Alcohol poisoning shows up as a cluster of dangerous physical signs: slow or irregular breathing, mental confusion, vomiting while unconscious, seizures, and skin that looks blue, gray, or pale. If someone has even two or three of these symptoms after heavy drinking, they need emergency help immediately. This is not the same as being “really drunk.” Alcohol poisoning means the body is shutting down functions it needs to stay alive.
The Warning Signs That Matter Most
The single most reliable indicator is breathing. Fewer than eight breaths per minute, or gaps of 10 seconds or more between breaths, signals that alcohol is suppressing the part of the brain that controls automatic body functions. A normal breathing rate at rest is 12 to 20 breaths per minute, so anything noticeably slow or irregular is cause for alarm.
Other critical signs include:
- Mental confusion or stupor beyond normal intoxication, where the person can’t respond to questions or follow what’s happening around them
- Inability to wake up or stay conscious
- Vomiting, especially while passed out or semiconscious
- Seizures
- Slow heart rate
- Cold, clammy skin that looks bluish, gray, or pale, particularly around the lips and fingernails
- Extremely low body temperature
You do not need to see all of these at once. Any combination of slowed breathing, unconsciousness, and vomiting is enough to call 911.
Why It Becomes Life-Threatening
Alcohol interferes with communication between nerve cells in the brain, suppressing the pathways that keep you alert and responsive. At very high levels, it starts shutting down the brain signals that control automatic survival functions: breathing, heart rate, body temperature, and the gag reflex.
The gag reflex is especially important. It’s what prevents you from choking when something enters your airway. When alcohol suppresses it, a person who vomits while passed out can choke to death. This is one of the most common ways alcohol poisoning kills. Body temperature can also drop so low that it triggers cardiac arrest, even in a warm room, because alcohol causes blood vessels near the skin to open and release heat.
Alcohol also blocks the liver’s ability to release stored glucose into the bloodstream. The resulting blood sugar crash can cause seizures and loss of consciousness on top of the direct effects of alcohol on the brain.
How Much Drinking Causes It
Binge drinking is the most common path to alcohol poisoning. The NIAAA defines binge drinking as reaching a blood alcohol concentration of 0.08% or higher, which typically happens when a man consumes five or more drinks, or a woman consumes four or more drinks, in about two hours. Alcohol poisoning generally occurs well beyond that threshold.
At a BAC of 0.16% to 0.30%, a person will have serious difficulty walking and speaking, may black out, vomit, or lose consciousness. Above 0.31%, the situation becomes potentially fatal: breathing can stop, coma is possible, and the risk of death rises sharply. For context, a BAC of 0.31% is roughly four times the legal driving limit.
The body processes about one standard drink per hour. One standard drink equals 12 ounces of beer, 5 ounces of wine, or 1.5 ounces of liquor. Drinking faster than this rate causes alcohol to accumulate in the bloodstream, and the more it accumulates, the closer someone gets to dangerous territory. Body weight, food intake, tolerance, and how quickly someone drinks all influence where the tipping point falls.
What to Do While Waiting for Help
Call 911 first. Then turn the person on their side so that if they vomit, it drains out of their mouth instead of blocking their airway. This is sometimes called the recovery position. Stay with them and keep monitoring their breathing. If they stop breathing, tell the 911 operator immediately.
Do not leave someone alone to “sleep it off.” Blood alcohol levels can continue rising for 30 to 40 minutes after the last drink, which means a person who seems only very drunk right now can slide into alcohol poisoning over the next half hour. Do not give them coffee, put them in a cold shower, or try to walk them around. None of these speed up the body’s processing of alcohol. The liver breaks down alcohol on a fixed schedule, and nothing changes that rate. Coffee and cold water may make someone feel more alert momentarily, but their BAC stays exactly the same.
How It Differs From Being Very Drunk
The line between severe intoxication and poisoning can be hard to see, which is part of what makes it so dangerous. A very drunk person is sloppy, loud, uncoordinated, and may slur their words badly. But they can still respond when you talk to them, they can still be woken up, and their breathing stays in a normal range.
Alcohol poisoning looks different. The person becomes quiet, unresponsive, or semiconscious. Their skin may feel cold and look off-color. Their breathing visibly slows or becomes irregular. They may vomit without waking up. If you try to rouse them and they don’t respond, or if their body feels cold and limp, that is not normal drunkenness. That is a medical emergency.
What Happens at the Hospital
Emergency treatment focuses on keeping the person alive while their body clears the alcohol. That typically means fluids given through an IV to prevent dehydration, oxygen support if breathing is too slow, and close monitoring of heart rate, temperature, and blood sugar. In some cases, if the person arrived very soon after drinking a large amount, the medical team may use methods to reduce the alcohol still sitting in the stomach, though this is only effective within the first 30 to 60 minutes after ingestion.
Most people who receive timely treatment recover fully. The danger lies almost entirely in the gap between when symptoms start and when help arrives. The body can survive a surprisingly high BAC with proper medical support, but it cannot reliably survive one without it.