Alcohol poisoning is a medical emergency marked by specific, observable warning signs: breathing that drops below eight breaths per minute, inability to stay conscious, seizures, and skin that turns blue, gray, or pale. If you or someone near you is showing any of these signs after heavy drinking, call 911 immediately. Blood alcohol levels between 0.30% and 0.40% typically cause alcohol poisoning and loss of consciousness, and levels above 0.40% can be fatal.
The Warning Signs to Watch For
Alcohol poisoning looks different from simply being very drunk. The key symptoms are:
- Slow or irregular breathing: fewer than eight breaths per minute, or gaps of 10 seconds or more between breaths
- Confusion or stupor: not just slurred speech, but an inability to respond coherently or recognize where they are
- Trouble staying conscious: passing out and being difficult or impossible to wake up
- Vomiting while unconscious or semiconscious
- Seizures
- Skin changes: bluish, gray, or unusually pale skin, especially around the lips or fingertips
- Clammy skin and extremely low body temperature
You don’t need to see all of these at once. Even one or two of these signs, particularly the breathing changes or inability to wake someone, means the situation is dangerous. The difference between “really drunk” and alcohol poisoning often comes down to what’s happening with breathing and consciousness. A very drunk person can still be roused, still responds to their name, and breathes normally. Someone with alcohol poisoning cannot.
Why It Gets Worse After You Stop Drinking
One of the most dangerous things about alcohol poisoning is that it can intensify even after the last drink. Alcohol continues absorbing from the stomach and intestines into the bloodstream for some time after you stop drinking. This means someone who seemed okay 20 minutes ago can deteriorate quickly. It’s the reason “sleeping it off” can be deadly rather than helpful.
At very high levels, alcohol suppresses the brain’s automatic survival reflexes. The gag reflex, which normally prevents you from choking, stops working properly. A person who vomits while passed out can choke to death because their body no longer clears the airway on its own. Alcohol also depresses the part of the brain that controls breathing, which is why respiratory failure is the most common cause of death from alcohol poisoning.
On top of that, alcohol poisoning triggers secondary problems that compound the danger. Body temperature can drop to dangerously low levels. Blood sugar can plummet as well, and because the symptoms of low blood sugar (confusion, loss of coordination, unconsciousness) overlap with drunkenness, this complication often goes unrecognized. In hypothermic patients, low blood sugar may be present in up to 40% of cases but gets masked by the cold itself.
How Much Alcohol Causes Poisoning
Binge drinking is the most common path to alcohol poisoning. The NIAAA defines binge drinking as five or more drinks for men, or four or more drinks for women, in about two hours. Alcohol poisoning typically happens when someone goes well beyond this threshold, but the exact amount varies significantly based on body weight, tolerance, how fast you drank, whether you’ve eaten, and your overall health.
There’s no reliable formula to calculate your own blood alcohol level in real time. The dangerous range (0.30% to 0.40%) is roughly three to four times the legal driving limit, but people reach it faster than they expect, especially with shots, mixed drinks that mask alcohol content, or drinking games. Someone who is smaller, hasn’t eaten, or rarely drinks can reach toxic levels with fewer drinks than someone who is larger or more experienced with alcohol.
What to Do Right Now
If someone is unconscious or semiconscious after drinking and you cannot wake them, call 911. Don’t wait to see if they improve. While waiting for help, roll them onto their side to keep their airway clear. The technique is straightforward: raise the arm closest to you above their head, gently roll them toward you, then tilt their head up slightly and tuck their nearest hand under their cheek. This position keeps the face angled toward the floor so that if they vomit, it drains out rather than blocking the airway.
Stay with them. Monitor their breathing by counting breaths for 30 seconds and doubling it. If you’re getting fewer than eight breaths per minute, or you notice long pauses between breaths, tell the 911 dispatcher. Don’t try to give them food, coffee, or water. Don’t put them in a cold shower. These common instincts don’t help and can make things worse, particularly if the person is already hypothermic or at risk of choking.
What Happens at the Hospital
Hospital treatment for alcohol poisoning focuses on keeping the body stable while alcohol clears from the system. That typically means IV fluids to combat dehydration, along with vitamins and glucose to prevent complications like dangerously low blood sugar or brain damage. If breathing has become too slow or unreliable, oxygen support helps maintain safe levels until the brain recovers enough to regulate breathing on its own.
In rare cases involving poisoning from non-beverage alcohols (like methanol found in some industrial products), a blood-filtering procedure called hemodialysis may be used to remove the toxin faster than the body can process it. For standard alcohol poisoning from beer, wine, or liquor, the main treatment is supportive care and time. Most people recover fully with prompt treatment, but delayed care increases the risk of brain damage, organ injury, or death.
Why “Sleeping It Off” Can Kill
The instinct to let someone sleep it off is one of the most dangerous responses to alcohol poisoning. A person who is simply very drunk will typically respond when you shake them, speak to them loudly, or pinch the skin on the back of their hand. Someone with alcohol poisoning may not respond to any of these. If you cannot wake someone up, that is not deep sleep. It is a medical emergency.
Even someone who was talking and walking a short time ago can lose consciousness as alcohol continues absorbing into the blood. Left alone, they face three immediate threats: choking on vomit because the gag reflex is suppressed, breathing that slows and eventually stops, and body temperature dropping low enough to cause cardiac problems. Each of these can be fatal on its own, and alcohol poisoning often triggers all three simultaneously.