There is no way to significantly speed up how quickly your body processes alcohol. Your liver breaks down roughly one standard drink per hour, and nothing you do, whether it’s drinking coffee, taking a cold shower, or chugging water, changes that rate. If you’ve had five drinks, you’re looking at about five hours before the alcohol is fully out of your system.
That said, there are things you can do to feel more functional while you wait, and it helps to understand why the popular “tricks” don’t actually work.
Why Your Body Can’t Be Rushed
Your liver processes alcohol at a fixed, nearly constant rate. For most adults, that works out to about 0.5 ounces of pure alcohol per hour, which is equivalent to one 12-ounce beer (5% alcohol), one 5-ounce glass of wine (12%), or one 1.5-ounce shot of liquor (40%). Each of those contains roughly 14 grams of pure alcohol.
This rate doesn’t change based on your willpower, your tolerance, or how badly you need to be sober. The enzymes in your liver work at their own pace. If you’ve had four drinks in two hours, your blood alcohol concentration (BAC) is elevated and will take several more hours to return to zero, even after your last sip. A BAC of 0.08, the legal driving limit, takes roughly five to six hours to clear completely in someone who stopped drinking at that point.
Coffee Doesn’t Sober You Up
Caffeine is probably the most common thing people reach for, and the research is clear: it does not work. An FDA review of multiple human studies found that combining caffeine with alcohol had no significant effect on blood or breath alcohol concentration. Your BAC stays exactly the same whether you drink three cups of coffee or none.
What caffeine does do is make you feel more alert. And that’s actually the danger. Studies show that people who mix caffeine and alcohol report feeling less intoxicated while their motor coordination and reaction time remain just as impaired. You’re essentially a wide-awake drunk, which can lead to worse decisions because you overestimate how functional you are.
Cold Showers, Exercise, and Fresh Air
A cold shower will wake you up and might make you feel sharper for a few minutes. It has zero effect on your blood alcohol level. The same goes for exercise and fresh air. These can temporarily increase alertness, but your liver is still processing alcohol at the same fixed rate regardless of whether you’re jogging around the block or lying on the couch.
Cold showers carry an additional risk if someone is heavily intoxicated. Alcohol lowers your core body temperature, and cold water can push it lower, increasing the risk of hypothermia. For someone who’s seriously drunk, this can be genuinely dangerous.
Does Eating Help?
This one is more nuanced. Eating before or while you drink slows alcohol absorption, which means your BAC peaks lower and your liver has more time to keep up. That’s genuinely useful, but it’s a preventive measure, not a cure after the fact.
Eating after you’ve already been drinking is less effective because most of the alcohol has already been absorbed into your bloodstream. Some research suggests food may slightly increase the rate of alcohol elimination, but the effect is modest. A greasy meal at 2 a.m. might settle your stomach and give your body some fuel, but it won’t meaningfully speed up sobering.
IV Fluids Don’t Speed Things Up Either
Even in a medical setting, intravenous fluids don’t accelerate alcohol clearance. A clinical study that measured BAC in patients receiving IV saline versus no fluids found no difference in how fast alcohol left the bloodstream. The clearance rate was about the same in both groups. Doctors may give IV fluids to treat dehydration or low blood sugar, but not because it helps you sober up faster.
What Actually Helps While You Wait
Since time is the only real solution, the goal is to keep yourself safe and comfortable while your liver does its work.
- Water: Alcohol is a diuretic, so you’re losing fluids. Drinking water won’t lower your BAC, but it can reduce headache, nausea, and the severity of a hangover. Alternating water with alcoholic drinks is even better as a preventive step.
- Food: A snack with carbohydrates and protein can help stabilize blood sugar, which alcohol tends to drop. This can reduce shakiness and fatigue.
- Sleep: Your liver continues to metabolize alcohol while you sleep. If you can safely go to bed, your body will do the work overnight. Just be aware that alcohol disrupts sleep quality, so you may not feel fully rested.
- Stop drinking: This sounds obvious, but every additional drink resets the clock. If you stop at midnight after four drinks, you’re likely clear by around 4 a.m. If you have one more at 1 a.m., you’ve pushed that timeline out further.
Your Body Has Its Own Sobering Hormone
Your liver does more than just break down alcohol. It also releases a hormone that helps counteract intoxication by activating a brain region that controls arousal and alertness. In animal studies published in Cell Metabolism, this hormone reduced the time it took to recover from alcohol-induced unconsciousness and loss of coordination. Interestingly, it didn’t change how fast the alcohol itself was metabolized. It worked specifically by helping the brain recover its function even while alcohol was still present, and it only worked for alcohol, not other sedatives.
This is still early science with no practical application yet for someone trying to sober up on a Saturday night. But it does reveal that the body has a built-in defense system against intoxication that goes beyond just metabolizing the alcohol.
Signs That Need Emergency Attention
Sometimes the issue isn’t how to sober up but whether someone is in danger. Alcohol poisoning kills, and the symptoms can look like someone who’s “just really drunk.” Call emergency services if you see any of these:
- Slow or irregular breathing: fewer than eight breaths per minute, or gaps of more than 10 seconds between breaths
- Seizures
- Skin that looks blue, gray, or unusually pale
- Vomiting while unconscious or semi-conscious
- Inability to wake up or stay awake
- Low body temperature (skin feels cold and clammy)
A person who has passed out from alcohol and cannot be woken up is in a medical emergency. Do not assume they’ll “sleep it off.” Alcohol levels can continue rising after someone stops drinking because the stomach is still absorbing what’s already there.