The signs of alcohol poisoning include mental confusion, vomiting, seizures, slow or irregular breathing, and an inability to stay conscious or wake up. Breathing that drops below eight breaths per minute or pauses of 10 seconds or more between breaths is one of the most urgent warning signs. Alcohol poisoning is a medical emergency that kills thousands of people in the United States each year, and recognizing the symptoms early can be the difference between life and death.
The Critical Signs to Watch For
Alcohol poisoning happens when someone drinks enough alcohol to shut down the areas of the brain that control basic life-support functions like breathing, heart rate, and temperature regulation. The signs often appear in a recognizable cluster:
- Mental confusion or stupor: The person may not know where they are, may be unable to answer simple questions, or may seem completely unresponsive.
- Difficulty staying conscious: They drift in and out of consciousness, or you cannot wake them up at all.
- Vomiting: Especially dangerous because alcohol suppresses the gag reflex. A person who vomits while unconscious can choke and suffocate.
- Seizures: The brain’s electrical activity becomes disrupted at very high alcohol levels.
- Slow breathing: Fewer than eight breaths per minute, or gaps of 10 seconds or more between breaths.
- Slow heart rate: Alcohol is a depressant that progressively slows the cardiovascular system.
- Cold, clammy skin: Skin may look blue, gray, or pale as body temperature drops.
- Extremely low body temperature: Hypothermia can become severe enough to trigger cardiac arrest.
You do not need to see all of these signs at once. Even one or two, particularly the breathing changes or an inability to wake someone up, signals a life-threatening situation.
How Blood Alcohol Levels Relate to Danger
A blood alcohol concentration (BAC) between 0.16 and 0.30 percent produces serious impairment: difficulty walking and speaking, confusion, nausea, blackouts, vomiting, and possible loss of consciousness. Above 0.31 percent, the risk of fatal outcomes rises sharply. Breathing can stop, the person may slip into a coma, and death becomes a real possibility.
What makes alcohol poisoning unpredictable is that BAC can keep climbing even after someone stops drinking. Alcohol in the stomach and intestines continues to absorb into the bloodstream for up to 40 minutes or more after the last drink. A person who seems “just drunk” can deteriorate quickly while the alcohol already consumed works its way into their blood. This is why it’s dangerous to assume someone will simply “sleep it off.”
What Happens Inside the Body
At poisoning-level concentrations, alcohol suppresses the brainstem, which controls involuntary functions. Breathing slows because the signals telling the lungs to inflate weaken. Heart rate drops. The gag reflex disappears, leaving someone defenseless against choking on their own vomit. Body temperature regulation fails, and core temperature can fall dangerously low.
Alcohol also causes blood sugar to drop, sometimes to dangerously low levels. In severe cases, this alone can trigger seizures and loss of consciousness. Meanwhile, high blood alcohol levels are directly toxic to brain cells. Animal research has confirmed that binge-level alcohol exposure causes a form of brain cell death where neurons physically shrink and break down, even without any nutritional deficiency. In humans, this means a single episode of severe alcohol poisoning can cause lasting cognitive damage.
Severe dehydration compounds the problem. Alcohol is a powerful diuretic, and vomiting accelerates fluid loss. The combination of low blood sugar, low body temperature, depressed breathing, and dehydration is what makes alcohol poisoning lethal.
The Difference Between Drunk and Dying
Many people struggle to tell when someone has crossed the line from very intoxicated to dangerously poisoned. A few distinctions help. Someone who is very drunk can usually respond to being spoken to, even if they’re slurring or unsteady. Someone experiencing alcohol poisoning may not respond at all, or may only groan without opening their eyes. Skin color is another clue: flushed skin is common with intoxication, but blue, gray, or pale skin signals that oxygen levels are dropping. Breathing patterns matter most. Count the breaths. If you’re seeing fewer than eight in a minute, or long pauses between breaths, that person needs emergency help immediately.
Vomiting while unconscious is particularly dangerous. A conscious person who vomits after drinking too much is uncomfortable but can usually protect their own airway. An unconscious person who vomits can inhale the vomit into their lungs, which can be fatal within minutes.
What to Do While Waiting for Help
If you suspect someone has alcohol poisoning, call emergency services. While you wait, you can place the person in the recovery position to help keep their airway clear. Raise the arm closest to you above their head, then gently roll their entire body toward you, guarding their head as you roll them onto their side. Tilt their head back slightly to keep the airway open, and tuck their nearest hand under their cheek to hold the head in position. This allows vomit to drain out of the mouth rather than back into the throat.
Stay with the person and monitor their breathing. If they stop breathing, begin CPR if you’re trained to do so.
What Does Not Help
Coffee, cold showers, walking someone around, or trying to get them to eat will not reverse alcohol poisoning. Caffeine does not counteract alcohol’s effects on the brainstem. It can create a false sense of alertness while breathing and heart rate continue to decline. A cold shower risks worsening hypothermia, which is already a life-threatening complication. Trying to make someone vomit is dangerous because their gag reflex may be gone, and forcing vomit increases the risk of choking or aspiration.
The only effective treatment is emergency medical care, where professionals can protect the airway, support breathing, and manage complications like low blood sugar and hypothermia.
Who Is Most at Risk
Excessive alcohol use causes roughly 178,000 deaths per year in the United States, and about one-third of those deaths involve binge drinking on a single occasion, a category that includes alcohol poisoning. These deaths are not limited to young college students, though about 4,000 deaths per year occur in people under 21. Most alcohol-related deaths involve adults 35 and older.
Several factors increase the risk of poisoning at lower amounts of alcohol than you might expect. Smaller body size, lack of food in the stomach, drinking speed, and tolerance all play a role. Mixing alcohol with sedatives, opioids, or sleep medications is especially dangerous because these substances compound alcohol’s effect on the brainstem. Someone taking any of these medications can reach poisoning-level suppression of breathing at a much lower BAC than someone drinking alcohol alone.