Hangover Cures That Actually Work

Roberts and colleagues at King's College London reviewed every published randomized controlled trial of hangover remedies — 21 studies, 386 participants — and published their findings in Addiction (2022). The conclusion was blunt: not a single remedy had convincing evidence of efficacy. Every study suffered from methodological problems, no two tested the same treatment, and the overall evidence quality rated as "very low."

That does not mean nothing helps. It means nothing cures a hangover the way aspirin cures a headache. Several strategies reduce severity, shorten recovery, or prevent the worst symptoms from developing in the first place — and the distinction between "cure" and "reduce" is where most hangover advice falls apart. Here is what the research actually supports, what it does not, and what you can do tonight to feel better tomorrow.

What Actually Helps

Water and Electrolytes

Verster and colleagues ran a randomized trial published in Alcohol in 2024 (DOI: 10.1016/j.alcohol.2024.07.006) and found that water consumed during or after drinking had a modest preventive effect on next-day hangover symptoms. Modest — not dramatic. Dehydration and hangovers turned out to be largely independent effects of alcohol, which means rehydrating helps with the headache and dry mouth but leaves the nausea, fatigue, and brain fog untouched.

Electrolyte drinks (Pedialyte, Liquid IV, coconut water) replace sodium and potassium that alcohol flushes out through increased urination. They outperform plain water for rehydration speed, though no published trial has compared them head-to-head for hangover symptom relief specifically.

Eating Before and During Drinking

NIAAA's research on alcohol absorption confirms that a full stomach slows the rate at which alcohol reaches the small intestine, where most absorption happens. The practical effect is a lower peak BAC — and since peak BAC is the single strongest predictor of hangover severity, eating before drinking is one of the most effective prevention strategies available.

Fats and proteins work best because they delay gastric emptying longer than carbohydrates. A burger, a handful of nuts, eggs, or avocado toast before heading out will do more than a salad. Eating during drinking helps too, though the effect diminishes as absorption progresses.

Choosing Low-Congener Drinks

Rohsenow and colleagues at Brown University published the definitive congener study in Alcoholism: Clinical and Experimental Research (2010, DOI: 10.1111/j.1530-0277.2009.01116.x). They gave subjects enough bourbon or vodka to reach identical BAC levels, then measured hangover symptoms the next morning. Bourbon — which contains 37 times more congeners than vodka — produced significantly worse hangovers on every metric, despite the same blood alcohol peak.

The practical ranking: vodka and gin cause the least congener-related misery, white wine and beer sit in the middle, and bourbon, whiskey, brandy, and red wine hit the hardest. Our hangover calculator factors congener content into your risk score for exactly this reason.

Sleep

Alcohol wrecks sleep quality even when it makes you drowsy. It suppresses REM sleep, fragments the second half of the night, and leaves you functionally sleep-deprived even after eight hours in bed. The less genuine rest your body gets, the worse the hangover feels — and the longer recovery takes.

Sleeping in when you can is one of the most effective recovery strategies because it gives your liver uninterrupted processing time while your body handles the inflammatory cleanup. No alarm clock, no early commitments, no forcing yourself to function at 7 AM when your body is still clearing acetaldehyde.

Pacing Your Drinks

Your liver clears roughly one standard drink per hour. Drink faster than that and the excess alcohol stacks up in your bloodstream, driving your BAC higher and giving your liver a backlog that takes hours to clear. Four drinks in one hour produces a dramatically different morning than four drinks over four hours — use the sober calculator to see the timeline difference.

What Does Not Work

Coffee

Temple University researchers Gulick and Gould tested this directly in a study published in Behavioral Neuroscience and found that caffeine masks the feeling of impairment without reducing it. You feel more alert after an espresso, but your coordination, reaction time, and judgment are just as compromised as before the cup. Worse, the false sense of recovery can lead people to drive or make decisions they otherwise would not.

Coffee is also a diuretic, which compounds the dehydration that alcohol already caused. If you need the caffeine to function, drink it with a full glass of water and food.

