There’s no instant cure for a hangover, but you can shorten the misery and feel noticeably better within a few hours by targeting the right symptoms. Most hangover relief comes down to four things: rehydrating, eating the right foods, managing pain safely, and getting more sleep. Here’s what actually works, what doesn’t, and what’s happening inside your body.
Why You Feel This Bad
The main driver of hangover misery isn’t dehydration, as most people assume. It’s inflammation. As your liver breaks down alcohol, it triggers a surge of inflammatory molecules in the blood. People with higher levels of these inflammatory markers experience worse hangovers regardless of how much water they drank. That’s why a hangover can feel like the flu: headache, body aches, nausea, and brain fog all stem from the same inflammatory process.
Dehydration does play a role, but a smaller one than you’d think. Alcohol increases urine production, yet the total fluid loss typically amounts to only 2 to 3 percent of your body water. That’s enough to cause a headache and dry mouth, but it’s not the whole picture. Your blood sugar also drops overnight because alcohol interferes with your liver’s ability to release stored glucose, which contributes to shakiness, fatigue, and difficulty concentrating the next morning.
Hangover symptoms peak once your blood alcohol level returns to zero, not while you’re still drunk. They can last 24 hours or longer depending on how much you drank.
Hydrate, but Don’t Overdo It
Drinking water and electrolytes helps, but it won’t erase your hangover. A 2023 study found that electrolyte supplementation reduced hangover severity by only about 8 to 12 percent. That’s real but modest. Still, even a small improvement matters when you’re suffering.
Your best approach is steady sipping rather than chugging a liter at once, which can worsen nausea. A simple homemade electrolyte drink works as well as expensive products: mix a quarter teaspoon of salt and a couple ounces of orange juice into 16 ounces of water. The salt replaces sodium, the juice adds potassium, and the water handles basic rehydration. Sports drinks, coconut water, or broth all accomplish the same thing. For a hangover from a moderate night of drinking (two to four drinks), plain water is usually enough.
Eat Something, Especially Carbs
Alcohol suppresses your liver’s ability to regulate blood sugar overnight, leaving you with low glucose levels the next morning. This is a big part of the weakness, shakiness, and mental fog you’re feeling. Eating carbohydrate-rich foods like toast, crackers, bananas, or oatmeal helps bring your blood sugar back up relatively quickly.
If you’re too nauseous for a full meal, start small. A few crackers or a piece of fruit is enough to begin stabilizing your energy. Bland, starchy foods are easier on your stomach than anything greasy or acidic. Despite the popularity of greasy breakfast foods as a hangover “cure,” fatty meals can irritate an already sensitive stomach and slow digestion.
Choose Your Pain Reliever Carefully
If you’re reaching for something for your headache, the choice matters. Acetaminophen (Tylenol) is risky after heavy drinking because both alcohol and acetaminophen are processed by the liver. Combining them increases the chance of liver damage, and acetaminophen overdose is the most common cause of acute liver failure.
Ibuprofen (Advil, Motrin) or naproxen (Aleve) are generally the safer choice for a hangover headache, since they also reduce the inflammation driving many of your symptoms. That said, these drugs can irritate the stomach lining, especially when combined with alcohol’s effects. Take them with food rather than on an empty stomach, and stick to the lowest effective dose.
Go Back to Sleep
Alcohol wrecks your sleep quality even when it seems to knock you out. It initially promotes deep sleep in the first half of the night, but as your body metabolizes the alcohol, a rebound effect kicks in. You wake up more frequently, spend less time in REM sleep (the restorative phase tied to mental recovery), and often wake up too early feeling wired but exhausted. This is called rebound insomnia, and it’s why you can sleep for eight hours after drinking and still feel like you barely slept at all.
If your schedule allows it, going back to sleep is one of the most effective hangover remedies available. Your body clears the remaining byproducts of alcohol metabolism faster during rest, and the additional sleep directly replaces what you lost overnight. Even a 90-minute nap (roughly one full sleep cycle) can make a noticeable difference in how you feel.
What Doesn’t Work
Drinking more alcohol the next morning, known as “hair of the dog,” does not cure a hangover. It temporarily delays symptoms by slowing down the metabolism of certain toxic byproducts, but the hangover returns later, often worse. Research shows that hangover severity actually increased in people who drank more alcohol the next day compared to those who didn’t. This habit is also a significant predictor of developing problem drinking over time.
Coffee is a mixed bag. Caffeine can help with the grogginess and may ease a headache if you’re a regular coffee drinker who’s experiencing caffeine withdrawal on top of the hangover. But it’s also a mild diuretic and can worsen nausea and stomach irritation. If you normally drink coffee, a small cup is fine. Don’t treat it as medicine.
Supplements marketed as hangover cures, including products containing dihydromyricetin (DHM), are still in early clinical testing. There isn’t strong published evidence yet showing they meaningfully reduce hangover symptoms in humans at any specific dose.
A Practical Recovery Timeline
If you follow the steps above, here’s roughly what to expect. Within the first hour of waking, focus on small sips of water or an electrolyte drink and a few bites of bland carbs. Take ibuprofen with food if your headache is significant. Within two to three hours, your blood sugar should stabilize and nausea typically begins to ease. By the four to six hour mark, most people with moderate hangovers feel substantially better, especially if they’ve managed to nap.
Severe hangovers from very heavy drinking can last a full 24 hours or more. There’s no way to speed up alcohol metabolism itself, which happens at a fixed rate in the liver. Everything above is about managing symptoms and supporting your body while it does the work.
When a Hangover Might Be Something Worse
Most hangovers are miserable but harmless. Alcohol poisoning is not. If someone is vomiting while unconscious, breathing fewer than 8 times per minute, having seizures, or has bluish or extremely pale skin, that’s a medical emergency. Confusion so severe the person can’t stay conscious, clammy skin, and gaps of 10 seconds or more between breaths are all signs the brain is losing control of basic functions. Alcohol suppresses the gag reflex at high levels, meaning someone who passes out and vomits can choke without waking up. Call emergency services immediately if you see any of these signs.