There is no way to make someone sober up faster. The liver breaks down alcohol at a fixed rate of about one standard drink per hour, and nothing you do, no remedy or trick, changes that speed. What you can do is keep the person safe and comfortable while their body does the work, and recognize the warning signs that mean they need emergency help.
Why Time Is the Only Real Answer
Your liver produces an enzyme that breaks alcohol down into less harmful substances. This process runs at a remarkably steady pace: roughly 0.015% blood alcohol concentration per hour, regardless of what else is happening in your body. If someone has had five drinks and their BAC is around 0.08%, it will take about five to six hours for their body to fully clear that alcohol. There are no shortcuts.
Several factors affect how high someone’s BAC climbs in the first place. Body size, biological sex, whether they ate beforehand, and how quickly they drank all play a role. Food in the stomach slows absorption, which means a lower peak BAC. But once alcohol is in the bloodstream, the clearance rate stays essentially the same. Eating a meal after someone is already drunk does not speed up the process. It only slows the absorption of any alcohol still sitting in the stomach.
Coffee, Cold Showers, and Other Myths
Coffee is probably the most common “cure” people reach for, and it does not work. The CDC is clear on this: caffeine does not reduce the effects of alcohol on your body. It can make a person feel more alert and energetic, which creates a dangerous illusion of sobriety. Someone who drinks coffee while drunk may feel capable of driving or making decisions when they are still fully impaired. This false confidence actually increases risk.
Cold showers follow the same pattern. They will wake someone up and might make the experience of being drunk less pleasant, but they have zero effect on how quickly the liver processes alcohol. The Hazelden Betty Ford Foundation puts it simply: the body rids itself of alcohol on a fixed schedule, and a cold shower does not change that schedule.
Exercise is another popular suggestion. While there is limited evidence that physical activity may slightly support liver function over time, any effect on alcohol clearance in the moment is negligible. Exercising while intoxicated also introduces serious risks: poor coordination, dehydration, and impaired judgment make injury much more likely. It is not worth it.
What You Can Actually Do to Help
Since you cannot speed up sobriety, focus on comfort and safety. If someone is conscious and cooperative, the most helpful things are straightforward:
- Water: Alcohol causes dehydration by increasing urine output. Drinking water will not lower someone’s BAC, but it helps with headaches, nausea, and the hangover that follows. Encourage small, steady sips rather than chugging a full glass, which can trigger vomiting.
- Food: A light snack can help stabilize blood sugar, which drops during heavy drinking. Simple carbohydrates like bread or crackers are easy on the stomach. This will not sober them up, but it can reduce nausea and lighten the overall misery.
- Rest: Sleep gives the liver uninterrupted time to do its job. A person who falls asleep drunk and stays asleep for six or seven hours will wake up significantly more sober simply because hours have passed.
The key mindset shift is this: you are not trying to reverse the intoxication. You are managing the wait.
Keeping a Drunk Person Safe While They Sleep
The biggest danger for someone who passes out drunk is choking on their own vomit. Alcohol suppresses the gag reflex, which means a sleeping person may not cough or turn their head if they vomit. This can be fatal. Never leave a heavily intoxicated person sleeping on their back.
Place them in the recovery position instead. With the person on their back, kneel beside them and extend the arm closest to you out at a right angle, palm facing up. Take their other hand and place the back of it against the cheek nearest you, holding it there. With your free hand, bend their far knee to a right angle, then pull that knee toward you to roll them gently onto their side. Their head should rest on their own hand, and the bent leg keeps them from rolling onto their stomach. Tilt their head back slightly to keep the airway open.
Check on them regularly. Look for steady breathing, normal skin color, and responsiveness. If you gently shake their shoulder or speak loudly and they do not react at all, that is a warning sign.
Signs That Need Emergency Help
Alcohol poisoning is a medical emergency, and it kills. The line between “very drunk” and “in danger” is not always obvious, so knowing the specific warning signs matters. According to the National Institute on Alcohol Abuse and Alcoholism, call emergency services if you see any of these:
- Breathing problems: fewer than 8 breaths per minute, or gaps of 10 seconds or more between breaths
- Inability to wake up: the person cannot be roused by shaking, shouting, or pinching
- Seizures
- Vomiting while unconscious
- Skin changes: clammy skin, bluish tint to the lips or fingertips, extreme paleness, or very low body temperature
- Mental confusion or stupor: far beyond normal drunkenness, the person seems completely disconnected from their surroundings
Do not wait for multiple symptoms to appear. A single one of these is enough to call for help. A common and dangerous mistake is assuming someone will “sleep it off.” Blood alcohol concentration can continue rising for up to 40 minutes after the last drink, meaning a person can go from very drunk to critically ill after they have already stopped drinking and gone to sleep.
How Long Sobriety Actually Takes
A rough timeline helps set realistic expectations. At one standard drink cleared per hour, someone who had four drinks over two hours and stopped at midnight might not be fully sober until 3 or 4 a.m. Someone who had eight drinks at a party could still have alcohol in their system well into the next morning. BAC calculators can give a ballpark estimate, but they are imprecise because individual metabolism varies.
One standard drink is smaller than most people think: 12 ounces of regular beer, 5 ounces of wine, or 1.5 ounces of liquor. A strong cocktail or a large pour of wine can easily count as two or three standard drinks. This means the math often works out to a longer wait than expected. If someone had “a few drinks” at dinner, it is worth counting carefully before assuming they are safe to drive or be left alone.