The fastest way to relieve a hangover is to rehydrate with an electrolyte-rich drink, eat simple carbohydrates, and rest. Most hangover symptoms begin six to eight hours after drinking, when your blood alcohol level drops sharply, and ease up within eight to 24 hours. There’s no instant cure, but the right combination of fluids, food, sleep, and timing can meaningfully shorten your misery.
Why You Feel This Bad
A hangover isn’t just dehydration, though that’s part of it. Alcohol triggers a genuine inflammatory response in your body. As your liver breaks down ethanol, it produces byproducts that your immune system treats as foreign invaders. Your body responds by flooding your bloodstream with inflammatory signaling molecules, the same ones involved in fighting infections. Higher levels of these molecules correlate directly with worse hangover symptoms the next day.
That inflammation explains why a hangover feels like being sick: headache, body aches, nausea, brain fog. Alcohol also irritates your stomach lining, suppresses a hormone that helps your kidneys retain water (which is why you urinate so much while drinking), and disrupts your sleep in ways you probably didn’t notice.
Why You’re Tired Even After Sleeping
Alcohol changes the structure of your sleep in a specific, lopsided way. During the first half of the night, it pushes you into unusually deep sleep while suppressing the dream-stage sleep (REM) your brain needs for restoration. Then in the second half of the night, the pattern collapses. You wake up more often, your sleep becomes shallow, and your body fails to compensate for the REM it lost earlier. The result is that even seven or eight hours in bed leaves you feeling unrested, because the quality of that sleep was poor from start to finish.
Rehydrate With More Than Water
Water helps, but it’s not the most efficient option. When you drink alcohol, you lose both fluid and electrolytes, particularly sodium and potassium. Plain water replaces the fluid but not the electrolytes, and without enough sodium your kidneys simply flush out much of what you just drank.
Oral rehydration solutions like Pedialyte contain a precise ratio of sugar, salt, and water designed to pull fluid into your bloodstream faster than water alone. The lower sugar content speeds absorption, while the sodium helps your body actually retain that fluid. Sports drinks work in a pinch, though they typically contain more sugar than is ideal for absorption. Coconut water is another decent option since it’s naturally high in potassium.
Start drinking fluids as soon as you wake up, and sip steadily rather than chugging large amounts at once. If you’re nauseous, small frequent sips are easier to keep down.
What to Eat (and When)
Your blood sugar drops after heavy drinking, which contributes to shakiness, fatigue, and irritability. Eating helps, but your stomach is likely inflamed, so the goal is gentle foods that stabilize blood sugar without making nausea worse.
The classic BRAT foods (bananas, rice, applesauce, toast) are a solid starting point. They’re bland enough to sit well in an irritated stomach and contain carbohydrates that bring your blood sugar back up. Bananas pull double duty because they’re rich in potassium, one of the key electrolytes you’ve lost.
Ginger is one of the few foods with genuine evidence for reducing nausea. Ginger tea, dried ginger, or fresh ginger grated into a smoothie can help settle your stomach enough to eat something more substantial. Fruits like watermelon, oranges, grapes, and mangoes provide natural sugars and water content. There’s some evidence that the fructose in honey and fresh fruit helps your body process residual alcohol faster.
Greasy “hangover food” is popular but often backfires. A heavy, fatty meal can worsen nausea and digestive discomfort when your stomach lining is already irritated. Save the bacon cheeseburger for later in the day when your stomach has calmed down.
Pain Relief: Choose Carefully
Reaching for a painkiller is instinctive, but the two most common options both carry real risks when alcohol is still being processed by your body.
Acetaminophen (Tylenol) is the more dangerous choice. It’s processed by the same liver pathways that are already working overtime to clear alcohol, and combining the two significantly increases the risk of liver damage. This isn’t a theoretical concern; it’s a well-established contraindication.
Ibuprofen (Advil, Motrin) seems like the safer alternative, but research shows it can also amplify liver stress when combined with alcohol. The two together produce more oxidative damage than either one alone. Ibuprofen also irritates the stomach lining, which alcohol has already inflamed.
If your headache is severe, a small dose of ibuprofen taken with food and water is generally the lesser risk compared to acetaminophen. But if you can manage without either, your liver will thank you. A cold compress on your forehead or the back of your neck can take the edge off a headache without adding chemical stress.
Sleep and Rest
Since alcohol wrecked the second half of your night, more sleep is one of the most effective things you can do. A nap of even 20 to 90 minutes gives your brain a chance to get some of the restorative sleep it missed. Keep the room dark and cool. If you can sleep longer, let yourself. Your body is running an inflammatory response and processing toxins; rest accelerates both.
What Doesn’t Work
“Hair of the dog,” or drinking more alcohol, delays hangover symptoms rather than resolving them. You’re simply restarting the cycle and will feel worse later. Coffee can help with grogginess and caffeine-withdrawal headaches, but it’s a diuretic that can worsen dehydration if you’re not drinking water alongside it.
IV hydration clinics have become trendy, but there’s no strong evidence they work better than drinking electrolyte solutions by mouth. They also carry real risks: infection at the injection site, vein irritation, and the unnecessary use of medical supplies. Your gut absorbs fluids effectively; you don’t need a needle for a hangover.
Supplements marketed as hangover cures are mostly unproven. Dihydromyricetin (DHM), a compound found in the Japanese raisin tree, has shown promising results in animal studies. Rats given DHM recovered from alcohol intoxication significantly faster. But these findings haven’t been replicated in rigorous human clinical trials, so the supplement aisle’s promises are ahead of the science.
Reducing Severity Next Time
The single biggest factor in hangover severity is how much alcohol you drink. That’s obvious but worth stating, because research confirms that blood alcohol concentration has a stronger effect on next-day misery than any other variable.
What you drink matters somewhat. Darker liquors like bourbon, red wine, and brandy contain higher levels of congeners, chemical byproducts of fermentation that worsen hangovers. Vodka has essentially no congeners and produces less severe hangovers at the same alcohol dose. That said, the ethanol itself is still the primary driver of symptoms, so switching to clear spirits while drinking the same amount won’t save you.
Alternating alcoholic drinks with water slows your intake and reduces total dehydration. Eating a substantial meal before drinking slows alcohol absorption into your bloodstream, which lowers your peak blood alcohol level and gives your liver more time to keep up. These strategies won’t eliminate a hangover after heavy drinking, but they can meaningfully reduce how rough the next morning feels.