Alcohol poisoning occurs when the amount of alcohol in your bloodstream becomes high enough to shut down basic life-support functions like breathing, heart rate, and temperature regulation. It typically begins at a blood alcohol concentration (BAC) of 0.30% to 0.40%, though dangerous symptoms can appear at lower levels depending on your body size, tolerance, and how quickly you drank. Above 0.40% BAC, the risk of coma and death from respiratory failure is significant.
The distinction between “very drunk” and “alcohol poisoning” matters because poisoning can kill someone who looks like they’re just sleeping it off. Understanding the specific warning signs can help you recognize when a situation has become a medical emergency.
How Alcohol Poisoning Differs From Being Drunk
Someone who is heavily intoxicated will slur their words, stumble, and make poor decisions, but they can still respond to you, breathe normally, and stay conscious. Alcohol poisoning crosses into different territory. The brain’s most fundamental control centers, the ones that keep you breathing and prevent you from choking on your own vomit, start failing. The body loses its ability to protect itself.
One of the most dangerous features of alcohol poisoning is that BAC can continue rising even after a person stops drinking. Alcohol takes time to move from the stomach and intestines into the bloodstream, so someone who seems “just drunk” after a round of shots may deteriorate significantly over the next 30 to 60 minutes. This is why people who pass out after heavy drinking can die in their sleep.
Signs That Indicate a Medical Emergency
The National Institute on Alcohol Abuse and Alcoholism identifies these critical signs of alcohol overdose:
- Breathing problems: fewer than 8 breaths per minute, or gaps of 10 seconds or more between breaths
- Loss of consciousness: inability to wake the person up, or difficulty staying conscious
- Vomiting while unconscious: especially dangerous because the gag reflex may be suppressed, creating a choking risk
- Seizures
- Slow heart rate
- Clammy skin, bluish or pale skin color
- Extremely low body temperature
- Mental confusion or stupor
You don’t need to see all of these signs at once. Even one or two, particularly slow or irregular breathing combined with unconsciousness, signals a life-threatening situation. The suppressed gag reflex is especially critical: it means a person can inhale their own vomit without waking up, which can cause suffocation or severe lung damage.
What Happens Inside the Body
At poisoning-level concentrations, alcohol suppresses the central nervous system so severely that the brainstem can no longer maintain automatic functions. Breathing slows or becomes irregular. Heart rate drops. Body temperature falls because blood vessels dilate and release heat faster than the body can produce it.
Alcohol also causes blood sugar to spike and then crash. In the hours following heavy consumption, glucose levels can fall far below normal, a condition called hypoglycemia. This drop in blood sugar makes seizures more likely, with most occurring roughly 12 hours after the last drink. At the same time, slowed breathing reduces the amount of oxygen reaching the brain. This combination of low oxygen and low blood sugar can cause permanent brain damage even in people who survive.
Who Is Most at Risk
Alcohol poisoning is not limited to young college students, though binge drinking in that age group gets the most attention. Data from the CDC shows that alcohol-related deaths most commonly involve adults 35 and older. Between 2020 and 2021, excessive alcohol use caused roughly 178,000 deaths per year in the United States, a 29% increase compared to just a few years earlier. About 61,000 of those annual deaths were tied to drinking too much on a single occasion, a category that includes alcohol poisoning alongside crashes, overdoses, and suicides. Roughly 4,000 deaths each year involved people under 21.
Several factors make some people more vulnerable than others. Smaller body size means less water volume to dilute the alcohol. Drinking on an empty stomach accelerates absorption. Mixing alcohol with opioids, sedatives, or sleep medications compounds the depressant effects on the brain and can push someone into respiratory failure at lower BAC levels than alcohol alone would. People with lower tolerance, including those who rarely drink, reach dangerous concentrations faster.
What to Do If Someone Shows These Signs
If you suspect alcohol poisoning, call emergency services immediately. There is no home remedy that works. Coffee, cold showers, and “sleeping it off” do not lower BAC or protect the brain from oxygen deprivation. The person’s BAC may still be rising, meaning their condition can worsen rapidly even without another drink.
While waiting for help, turn the person onto their side. This position helps prevent choking if they vomit. Stay with them and monitor their breathing. If they stop breathing or their breathing drops below 8 breaths per minute, relay that information to the 911 dispatcher. Do not leave an unconscious person alone on their back.
What Happens at the Hospital
Treatment for alcohol poisoning is primarily supportive, meaning the medical team focuses on keeping the body functioning while the liver processes the alcohol. This typically involves fluids to combat dehydration, monitoring of breathing and heart rate, and warming measures if body temperature has dropped. If breathing becomes dangerously slow, the person may need help with a breathing tube.
Stomach pumping is rarely done. It only makes sense if the person arrives at the hospital very shortly after drinking and a significant amount of alcohol might still be sitting in the stomach unabsorbed. In most cases, by the time someone reaches the ER, the alcohol has already entered the bloodstream and there is nothing left to pump.
Recovery time varies widely. Someone with a BAC in the 0.30% range who receives prompt treatment may stabilize within several hours but will likely feel severely ill for a day or more. Complications like aspiration pneumonia (from inhaling vomit), kidney stress, or persistent low blood sugar can extend the hospital stay and create longer-term health issues.