There is no true cure for a hangover. No pill, supplement, or home remedy has been proven to eliminate hangover symptoms entirely, and the FDA has not approved any product as a hangover cure. What you can do is manage the specific symptoms, support your body’s recovery process, and shorten the time you feel miserable. Here’s what actually works, what doesn’t, and why.
Why Hangovers Happen
Understanding what’s going on inside your body helps explain why certain remedies work and others are useless. A hangover isn’t just one problem. It’s several overlapping ones hitting you at the same time.
When your liver processes alcohol, it first converts it into a toxic intermediate called acetaldehyde before breaking that down further into harmless acetate. Acetaldehyde is reactive and irritating. At higher concentrations, it causes rapid pulse, sweating, nausea, and flushing. Some people carry genetic variants that slow the second step of this breakdown, which is why they feel terrible after even small amounts of alcohol.
Alcohol also suppresses a hormone that tells your kidneys to conserve water. The result: drinking roughly four standard drinks causes your body to produce 600 to 1,000 mL of extra urine over several hours. That’s up to a full quart of water lost beyond what you’d normally excrete. Add in sweating, vomiting, or diarrhea, and you’re looking at significant fluid and electrolyte loss. That’s where the thirst, dizziness, weakness, and lightheadedness come from.
On top of all that, alcohol directly inflames your stomach lining, delays stomach emptying, widens blood vessels (contributing to headaches), and disrupts neurotransmitters involved in pain signaling. Hangover symptoms typically peak as your blood alcohol concentration approaches zero, which is why you often feel worst in the morning rather than while you’re still drinking.
Rehydration Is the First Priority
Because alcohol forces your body to expel far more water than you’re taking in, replacing lost fluids is the single most effective thing you can do. Water works, but drinks containing electrolytes (sodium, potassium, magnesium) are better because you’ve lost those too. Sports drinks, coconut water, or oral rehydration solutions all fit the bill. Broth or soup serves double duty by delivering both fluids and sodium.
Don’t try to chug a liter at once, especially if you’re nauseous. Steady sipping over a few hours is easier on your irritated stomach and allows your body to absorb the fluid rather than sending it straight through.
What to Eat When You Feel Terrible
Eating may be the last thing you want to do, but food helps in several ways. Bland carbohydrates like toast, crackers, or rice are gentle on an inflamed stomach and help stabilize blood sugar, which alcohol can lower. Bananas are a good source of potassium, one of the electrolytes you’ve lost.
Eggs are a particularly smart choice. They’re rich in an amino acid called L-cysteine, which reacts directly with acetaldehyde, the toxic byproduct your liver is still working to clear. Research from the University of Helsinki confirmed that L-cysteine helps alleviate hangover symptoms through this mechanism. You don’t need a supplement for this. A plate of scrambled eggs delivers it naturally alongside protein and fats that slow digestion and help you feel more stable.
Pain Relief: Choose Carefully
A pounding headache is one of the most common hangover complaints, and reaching for a painkiller is a natural response. But your choice matters.
Ibuprofen or aspirin can help with headache and body aches, though both can further irritate an already inflamed stomach lining. Taking them with food reduces this risk. Acetaminophen (Tylenol) is the one to avoid. Your liver processes both alcohol and acetaminophen, and clinical research shows that taking acetaminophen shortly after your body clears alcohol can increase the risk of liver damage. This risk is especially pronounced in people who drink regularly. If you’ve been drinking heavily the night before, skip the acetaminophen entirely.
Sleep More Than You Think You Need
Alcohol wrecks your sleep even when you feel like you passed out cold. It suppresses REM sleep, particularly in the first half of the night, and then fragments your sleep in the second half with increased wakefulness and lighter sleep stages. You may have been in bed for eight hours, but the quality of that sleep was poor.
This is why you still feel exhausted the morning after. If your schedule allows it, going back to sleep or napping later in the day gives your brain a chance to get the restorative sleep it missed. Rest also gives your liver more time to finish clearing acetaldehyde without you adding new demands on your body.
What About Supplements and “Hangover Cures”?
The market is flooded with products claiming to cure or prevent hangovers. The FDA has sent warning letters to companies selling these products, stating that they are “unapproved new drugs” that have “not been evaluated by the FDA to be safe and effective for their intended use.” No supplement on the market has been proven to reliably cure a hangover.
That said, some individual ingredients show modest promise in small studies. Red ginseng lowered blood alcohol levels and reduced hangover severity in a randomized crossover study of 25 healthy men, with participants showing significantly lower blood alcohol concentrations 30 to 60 minutes after drinking. But a study of 25 people is far from definitive, and the effect was on severity, not elimination. Ginger may help with nausea based on its established anti-nausea properties, though hangover-specific evidence is limited.
The honest takeaway: no supplement replaces hydration, food, rest, and time. If a product sounds too good to be true, it is.
Prevention Works Better Than Any Cure
Since there’s no reliable way to erase a hangover once it starts, your best tools are the ones you use before and during drinking.
- Eat before and while drinking. Food slows alcohol absorption, giving your liver more time to process each drink before the next one arrives.
- Alternate with water. One glass of water between each alcoholic drink offsets some of the fluid loss happening in real time.
- Choose lighter-colored drinks. Congeners, the complex organic byproducts of fermentation, make hangovers worse. Bourbon contains 37 times the congeners of vodka. A controlled study confirmed that bourbon produced significantly more hangover symptoms than vodka at the same alcohol dose. In general, darker spirits (whiskey, brandy, red wine) carry more congeners than lighter ones (vodka, gin, white wine).
- Pace yourself. Your liver processes roughly one standard drink per hour. Drinking faster than that means acetaldehyde accumulates faster than your body can clear it.
How Long a Hangover Actually Lasts
Most hangovers resolve within 24 hours, with symptoms peaking as blood alcohol drops to zero and gradually improving from there. For heavy drinking episodes, some people report lingering fatigue, brain fog, or stomach upset into the second day. There’s no way to speed the timeline dramatically. Your liver works at a fixed pace, and the inflammatory response in your gut and blood vessels takes time to calm down.
If you experience hangover symptoms that last more than 72 hours, or if you notice confusion, seizures, repeated vomiting, or inability to keep fluids down, that’s no longer a typical hangover. Those symptoms can indicate alcohol poisoning or withdrawal, both of which require medical attention.