcohol dilates blood vessels near the skin, which makes you feel warm but actually accelerates heat loss from your core. Combined with the brain’s impaired ability to regulate temperature, this can drop body temperature to dangerously low levels, especially if someone passes out outdoors or in a cool environment. Seizures caused by low blood sugar or the toxic effects of alcohol on the brain add yet another layer of risk.
What to Do If Someone Has Symptoms
Call emergency services immediately. There is no home remedy for alcohol poisoning, and waiting to “see if they sleep it off” is the most dangerous choice you can make. BAC can continue rising for 30 to 90 minutes after the last drink as alcohol in the stomach is still being absorbed, so someone who seems stable can deteriorate quickly.
While waiting for help, the NHS recommends sitting the person up if they’re awake. If they’ve passed out, place them in the recovery position: on their side with their top knee bent forward to prevent them from rolling onto their back. This keeps the airway clear if they vomit. Stay with them and monitor their breathing. Do not leave them alone, do not give them coffee or food, and do not put them in a cold shower. None of these things speed up alcohol metabolism, and some can make the situation worse.
What Happens at the Hospital
Treatment in the emergency room is primarily supportive, meaning the medical team focuses on keeping you alive and stable while your body processes the alcohol. The first priority is always airway, breathing, and circulation. If breathing is dangerously slow, a breathing tube may be placed. Fluids are given intravenously to prevent dehydration and support blood pressure. Body temperature and blood sugar are monitored and corrected if needed.
In severe cases where BAC is extremely high, dialysis can be used to filter alcohol directly from the blood, though this is relatively rare for standard ethanol poisoning. It’s more commonly needed in poisonings involving methanol (found in some industrial products) or ethylene glycol (antifreeze), which produce toxic byproducts that can cause blindness, kidney failure, and death.
Who Is Most at Risk
Men account for a disproportionate share of alcohol poisoning deaths. CDC data from 2020 to 2021 shows that men died from alcohol-related poisoning at a rate of 9.5 per 100,000, compared to 3.8 per 100,000 for women. This largely reflects higher rates of heavy drinking among men, though biological differences in body composition and alcohol metabolism also play a role.
Body weight, how recently you’ve eaten, medications you’re taking, and whether you have any liver disease all affect how quickly alcohol accumulates in your system. People who take sedatives, opioids, or certain antidepressants face heightened danger because these substances compound alcohol’s depressant effects on the brain. Even at moderate BAC levels, combining alcohol with other depressants can suppress breathing enough to be fatal.
A Risk for Children Too
Alcohol poisoning isn’t limited to parties and bars. Young children are vulnerable to accidental poisoning from household products that contain alcohol. Mouthwash and hand sanitizer are two of the most common sources, and both can contain enough alcohol to be dangerous to a small child who swallows even a modest amount. Bathroom cleaners and certain all-purpose household cleaners may also contain alcohol. Keeping these products stored out of reach and out of sight is the most effective prevention. If a child swallows any alcohol-containing product, contact Poison Control (1-800-222-1222 in the U.S.) or emergency services immediately.