Hair of the Dog

Drinking more alcohol the morning after temporarily suppresses hangover symptoms by keeping blood alcohol elevated. This is not a cure — it is a delay. Once the new alcohol clears, the original hangover returns, often worse because your liver now has an extended workload. Cedars-Sinai explicitly warns against this approach because it establishes a pattern that edges toward dependence.

Cold Showers

A blast of cold water triggers an adrenaline response that temporarily masks fatigue. It does not accelerate alcohol metabolism, reduce inflammation, or address any hangover mechanism. The effect wears off in minutes, and the unpleasantness is a poor trade for what amounts to a placebo.

Hangover Pills and Supplements

Roberts et al. reviewed every randomized controlled trial of pharmacological hangover remedies in their 2022 Addiction systematic review (DOI: 10.1111/add.15786). Clove extract, red ginseng, tolfenamic acid, and Korean pear juice each showed marginal effects in single studies — but none has been replicated, and the overall evidence quality rated as "very low." No hangover pill has cleared the basic scientific bar for efficacy.

DHM (dihydromyricetin) and NAC (N-acetylcysteine) generate significant marketing claims but have no published randomized human trials demonstrating hangover relief. Animal studies exist for both, but animal-to-human translation in alcohol research has a poor track record.

Greasy Breakfast

The greasy breakfast myth confuses prevention with treatment. Fat and protein eaten before drinking slow absorption and reduce peak BAC — that part is real. Eating a greasy breakfast after the alcohol is already in your system does nothing for the hangover except add calories. If your stomach can handle it, bland carbohydrates (toast, crackers, rice) are a better choice because they stabilize blood sugar without aggravating an already irritated stomach lining.

Symptom-by-Symptom Management

Since no cure exists, the practical approach is treating individual symptoms while your body clears the remaining toxins.

Headache

Ibuprofen (Advil) with food and water is the safest over-the-counter option. Avoid acetaminophen (Tylenol) — it competes with alcohol for liver enzymes and can cause liver damage when both are in your system. Aspirin works but irritates the stomach lining, which alcohol has already inflamed.

Nausea

Ginger — real ginger tea or ginger supplements, not ginger ale with negligible ginger content — has documented anti-nausea properties for motion sickness and chemotherapy, though hangover-specific trials are lacking. Small sips of clear fluids, avoiding strong smells, and eating bland crackers when your stomach can tolerate them is the standard approach.

Fatigue and Brain Fog

More sleep is the only reliable fix. If you cannot sleep, gentle movement (a slow walk, light stretching) increases blood flow without taxing your compromised body. Avoid intense exercise — your coordination is still impaired and dehydration makes muscle injury more likely.

Anxiety ("Hangxiety")

Alcohol disrupts GABA and glutamate — the brain's primary calming and excitatory neurotransmitters. As alcohol clears, glutamate rebounds and GABA drops, producing anxiety, restlessness, and racing thoughts that have nothing to do with your actual life circumstances. Recognizing that hangover anxiety is neurochemical, not situational, helps — it passes as your brain chemistry normalizes, typically within 12-24 hours.

The Prevention Checklist

Everything above is damage control. Prevention beats treatment every time, and the research is clear on what actually moves the needle.

• →Eat a real meal before drinking — fats and proteins work best
• →Alternate drinks with water — one glass of water per alcoholic drink
• →Choose clear spirits over dark — vodka and gin produce fewer congeners than bourbon or whiskey
• →Pace to one drink per hour — matches your liver's processing speed
• →Sleep as much as possible — your body does its best repair work unconscious
• →Know your number — use the hangover calculator before you go out

The Bottom Line

No pill, food, or supplement cures a hangover — that is what 21 clinical trials and decades of research tell us. What works is reducing severity through prevention (food, water, drink choice, pacing) and managing symptoms through time, rest, hydration, and careful use of anti-inflammatories. The gap between a brutal morning and a manageable one is mostly decided the night before, not the morning after.

If hangovers are consistently severe despite moderate drinking, or if the fear of hangovers is affecting your relationship with alcohol, that is a conversation worth having with a doctor. SAMHSA's free, confidential helpline is available around the clock: 1-800-662-4357.