The five classic signs of alcohol poisoning are mental confusion or stupor, vomiting, seizures, slow or irregular breathing, and low body temperature with pale or bluish skin. Recognizing even one of these signs in someone who has been drinking heavily is reason to call 911, because alcohol poisoning kills by shutting down the basic body functions that keep you alive.
The 5 Signs, Explained
These five warning signs reflect what happens when alcohol reaches toxic levels in the bloodstream, typically at a blood alcohol concentration (BAC) of 0.30% or higher. At that point, the brain is losing its ability to manage essential functions like breathing and temperature regulation.
1. Mental Confusion or Stupor
This goes well beyond being “really drunk.” A person with alcohol poisoning may not know where they are, who they’re with, or what’s happening. They might be awake but completely unresponsive to questions, or they may drift in and out of consciousness and be impossible to wake up. The inability to wake someone, even with loud sounds or shaking, is one of the most reliable red flags that their brain is being dangerously suppressed by alcohol.
2. Vomiting
Vomiting during alcohol poisoning is especially dangerous because the body’s protective reflexes are shutting down. Normally, your gag reflex keeps vomit from entering your airway. At toxic alcohol levels, that reflex is dulled or gone entirely. A person who vomits while unconscious or semi-conscious can choke to death, which is one of the most common ways alcohol poisoning becomes fatal.
3. Seizures
Alcohol at high concentrations disrupts the electrical signaling in the brain and can trigger seizures. These may look like full-body convulsions or subtler episodes of stiffening and jerking. A seizure in someone who has been drinking heavily is always an emergency, regardless of whether the person seems to “recover” from it.
4. Slow or Irregular Breathing
This is the sign that most directly threatens survival. Breathing that drops below 8 breaths per minute, or breathing with gaps of 10 seconds or more between breaths, means alcohol is suppressing the brainstem, the area that controls automatic breathing. A BAC above 0.40% puts a person at risk of respiratory arrest, where breathing stops altogether.
5. Low Body Temperature, Pale or Bluish Skin
Alcohol causes blood vessels near the skin to widen, which makes the body lose heat rapidly. A person with alcohol poisoning may feel cold and clammy to the touch. Skin that looks pale, bluish, or gray, especially around the lips and fingertips, signals that the body is not getting enough oxygen. This combination of hypothermia and poor oxygenation can lead to cardiac arrest.
Why “Sleeping It Off” Can Be Fatal
The most common mistake bystanders make is assuming someone who has passed out drunk just needs to sleep it off. The problem is that blood alcohol levels can keep rising even after a person stops drinking, because alcohol in the stomach and intestines is still being absorbed. Someone who seems okay when they lie down can deteriorate quickly.
A heavily intoxicated person who is still talking, walking, and responding to you is in a very different situation from someone showing the signs above. The dividing line is responsiveness. If you cannot wake them, if their breathing sounds labored or unusually slow, or if their skin is cold and discolored, their body is failing to cope with the amount of alcohol in their system.
What to Do While Waiting for Help
If someone is showing any of these five signs, call 911 immediately. While you wait:
- Turn them on their side. This is the single most important thing you can do. If the person vomits while on their back, they can aspirate it into their lungs and suffocate. Keeping them on their side lets vomit drain out of the mouth.
- Stay with them. Their condition can worsen quickly. Monitor their breathing and be ready to describe what you’re seeing to paramedics.
- Offer water only if they’re awake. Small sips of water can help, but never put anything in the mouth of someone who is unconscious or barely conscious. They cannot swallow safely.
- Don’t try home remedies. Cold showers, coffee, and walking them around do nothing to lower blood alcohol levels. These waste time and can cause falls or further drops in body temperature.
What Happens at the Hospital
Treatment for alcohol poisoning is largely supportive, meaning the medical team stabilizes the body while it processes the alcohol. Expect IV fluids to correct dehydration, along with vitamins and glucose to prevent complications like dangerously low blood sugar. Medical staff will closely monitor breathing and may provide assistance if it becomes too slow or stops. In rare cases involving ingestion of non-drinking alcohols (like methanol from contaminated spirits), a procedure called hemodialysis may be used to filter the toxin from the blood more quickly.
Most people who reach the hospital in time recover fully. The danger is almost entirely in the window before they get help, which is why recognizing these signs matters so much.
Who Is Most at Risk
Alcohol poisoning can happen to anyone, but some situations raise the odds significantly. Binge drinking, defined as consuming a large amount of alcohol in a short time, is the most common path to a toxic BAC. Drinking games, chugging liquor, and mixing alcohol with other depressants like opioids or sedatives all increase the risk. Body weight, tolerance, whether you’ve eaten recently, and how fast you’re drinking all affect how quickly alcohol accumulates in the blood.
Alcohol-related deaths in the United States have been climbing. Roughly 178,000 people per year died from excessive alcohol use in 2020 and 2021, a 29% increase compared to just a few years earlier. Alcohol-related poisonings, either alone or combined with other drugs, are among the leading causes within those numbers.