Most hangovers last about 12 hours from the time you wake up, though the full cycle from your last drink to feeling normal again averages around 18 hours. There’s no instant cure, but several strategies can meaningfully reduce your discomfort and help your body recover faster. Here’s what actually works, what doesn’t, and what to avoid.
Why You Feel This Bad
When you drink, your liver converts alcohol first into acetaldehyde, a toxic compound, and then into acetate. This process is irreversible and unregulated, meaning your body can’t speed it up or slow it down. It simply works through the backlog at its own pace, and everything you’re feeling is a side effect of that process.
While your liver handles the alcohol, it diverts energy away from its normal metabolic tasks. Your blood sugar drops. Your body loses fluids faster than usual because alcohol suppresses the hormone that tells your kidneys to retain water. The lining of your stomach becomes inflamed. And if you slept after drinking, that sleep was lower quality than you think: alcohol fragments REM sleep, the restorative phase your brain needs most. Even if you were in bed for eight hours, your brain didn’t get a full night’s rest.
When Symptoms Peak and Fade
Hangover symptoms typically start rising about 8 hours after you began drinking and hit their worst point around 14 hours after your first drink. For most people who stopped drinking around midnight, that means the worst hits around 8 to 10 a.m. Starting about 16 hours after drinking, symptoms decline quickly. By 21 hours after your last drink, most people feel close to normal.
For the majority of drinkers, the full hangover window ranges from 14 to 23 hours after stopping. So if you’re reading this in the morning, you’re likely approaching or just past the peak, and the next several hours should bring steady improvement.
Rehydrate Strategically
Water alone helps, but it’s not the whole picture. Alcohol causes you to lose electrolytes (sodium, potassium, magnesium) along with fluids, and replacing water without electrolytes can leave you feeling washed out. Sports drinks, coconut water, or even a glass of water with a pinch of salt and a squeeze of citrus will rehydrate you more effectively than plain water. Sip steadily rather than chugging a liter at once, which can upset an already irritated stomach.
Eat the Right Foods
Your blood sugar is likely low. Alcohol disrupts your body’s normal glucose regulation, and your liver was too busy processing alcohol overnight to maintain steady blood sugar levels. This contributes to the shakiness, weakness, and brain fog you’re feeling.
Bland, carbohydrate-rich foods are the safest starting point: toast, crackers, rice, or bananas. These raise blood sugar gently without demanding much from your digestive system. If your stomach can handle it, adding some protein (eggs, plain chicken, yogurt) gives your body amino acids it needs for recovery. Bananas are particularly useful because they’re rich in potassium, one of the electrolytes you’ve lost. Avoid greasy or heavy meals early on. They can worsen nausea even though they sound appealing.
Rest, but Don’t Expect Great Sleep
Your body is still recovering from fragmented sleep. Alcohol increases the time spent in deep non-REM sleep early in the night but disrupts REM sleep later, leaving you with poor overall sleep quality and daytime sleepiness. A short nap (20 to 30 minutes) can help with fatigue without making it harder to sleep that night. If you have the luxury of sleeping longer, your body will use the time, but don’t be surprised if you still feel groggy when you wake. True sleep recovery takes a normal night of alcohol-free rest.
Choose Your Pain Reliever Carefully
If you have a pounding headache, your choice of painkiller matters. Acetaminophen (Tylenol) is processed by your liver, which is already under strain from metabolizing alcohol. The FDA specifically warns people who drink three or more alcoholic beverages a day to talk to a healthcare professional before using acetaminophen, because the combination increases the risk of liver damage. If you drank heavily, ibuprofen (Advil, Motrin) or aspirin are generally safer choices for hangover headaches. That said, both can irritate the stomach lining, which alcohol has already inflamed. Taking them with food reduces this risk.
What Doesn’t Actually Work
“Hair of the dog,” or drinking more alcohol in the morning, delays the hangover rather than curing it. You’re simply restarting the cycle and will feel worse later. Coffee can help with grogginess and caffeine-withdrawal headaches, but it’s also a mild diuretic, so pair it with water.
As for commercial hangover supplements, the evidence is bleak. A review of 82 hangover products found no peer-reviewed human data demonstrating either safety or efficacy for any of them. Many don’t even disclose the dosages of their active ingredients. Some contain compounds like dihydromyricetin (DHM) that show theoretical promise in lab studies, but no rigorous human trials have confirmed they work. Save your money.
Why Some Hangovers Hit Harder
Not all drinks produce equal hangovers. Darker spirits like brandy, whiskey, and bourbon contain higher levels of congeners, byproducts of fermentation that include methanol. Red wine also ranks high in methanol content. These congeners are independently associated with worse hangover severity. Beer and vodka contain the lowest levels. So if you drank the same total amount of alcohol but chose whiskey over vodka, your hangover will typically be more intense.
Other factors that amplify hangovers include drinking on an empty stomach (faster absorption, more stomach irritation), not drinking water alongside alcohol, and simply drinking more. Body weight, genetics, and how frequently you drink also play a role. People who drink less often tend to have worse hangovers at the same intake levels because their liver enzymes are less upregulated.
A Practical Recovery Timeline
If you’re dealing with a hangover right now, here’s a rough plan:
- First hour after waking: Sip an electrolyte drink or salted water. Eat a few crackers or a banana if your stomach allows it. Avoid coffee until you’ve had at least one or two glasses of water.
- Hours 2 to 4: Eat a proper bland meal. Take ibuprofen with food if you have a headache. Rest or nap if you can.
- Hours 4 to 8: Symptoms should be declining noticeably. Continue hydrating. Light movement like a short walk can help if you’re up for it, but don’t push through intense exercise.
- By 12 hours after waking: Most people feel close to baseline. A normal dinner and an early, alcohol-free bedtime will complete the recovery.
The uncomfortable truth is that time is the only reliable cure. Your liver clears alcohol at a fixed rate, and nothing you take or do will meaningfully speed that up. But keeping yourself hydrated, fed, and rested makes the wait significantly more bearable.