The most reliable way to prevent a hangover is to drink less, but several evidence-based strategies can meaningfully reduce how rough you feel the next morning. Hangovers result from a combination of dehydration, inflammation, poor sleep, and the buildup of toxic byproducts your liver has to process. Targeting each of these factors before and during drinking gives you the best shot at waking up functional.
Eat Before You Drink
Food in your stomach slows the rate at which alcohol reaches your small intestine, where most absorption happens. This prevents the sharp spike in blood alcohol that overwhelms your liver and makes hangover symptoms worse. Eating before and during drinking increases the rate your body clears alcohol from the bloodstream by 25 to 45 percent, according to data from Johns Hopkins University.
The best options combine protein, fat, and carbohydrates. A meal with eggs, avocado, and toast, or a burger before heading out, checks all three boxes. Fat is especially useful because it slows stomach emptying. Drinking on an empty stomach is one of the single biggest risk factors for a severe hangover, and it’s the easiest one to control.
Choose Lighter-Colored Drinks
Not all alcoholic drinks produce the same hangover. Dark liquors like bourbon, brandy, cognac, and red wine contain high levels of congeners, chemical byproducts created during fermentation and aging. These compounds contribute directly to next-day misery: headaches, nausea, and general malaise.
Clear drinks have significantly fewer congeners. Vodka, gin, light rum, white wine, sake, and light beers are your better options if you’re trying to minimize the aftermath. This doesn’t mean clear drinks are hangover-proof, but choosing them over dark spirits removes one aggravating factor from the equation.
Pace Yourself and Alternate With Water
Your liver processes roughly one standard drink per hour. Anything faster than that creates a backlog of acetaldehyde, the toxic intermediate compound your body produces when breaking down alcohol. Acetaldehyde is directly responsible for many hangover symptoms, including nausea, flushing, and headache.
Alternating every alcoholic drink with a glass of water serves two purposes. It physically slows your drinking pace, and it counteracts the dehydration that alcohol causes. Alcohol suppresses a hormone that tells your kidneys to retain water, so you lose significantly more fluid than you take in. Matching each drink with water won’t eliminate dehydration entirely, but it limits the deficit. Adding an electrolyte drink before bed helps even more, since you lose sodium and potassium along with that extra fluid.
Why Hangovers Involve Inflammation
A hangover isn’t just dehydration. Moderate to heavy alcohol consumption triggers a genuine inflammatory response throughout your body. Blood levels of inflammatory markers, including C-reactive protein and compounds called cytokines, rise measurably during a hangover. This is the same type of inflammation your body mounts when fighting an infection, which explains why a bad hangover can feel like coming down with the flu.
Alcohol also damages the lining of your gut, weakening the barrier that normally keeps bacteria and toxins contained. When that barrier becomes “leaky,” immune-activating substances escape into the bloodstream. Through the connection between your gut and brain, this inflammatory cascade contributes to the brain fog, fatigue, and mood changes that define a hangover. People who get frequent, severe hangovers may be experiencing repeated rounds of this inflammatory damage, which some researchers believe could contribute to longer-term health problems.
Be Careful With Pain Relievers
Reaching for a pill before bed or first thing in the morning seems logical, but the wrong choice can cause real harm. Acetaminophen (Tylenol) and alcohol both rely on the same protective substance in your liver, called glutathione, to neutralize their toxic byproducts. Heavy or regular drinking depletes your glutathione stores, which means the toxic metabolite from acetaminophen can accumulate and damage your liver.
For people who drink heavily or binge drink, Cleveland Clinic recommends keeping acetaminophen doses under 2,000 mg per day, which is half the standard daily maximum. If you only drink occasionally, a normal dose is generally considered safe, but ibuprofen or aspirin are better post-drinking options for most people since they target the inflammatory component of a hangover directly. Take them with food, though, because alcohol already irritates your stomach lining and anti-inflammatory pain relievers can make that worse.
How Alcohol Wrecks Your Sleep
Alcohol might help you fall asleep faster, but the sleep you get is significantly lower quality. During the first half of the night, alcohol suppresses REM sleep, which is the restorative phase your brain needs for memory consolidation and emotional regulation. During the second half of the night, as your blood alcohol drops, your sleep fragments. You wake up more often, cycle between sleep stages erratically, and lose the deep rest that would otherwise help your body recover.
This is why you can sleep eight hours after drinking and still feel exhausted. A few strategies help: stop drinking at least two to three hours before bed to give your body time to process some of the alcohol, keep your room cool and dark, and avoid the temptation to stay up much later than your normal bedtime. The combination of alcohol-disrupted sleep and a shortened sleep window makes everything worse.
What to Do Before Bed
The window between your last drink and falling asleep is your best opportunity to limit tomorrow’s damage. Drink 16 to 24 ounces of water, ideally with electrolytes. Eat a small snack if you can, something bland with carbohydrates like toast or crackers, which helps stabilize blood sugar overnight. Alcohol interferes with your liver’s ability to release glucose steadily, and the resulting low blood sugar contributes to the shakiness and weakness you feel in the morning.
Keep another glass of water on your nightstand. You’ll likely wake up during the night (alcohol fragments sleep in the second half), and drinking water each time you wake helps offset ongoing fluid loss.
The Only Guaranteed Prevention
Every strategy above reduces hangover severity, but none eliminates it entirely once you’ve had enough to drink. The dose matters more than anything else. Staying under three or four drinks over the course of an evening, with food and water throughout, is the threshold where most people can avoid significant next-day symptoms. Beyond that, you’re managing damage rather than preventing it.