The symptoms of alcohol poisoning include slow or irregular breathing, vomiting, confusion, seizures, pale or blue-tinged skin, low body temperature, and loss of consciousness. These signs appear when alcohol levels in the blood rise high enough to shut down basic functions the brain normally controls automatically, like breathing and temperature regulation. Recognizing them quickly matters because alcohol poisoning kills: one in eight deaths among U.S. adults aged 20 to 64 is linked to excessive alcohol use.
How Alcohol Poisoning Affects the Brain
Alcohol suppresses nerve cells in the brain and spinal cord. At low doses, this produces the familiar relaxed, loosened-up feeling. But as the amount of alcohol in your blood climbs, that suppression spreads deeper into brain regions responsible for involuntary functions: breathing rhythm, heart rate, the gag reflex, and body temperature control. This is why alcohol poisoning is not just “being really drunk.” It is a progressive shutdown of the systems that keep you alive without you thinking about it.
The gag reflex is one of the first involuntary protections to go. Without it, a person who vomits while unconscious can choke. Breathing centers in the brainstem slow next, and the body loses its ability to maintain normal temperature, which is why someone with alcohol poisoning often feels cold to the touch even in a warm room.
Symptoms at Each Stage
Alcohol poisoning develops on a spectrum tied to blood alcohol concentration (BAC). At a BAC between 0.15% and 0.30%, a person typically shows confusion, drowsiness, and vomiting. Speech becomes incoherent, coordination deteriorates sharply, and the person may not respond normally to questions or recognize where they are. Many people dismiss this stage as someone simply being very intoxicated, but it already carries real risk.
Above 0.30%, the danger escalates. Breathing may slow to fewer than 8 breaths per minute, or gaps of 10 seconds or more may appear between breaths. The person may become completely unresponsive, unable to be woken by shaking or loud noise. Skin can turn pale, grayish, or develop a bluish tint, particularly around the lips and fingertips, a sign that oxygen levels in the blood are dropping. Body temperature falls, sometimes dramatically. At a BAC over 0.40%, coma and death from respiratory arrest become likely.
One critical thing to understand: BAC can keep rising even after someone stops drinking. Alcohol takes time to move from the stomach and intestines into the bloodstream. A person who seems “just” drunk at midnight can be in a medical emergency 30 minutes later without taking another sip.
The Warning Signs That Matter Most
Some symptoms are easy to notice. Others are easy to miss, especially in a loud, chaotic environment. These are the ones to watch for:
- Breathing changes. Fewer than 8 breaths per minute, or pauses of 10 seconds or longer between breaths. Count it out. Normal breathing is 12 to 20 breaths per minute.
- Unresponsiveness. The person cannot be woken up, or wakes briefly and immediately loses consciousness again.
- Repeated vomiting, especially while semiconscious or unconscious.
- Skin changes. Pale, clammy, or blue-tinged skin, particularly on the lips and fingernails.
- Seizures. Sudden, uncontrolled shaking or convulsions.
- Cold body temperature. The person feels unusually cold to the touch or is shivering uncontrollably.
Any one of these signs is reason to call emergency services. You do not need to see all of them. The combination of unresponsiveness and slow breathing is especially dangerous and should be treated as a medical emergency without hesitation.
What to Do While Waiting for Help
If someone shows signs of alcohol poisoning, call 911 (or 999 in the UK) immediately. While waiting, there are a few things that genuinely help and several common instincts that can make things worse.
Stay with the person. The biggest immediate risks are choking on vomit and breathing failure, both of which can happen suddenly. If the person is unconscious or semi-conscious, roll them onto their side into the recovery position. This keeps the airway open and allows vomit to drain out of the mouth rather than back into the throat. Check that they are still breathing by watching their chest rise and fall.
Cover them with a blanket or coat. Alcohol poisoning causes body temperature to drop, and hypothermia can develop quickly, especially outdoors. Keep them as warm as possible.
Do not give them anything to eat or drink. An unconscious or semiconscious person can choke on food, water, or coffee. Do not try to make them vomit. Do not put them in a cold shower, which can worsen hypothermia and cause shock. Do not leave them alone to “sleep it off.” The idea that someone just needs to sleep through it is one of the most dangerous assumptions people make about alcohol poisoning.
What Happens at the Hospital
The first priority in a hospital setting is making sure the person can breathe. If breathing has slowed dangerously, supplemental oxygen or assisted ventilation may be needed. Because alcohol acts as a diuretic, dehydration is common, and intravenous fluids are typically given to stabilize blood pressure and restore hydration. Blood sugar often drops during severe intoxication, so that gets corrected as well.
Heart monitoring is standard for heavily intoxicated patients. In people who drink heavily on a regular basis, doctors may also address vitamin deficiencies that alcohol depletes over time. There is no drug that reverses alcohol intoxication the way certain medications reverse opioid overdoses. Treatment is supportive: keep the body stable and functioning until alcohol is metabolized and cleared.
Most people who receive prompt medical care for alcohol poisoning survive. Recovery time varies depending on the severity, but a hospital stay of several hours to overnight is typical. The body clears alcohol at a relatively fixed rate, roughly one standard drink per hour, and there is no way to speed that up.
Who Is Most at Risk
Binge drinking is the most common path to alcohol poisoning. For most adults, that means consuming four or five drinks within about two hours. But individual tolerance varies enormously based on body weight, how recently you ate, how quickly you drank, and whether other substances are involved. Mixing alcohol with sedatives, opioids, or sleep medications dramatically increases the risk because those substances suppress the same brain functions alcohol does.
Young adults, particularly college-aged drinkers, are at high risk because of drinking games and social pressure to consume large amounts quickly. But alcohol poisoning is not limited to any age group. CDC data shows that deaths from excessive alcohol use increased roughly 29% between 2016 and 2021, climbing from about 138,000 to over 178,000 average annual deaths in the United States. That increase occurred across all age groups.
People with smaller body mass reach dangerous BAC levels faster. Someone who rarely drinks will also be affected more quickly than someone with a higher tolerance, though tolerance does not protect against poisoning. A person with high tolerance may simply reach a lethal BAC before showing the outward signs that would alarm the people around them.