There’s no instant cure for a hangover, but you can shorten and ease the worst of it by targeting what’s actually going wrong in your body: dehydration, low blood sugar, inflammation, and the lingering effects of toxic alcohol byproducts. The average hangover lasts about 18 hours after your last drink, or roughly 12 hours after waking up. That timeline isn’t fixed. The right combination of fluids, food, rest, and timing can pull you toward the shorter end.
Why You Feel This Bad
Hangover symptoms begin as your blood alcohol concentration drops toward zero, not while you’re still drinking. By the time you wake up feeling terrible, your body has already processed most of the alcohol itself, but the damage is done. Alcohol suppresses a hormone that helps your kidneys retain water, so you’ve been losing fluids all night. It irritates your stomach lining, disrupts your sleep cycles, and triggers an inflammatory response throughout your body.
The real villain behind the worst symptoms is acetaldehyde, a toxic byproduct your liver produces while breaking down alcohol. Your body eventually converts it into harmless acetic acid, but that process takes time, and acetaldehyde is 10 to 30 times more toxic than alcohol itself. It’s responsible for much of the nausea, headache, and general misery.
Darker liquors like bourbon, scotch, and red wine contain higher levels of compounds called congeners, which are byproducts of fermentation that contribute to flavor and color. These congeners can worsen hangover symptoms compared to clearer spirits like vodka or gin. If you’re already dealing with a rough morning, knowing this won’t help today, but it’s worth remembering next time.
Rehydrate With More Than Water
Water is a good start, but it’s not enough on its own. Alcohol flushes electrolytes like sodium and potassium along with all that lost fluid, and plain water doesn’t replace them. Drink an electrolyte beverage, broth, or coconut water alongside regular water. Broth is especially useful because it replaces sodium and is gentle on an upset stomach.
Sip steadily rather than chugging. Your stomach is already irritated, and flooding it with a large volume of anything can trigger nausea. Aim for small, frequent amounts over the first few hours after waking. If you can keep fluids down consistently, you don’t need anything more aggressive. The University of Rochester Medical Center notes that IV fluids are only recommended when a patient genuinely cannot keep water down, and they require bloodwork first because they can actually be risky for some people. Save your money on trendy hangover IV drips.
Eat the Right Foods Early
Alcohol interferes with your liver’s ability to release stored glucose, which is why you wake up shaky, foggy, and weak. Eating carbohydrate-rich foods helps restore blood sugar and gives your body fuel to keep working through the recovery process. The classic approach works well here: bananas, rice, applesauce, and toast. These are bland enough to stay down and starchy enough to raise blood sugar without spiking it dramatically.
Bananas deserve special mention because they’re rich in potassium, one of the electrolytes you’ve lost overnight. Eggs are another strong choice. They contain an amino acid called L-cysteine, which plays a role in helping your body process acetaldehyde. Animal research has shown that L-cysteine can significantly boost the enzyme activity your liver uses to break down that toxic byproduct, reducing acetaldehyde levels in the blood. Supplements combining L-cysteine with other antioxidants have been reported to improve hangover symptoms like nausea, anxiety, and headaches, though human studies are still limited.
If you can manage something more substantial, a combination of eggs, toast, and a banana covers hydration support, blood sugar recovery, and acetaldehyde processing in a single meal.
Coffee: Helpful but Limited
A cup of coffee can help with one specific hangover symptom: the headache. Caffeine narrows blood vessels, which counteracts the swelling and increased blood flow around the brain that causes headache pain. That vasoconstrictive effect is real and fast-acting.
The tradeoff is that caffeine is a mild diuretic, meaning it can contribute to the dehydration you’re already fighting. One cup is fine, especially if you drink coffee regularly and skipping it would give you a withdrawal headache on top of everything else. Just match it with extra water. Avoid energy drinks, which pile on sugar and other stimulants your body doesn’t need right now.
Sleep and Rest Do the Heavy Lifting
Alcohol fragments your sleep architecture, reducing the restorative deep sleep your brain needs. Even if you slept for eight hours, you likely didn’t get quality rest. Going back to sleep, or at least lying down in a dark, quiet room, gives your body the recovery time that no supplement can replace. Your liver clears acetaldehyde at a fixed rate. You can support the process, but you can’t meaningfully speed it up. Rest lets your body focus its energy on that work.
If you can, nap for 60 to 90 minutes after eating and hydrating. Many people find their symptoms feel dramatically better when they wake up, partly because time has passed and partly because even a short stretch of better-quality sleep helps.
Over-the-Counter Pain Relief
Ibuprofen can reduce the headache and body aches that come with a hangover by targeting the inflammatory response alcohol triggers. Take it with food to protect your already-irritated stomach lining. Avoid acetaminophen (Tylenol) when you’re hungover. Your liver is already working overtime processing alcohol byproducts, and acetaminophen adds additional strain to the same metabolic pathway, increasing the risk of liver damage.
What Doesn’t Actually Work
“Hair of the dog,” or drinking more alcohol the next morning, delays your hangover rather than curing it. You’re simply raising your blood alcohol level again, which temporarily masks symptoms. When it wears off, the hangover returns, often worse because you’ve added more alcohol for your liver to process.
As for the many branded hangover supplements on the market, a systematic review from King’s College London found no convincing scientific evidence that any of them work. The studies that did show improvement were low quality, had imprecise measurements, and none of the results have been independently replicated. No two studies even tested the same remedy. That doesn’t mean every ingredient in these products is useless, but the specific formulations being sold haven’t proven themselves.
A Practical Recovery Timeline
Here’s a realistic schedule for the morning after heavy drinking:
- Immediately on waking: Drink 16 ounces of water or an electrolyte drink. Take ibuprofen with a few crackers if your headache is severe.
- Within 30 to 45 minutes: Eat a simple meal. Eggs, toast, and a banana is close to ideal. Have a cup of coffee if that’s part of your routine.
- First two hours: Continue sipping fluids. Rest or nap if possible.
- By midday: Eat another meal with protein and complex carbohydrates. Your blood sugar should be stabilizing and nausea subsiding.
Most people feel significantly better by early afternoon if they hydrate and eat consistently. For the average hangover, you’re looking at about 12 hours of noticeable symptoms after waking up. Hitting the fundamentals (fluids, electrolytes, food, rest, and mild anti-inflammatory pain relief) won’t erase those hours entirely, but it can make the difference between being miserable until evening and feeling functional by lunch.