There is no instant cure for a hangover, but you can significantly reduce the severity and duration of symptoms with the right combination of rehydration, food, rest, and timing. The average hangover lasts about 18 hours from your last drink, or roughly 12 hours after waking up. Most of what you can do falls into two categories: helping your body clear the toxic byproducts of alcohol and replacing what alcohol depleted overnight.
Why Hangovers Happen in the First Place
When your liver breaks down alcohol, it produces a cascade of byproducts that trigger inflammation throughout your body. The process generates an excess of free radicals, unstable molecules that damage cells and set off an immune response. Your body reacts by releasing the same inflammatory signaling molecules it uses to fight infections, and the blood levels of these molecules directly correlate with how bad your hangover feels the next day.
At the same time, alcohol suppresses a hormone that tells your kidneys to retain water. The result is that you urinate far more than the volume of liquid you drank, losing electrolytes along the way. Your liver also deprioritizes blood sugar regulation while it processes alcohol, which is why you can wake up shaky, foggy, and weak even if you ate before bed. A hangover is essentially dehydration, low blood sugar, and a full-body inflammatory response happening simultaneously.
Rehydrate With More Than Just Water
Water helps, but it’s not the most efficient option. An oral rehydration solution, the kind used for dehydration from illness, retains about 22% more fluid in your body over four hours compared to plain water. That’s because the sodium and glucose in these solutions help your intestines absorb water faster. You don’t need a medical-grade product. A sports drink, coconut water, or even water with a pinch of salt and a splash of juice will work better than plain water alone.
Start drinking fluids as soon as you wake up and sip steadily rather than chugging a large amount at once. Your stomach is already irritated, and flooding it can trigger nausea. If plain water is all you have, it still helps considerably. Just know that adding some electrolytes speeds up the process.
What to Eat for Faster Recovery
Eggs are one of the best hangover foods for a specific reason: they’re rich in cysteine, an amino acid your body uses to produce glutathione, its primary antioxidant for breaking down alcohol’s toxic byproducts. Drinking depletes glutathione stores, and eating cysteine-rich foods helps rebuild them. Pair eggs with toast or oatmeal to address your blood sugar. Complex carbohydrates from oatmeal release sugar slowly and steadily, which is exactly what your body needs after a night of disrupted blood sugar regulation.
Oranges and other vitamin C-rich fruits also support glutathione levels and help counter the oxidative stress driving your symptoms. If you can stomach it, a meal combining protein, complex carbs, and fruit covers most of what your body is missing. Even bland crackers are useful if nausea makes a full meal impossible, since fast-acting carbohydrates raise blood sugar quickly and relieve the weakness and brain fog that come with it.
Over-the-Counter Pain Relief
Ibuprofen can help with headache and body aches, but take it with food. Alcohol irritates your stomach lining, and anti-inflammatory painkillers can make that worse on an empty stomach.
Avoid acetaminophen (Tylenol) while your body is still processing alcohol. Your liver uses the same pathways to break down both acetaminophen and alcohol, and combining them increases the risk of liver damage. The FDA specifically warns that people who drink three or more alcoholic beverages a day should talk to a doctor before taking acetaminophen. After a night of heavy drinking, your liver is already working overtime. Give it at least several hours after your last drink before reaching for acetaminophen, and even then, keep the dose low.
Why “Hair of the Dog” Makes Things Worse
Drinking more alcohol the next morning does temporarily relieve hangover symptoms. Research confirms this. The problem is that it works by restarting the cycle your body is trying to finish. Your brain adapts to the presence of alcohol, and when levels drop, withdrawal-like effects kick in. A morning drink delays those effects rather than resolving them, and it meaningfully increases your risk of developing alcohol dependency over time. You’re essentially trading a shorter hangover today for a longer recovery and a pattern that gets harder to break.
Your Drink Choice Matters
Not all alcohol produces the same hangover. Darker spirits like bourbon, brandy, and whiskey contain higher levels of congeners, chemical byproducts of fermentation that your body has to process alongside the alcohol itself. One well-known congener is methanol, which is found in the highest concentrations in red wine, brandy, and whiskey, and in the lowest concentrations in beer and vodka.
Studies have found that hangover severity scores are significantly higher after bourbon compared to the same amount of vodka, even when participants reach the same blood alcohol level. If you know you’re sensitive to hangovers, choosing lighter-colored, more filtered spirits reduces the total toxic load your body has to deal with. This won’t prevent a hangover from heavy drinking, but it can make the difference between a rough morning and a completely lost day.
Supplements: What the Evidence Shows
Dihydromyricetin (DHM), a compound derived from the Japanese raisin tree, is the active ingredient in many commercial hangover supplements. It has genuine antioxidant and anti-inflammatory properties, and animal studies show it can reduce alcohol-related liver inflammation and improve the function of enzymes that break down alcohol. However, rigorous human clinical trials on DHM for hangover relief are still limited, so the bold claims on supplement packaging outpace the current evidence.
The most reliable “supplement” approach is simpler: replace what alcohol depleted. That means electrolytes, B vitamins, vitamin C, and protein. A multivitamin and a solid breakfast will do more than most branded hangover pills.
The Realistic Recovery Timeline
For most people, hangover symptoms last 14 to 23 hours from the time they stop drinking, with an average of about 18 hours. Since your blood alcohol level typically reaches zero while you’re still asleep, the hangover clock is already running when you wake up. Most people feel substantially better by early to mid-afternoon if they stopped drinking at midnight, and nearly recovered by evening.
The peak of symptoms usually hits in the first few hours after waking. This is when dehydration, low blood sugar, and inflammation are all at their worst. Addressing all three immediately, with fluids, food, and rest, compresses the recovery window. You can’t eliminate the hangover entirely, but you can make the back half of it far more tolerable than the first hour suggested it would be.