There’s no instant cure for a hangover, but you can significantly shorten your misery and reduce symptom severity with the right combination of rehydration, food, rest, and pain relief. Most hangovers resolve within 24 hours on their own. The strategies below work by addressing the specific biological problems alcohol created overnight: inflammation, dehydration, low blood sugar, and poor sleep.
Why Hangovers Feel So Terrible
A hangover isn’t just “being dehydrated.” Alcohol triggers a genuine immune response. Your body ramps up production of inflammatory signaling molecules, the same ones involved in fighting infections, which directly cause the nausea, headache, fatigue, and diarrhea you feel the next morning. On top of that, your liver converts alcohol into a toxic byproduct called acetaldehyde, which lingers in your system and compounds the inflammation.
Alcohol also suppresses your body’s ability to produce glucose overnight. That’s why you wake up feeling weak, shaky, and mentally foggy. Your blood sugar is genuinely low. Meanwhile, even though you may have “slept” for hours, alcohol disrupts your deep sleep cycles, replacing restorative sleep with shallow, low-quality rest. So your brain never got the recovery it needed, which explains the mental haze and irritability.
Rehydrate, but Do It Right
Alcohol is a diuretic. You lost more fluid overnight than you normally would, and with it, electrolytes like sodium, potassium, and magnesium. Plain water helps, but it’s not enough on its own. Drink water alongside something that replaces electrolytes: a sports drink, coconut water, or even a glass of water with a pinch of salt and a squeeze of citrus. Aim to drink at least 16 to 24 ounces in the first hour after waking, then keep sipping steadily throughout the morning.
Avoid coffee right away if your stomach is already upset. Caffeine is also a diuretic and can worsen dehydration. If you need it for the headache, wait until you’ve had at least a couple glasses of water and some food first.
Eat Something, Even If You Don’t Want To
Your blood sugar is low, and eating is the fastest way to fix it. Bland, carbohydrate-rich foods like toast, crackers, rice, or bananas are easy on a nauseous stomach and will bring your glucose back up. If you can tolerate more, eggs are one of the best hangover foods. They’re rich in an amino acid called L-cysteine, which your body uses to neutralize acetaldehyde, the toxic alcohol byproduct responsible for much of your misery. L-cysteine also supports production of glutathione, your liver’s main antioxidant for processing alcohol. Studies have shown that L-cysteine reduces nausea, headache, fatigue, and anxiety after drinking.
Fruit juice or a smoothie with banana and berries can tackle both hydration and blood sugar at once. Broth or soup is another solid option, covering fluids, salt, and easy calories in a single bowl.
Choose the Right Pain Reliever
For a pounding headache, ibuprofen or aspirin are generally the safer choices over acetaminophen (Tylenol). Here’s why: alcohol depletes your liver’s supply of glutathione, which is the same molecule your liver needs to safely process acetaminophen. When glutathione is low, acetaminophen produces a toxic byproduct that can damage liver cells. The FDA specifically warns that people who have three or more drinks a day should not use acetaminophen. Even occasional heavy drinking followed by acetaminophen the next morning creates risk.
Ibuprofen and aspirin carry their own concern, since they can irritate an already upset stomach. Take them with food and water, not on an empty stomach.
Sleep More If You Can
Your body didn’t get real rest last night. Alcohol reduces deep, slow-wave sleep, the phase your brain relies on for memory consolidation and mental recovery, and replaces it with light, fragmented sleep. This is a major reason hangovers come with brain fog and poor concentration, not just physical symptoms. If your schedule allows it, going back to sleep (or at least resting in a dark, quiet room) after hydrating and eating gives your brain a chance at the restorative sleep it missed.
What Your Drink Choice Has to Do With It
Not all alcohol produces equal hangovers. Congeners are chemical byproducts of fermentation and aging that contribute to hangover severity. Dark liquors like bourbon, whiskey, and brandy are loaded with them. Red wine is also high in congeners. On the other end, vodka and gin have the lowest congener content of any spirits, and light beer is relatively low as well.
Per standard drink, wines tend to have the highest congener levels (48 to 145 mg), while distilled spirits sit at the low end (6 to 48 mg). This doesn’t mean clear drinks can’t cause hangovers. Drink enough of anything and you’ll feel it. But if you’re comparing equal amounts of alcohol, darker drinks consistently produce worse morning-after symptoms.
Supplements: What Works and What Doesn’t
Dihydromyricetin (DHM), derived from the Japanese raisin tree, is the active ingredient in many commercial hangover supplements. Animal research shows it reduces liver inflammation and helps restore normal fat metabolism after alcohol exposure, with significant reductions in inflammatory markers like TNF-alpha and IL-6. It’s a promising compound, but rigorous human clinical trials on hangover symptoms specifically are still limited. If you try a DHM supplement, the existing evidence suggests taking it before or during drinking, not the morning after.
N-acetylcysteine (NAC) is another popular supplement, and timing matters enormously here. In animal studies, NAC taken 30 minutes before alcohol protected the liver from damage by boosting antioxidant defenses. But NAC taken four hours after alcohol actually worsened liver damage in a dose-dependent way, acting as a pro-oxidant instead of an antioxidant. If you’re going to use NAC, it needs to be a preventive measure, not a morning-after remedy.
Korean pear juice showed a roughly 21% greater reduction in overall hangover severity compared to placebo in one study, but only when consumed before drinking started. Like most interventions, it works by speeding up alcohol metabolism and needs to be in your system before the alcohol arrives.
What to Do Before Your Next Night Out
The most effective hangover strategies are preventive. Eat a substantial meal before drinking, since food slows alcohol absorption dramatically. Alternate every alcoholic drink with a glass of water. Stick to lighter-colored drinks when possible. Set a pace: your liver processes roughly one standard drink per hour, and anything beyond that is accumulating in your bloodstream.
If you’re interested in supplements, the evidence points clearly toward taking them before you drink, not after. Both Korean pear juice and NAC showed benefits only with pre-drinking timing. By the time you wake up hungover, the window for these interventions has closed. At that point, your best tools are the basics: water, electrolytes, food, the right pain reliever, and time.