Alcohol poisoning shows up as a cluster of specific warning signs that go well beyond “being really drunk.” The most reliable red flags are breathing that slows to fewer than 8 breaths per minute, gaps of 10 seconds or more between breaths, inability to stay conscious or be woken up, seizures, and skin that turns bluish, pale, or clammy. If you see even one of these signs in someone who has been drinking heavily, call 911 immediately.
The Warning Signs That Matter Most
Plenty of people get sloppy or sick after drinking too much. Alcohol poisoning is different. It means there is enough alcohol in the bloodstream to start shutting down basic body functions, particularly breathing. Here are the signs to watch for:
- Slow or irregular breathing: Fewer than 8 breaths per minute, or pauses of 10 seconds or more between breaths.
- Can’t stay conscious: The person drifts in and out of consciousness or cannot be woken up at all.
- Mental confusion or stupor: Far beyond typical drunkenness. They may not know where they are, who they’re with, or what’s happening.
- Vomiting while unconscious or semi-conscious: Especially dangerous because the gag reflex may no longer work, creating a choking risk.
- Seizures.
- Extremely low body temperature: Skin feels cold and clammy. It may look bluish or unusually pale.
- Slow heart rate.
You don’t need to check off every item on this list. A single one of these symptoms is enough to treat the situation as an emergency.
Why Alcohol Poisoning Is Dangerous
Alcohol is a powerful sedative. At low doses it loosens you up. At high doses it does the same thing to the parts of your brain that control automatic functions like breathing, heart rate, and the gag reflex. Alcohol amplifies the activity of the brain’s main “slow down” chemical, which is why severe intoxication produces sedation, loss of coordination, and eventually unconsciousness. The life-threatening problem is respiratory depression: alcohol suppresses the brainstem signals that keep you breathing steadily.
At a blood alcohol concentration (BAC) between 0.30% and 0.40%, most people lose consciousness and are in the range where alcohol poisoning occurs. Above 0.40%, the risk of coma and death from stopped breathing climbs sharply. For reference, the legal driving limit in most U.S. states is 0.08%, so these levels represent roughly four to five times that amount.
The other major danger is choking. When the gag reflex stops working, a person who vomits while passed out can inhale vomit into their lungs. This can be fatal on its own, even if their breathing hasn’t slowed yet.
How Much Drinking Leads to Poisoning
There’s no single number of drinks that guarantees poisoning, because body weight, tolerance, food intake, speed of drinking, and individual metabolism all play a role. But it almost always involves binge drinking: five or more drinks on one occasion for men, or four or more for women. Alcohol poisoning typically happens when someone consumes a large amount in a short window, often during drinking games, celebrations, or situations where people are drinking hard liquor quickly.
One detail that surprises people: your BAC can keep rising even after you stop drinking. Alcohol in the stomach and intestines continues to be absorbed into the bloodstream for up to 40 minutes or more after the last drink. That means someone who seems “just really drunk” when they pass out can slide into a medical emergency while they’re unconscious, without drinking another drop.
What to Do if You Suspect It
Call 911 first. While you wait:
- If they’re awake: Sit them up and stay with them. If they’re vomiting, have them lean forward to prevent choking.
- If they’ve passed out: Roll them onto their side in the recovery position. This keeps the airway clear if they vomit. Check that they’re still breathing.
- Don’t leave them alone. Breathing can slow or stop without obvious warning.
Do not try to “sober them up” with coffee, cold showers, or food. None of these lower BAC or reverse the sedation happening in the brain. The only thing that clears alcohol from the body is time and, in severe cases, medical support to keep the person breathing and hydrated until their body processes the alcohol.
Why “Sleeping It Off” Can Be Fatal
The instinct to let a very drunk person “sleep it off” is one of the most dangerous responses to alcohol poisoning. When someone passes out from too much alcohol, they aren’t simply sleeping. Their brain is being suppressed by a toxin, and the level of that toxin may still be rising. During this time, breathing can slow to a dangerous rate, body temperature can drop, and vomiting can happen without the person waking up or being able to protect their airway.
If someone has passed out after heavy drinking and you can’t wake them, that alone is a reason to call for help. The difference between deep sleep and alcohol-induced unconsciousness isn’t always obvious from the outside, and erring on the side of caution is the right call. A person who can’t be roused, whose skin is cold or discolored, or whose breathing sounds irregular needs emergency care, not a pillow and a quiet room.
Who Is at Higher Risk
Smaller body size means alcohol reaches a higher concentration faster, so women and lighter individuals face greater risk at the same number of drinks. People who haven’t eaten recently absorb alcohol more quickly. Mixing alcohol with sedatives, opioids, or sleep medications dramatically increases the chance of respiratory depression because these substances amplify each other’s effects on the brain. Young and inexperienced drinkers are especially vulnerable because they may not recognize how impaired they’re becoming, and their peers may not recognize the signs either.