There is no instant cure for a hangover. Once symptoms set in, your body needs time to clear the toxic byproducts of alcohol, and that process typically takes about 12 hours from when you wake up. What you can do is ease the worst symptoms and avoid making things harder on your body while it recovers.
Why Hangovers Happen in the First Place
Understanding what’s actually going on inside you helps explain why certain remedies work and others don’t. When you drink, your liver converts alcohol into a compound called acetaldehyde, which is significantly more toxic than alcohol itself. Acetaldehyde binds to proteins in your cells, damaging their structure and disrupting normal metabolism. Your liver then converts acetaldehyde into harmless acetate, but this two-step process can’t keep up when you drink heavily.
While your liver works overtime, alcohol triggers a cascade of inflammation throughout your body. It activates immune pathways that flood your system with inflammatory molecules, the same ones your body produces when you’re fighting an infection. That’s why a hangover can feel so much like being sick: the headache, body aches, nausea, and brain fog are largely driven by this inflammatory response. Alcohol also irritates your gut lining, disrupts your sleep architecture (even if you passed out for eight hours), and acts as a diuretic that leaves you dehydrated.
Rehydration Is Your First Priority
Alcohol suppresses a hormone that helps your kidneys retain water, which is why you urinate so frequently while drinking. By morning, you’re often significantly dehydrated, and that alone accounts for much of the headache and fatigue. Start drinking water or an electrolyte beverage as soon as you wake up. Sports drinks, coconut water, or even broth can help replace lost sodium and potassium faster than water alone. Sip steadily rather than chugging, especially if you’re nauseous.
Eat Something, Even If You Don’t Want To
Drinking lowers your blood sugar, and many people skip meals while they drink, which compounds the problem. Some of the fatigue and mental fogginess of a hangover comes from your brain running low on its primary fuel. Toast and juice is a classic recommendation because it gently brings blood sugar back up without overwhelming a sensitive stomach. Bananas, oatmeal, or crackers work similarly.
Eggs are a popular hangover food for a reason beyond tradition. They contain L-cysteine, an amino acid that researchers hypothesized could help your liver neutralize acetaldehyde. A small study tested this idea with L-cysteine supplements, and while participants did report feeling somewhat better, their bodies processed alcohol at the same rate whether they took L-cysteine or a placebo. So eggs are a solid, easy-to-digest food choice for recovery, but they aren’t a biochemical shortcut.
Pain Relievers: Choose Carefully
Reaching for a painkiller is tempting, but your choice matters. Acetaminophen (Tylenol) and alcohol are both processed by the liver using the same protective molecule called glutathione. Heavy drinking depletes your liver’s glutathione stores, and adding acetaminophen on top of that can allow toxic byproducts to accumulate. The biggest risk of combining alcohol and acetaminophen is liver damage, and in severe cases, liver failure.
Anti-inflammatory painkillers like ibuprofen (Advil) or aspirin are generally a safer option for hangover headaches because they target the inflammation driving your symptoms. The trade-off is that these can irritate an already-upset stomach, so take them with food rather than on an empty stomach.
What Doesn’t Work
“Hair of the dog,” or drinking more alcohol the next morning, is one of the most persistent hangover myths. It does temporarily mask symptoms by putting alcohol back into your system, but it doesn’t cure anything. It postpones the hangover and adds more toxic acetaldehyde for your liver to process later. You’re essentially borrowing against a worse afternoon.
Coffee can help with grogginess and may ease a caffeine-withdrawal headache if you’re a regular coffee drinker, but it won’t speed up alcohol metabolism. It’s also a mild diuretic, so it can work against your rehydration efforts if you rely on it too heavily.
IV drip bars, activated charcoal, and most supplements marketed as hangover cures lack strong clinical evidence. Some contain B vitamins and electrolytes that can help with general recovery, but none of them neutralize acetaldehyde or reverse inflammation in a meaningful way once symptoms have started.
Your Drink Choice Affects Severity
Not all alcohol punishes you equally. Darker drinks like bourbon, red wine, brandy, and whiskey contain higher levels of congeners, which are chemical byproducts of fermentation that give these drinks their color and flavor. Research published in Alcohol and Alcoholism confirmed that high-congener drinks produce more severe hangovers, and it takes fewer of them to trigger one. Vodka, gin, and other clear spirits have the lowest congener levels. This doesn’t make them hangover-proof, but switching to lighter-colored drinks can reduce symptom severity the next day.
How Long a Hangover Actually Lasts
Hangover symptoms begin as your blood alcohol level drops toward zero, which is why you often feel fine when you stop drinking but miserable the next morning. From the time you stop drinking, the average hangover lasts about 18 hours, with most people falling in a range of 14 to 23 hours. From the time you wake up, you’re looking at roughly 12 hours before symptoms fully resolve. Severity peaks in the first few hours after waking and gradually tapers.
The most effective strategy is a combination of water, food, rest, and time. Sleep is genuinely restorative here because alcohol disrupts your sleep cycles, leaving you sleep-deprived on top of everything else. If you can nap, do it. Your body is running a cleanup operation, and the less you demand of it while that’s happening, the faster you’ll feel human again.
Prevention Works Better Than Any Cure
Since no remedy can truly “cure” a hangover once it starts, prevention is worth more than every recovery trick combined. Eating a full meal before drinking slows alcohol absorption. Alternating alcoholic drinks with water reduces total alcohol intake and keeps you hydrated. Sticking to lighter-colored drinks minimizes congener exposure. And pacing yourself, one drink per hour gives your liver a fighting chance to keep up with acetaldehyde production, is the single most effective thing you can do to avoid the morning after entirely.