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What a hangover can feel like
Symptoms vary, but may include fatigue, weakness, thirst, headache, muscle aches, nausea, stomach pain, vertigo, sensitivity to light or sound, anxiety, irritability, sweating, and increased blood pressure. The National Institute on Alcohol Abuse and Alcoholism (NIAAA) lists these among possible hangover symptoms.
Symptoms typically peak when blood alcohol concentration returns to about zero. They can persist for 24 hours or longer, according to the NIAAA’s 2019 fact sheet.
Why hangovers happen
Alcohol is the main cause, but a hangover is not simply dehydration. Several effects may contribute, and their importance can differ from person to person:
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- Fluid loss: Alcohol suppresses vasopressin, a hormone that helps the body retain water, which can increase urination. Mild dehydration may contribute to thirst, fatigue, and headache.
- Disrupted sleep: Alcohol can fragment sleep, leaving you tired even after spending hours in bed.
- Stomach irritation: Alcohol can irritate the stomach lining and increase acid release, contributing to nausea and stomach pain.
- Inflammation and alcohol metabolism: Immune-system activity and acetaldehyde, a byproduct formed as the body processes alcohol, may also play a part.
- “Mini-withdrawal” effects: As intoxication wears off, the brain adjusts to alcohol’s effects. NIAAA describes this adjustment as a possible contributor to hangover symptoms.
Some darker spirits contain congeners that may worsen symptoms for some people; people sensitive to sulfites may get headaches after drinking wine. Neither factor predicts exactly who will have a hangover.
What can ease discomfort—and what is not a cure
NIAAA says no hangover remedy has been scientifically proven effective. Recovery takes time while the body clears alcohol byproducts, rehydrates, heals irritated tissue, and restores normal immune and brain activity.
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- HYDRATION ROUTINE MUST-HAVE: No pills to swallow or powders to spill here. Add Alka-Seltzer Hangover Relief to your morning-after hydration routine by popping two tablets into water. And then hydrate with another glass of water.
- Fast-Acting Relief in about 15 Minutes: Our effervescent hangover relief tablets create a fizzy, orange-flavored hangover cure that you can see fizzing and works fast, in as little as 15 minutes
- Great for the morning after a Holiday Party: Be a hero after a night out by always being prepared with Alka-Seltzer Hangover Relief. Alka-Seltzer Hangover Relief packets are pocket-sized and our boxes are perfect to pass out as party favors or have on hand to share with friends. Trust us... your guests will thank you later
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Fluids and electrolytes
Drinking fluids can address dehydration. If you feel sick or have vomited, NHS guidance is to start with small sips and gradually drink more. If vomiting or diarrhea has caused substantial fluid loss, a pharmacist may recommend an oral rehydration solution; that is general dehydration advice, not proof that the product treats hangover severity.
Electrolyte drinks and powders are not established hangover treatments. NIAAA reports that research has not found a link between electrolyte disruption and hangover severity, or evidence that added electrolytes reduce severity. The evidence cited here does not establish IV treatments as hangover cures either.
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Coffee, showers, and another drink
Coffee and a shower may change how you feel, but neither speeds brain recovery or cures a hangover. Drinking alcohol in the morning may temporarily lessen some symptoms, but can prolong malaise; it is not a remedy.
Pain relievers need caution
Alcohol changes the safety picture for common pain relievers. NIAAA warns that acetaminophen (also called paracetamol in some countries) combined with alcohol can be toxic to the liver; MedlinePlus also cautions about possible liver damage. Aspirin and ibuprofen can increase acid release and irritate the stomach lining, according to NIAAA. These cautions are why no pain reliever or dose should be treated as a universal fix after drinking.
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- POWERFUL MULTI-SYMPTOM FORMULA: Blowfish relieves headache pain, boosts energy, and helps hydrate in one easy step. The formulation combines a maximum strength pain relief with pharmaceutical grade caffeine to deliver better headache relief and more energy.
- FAST, EFFECTIVE RELIEF IN 15 MINUTES: Because Blowfish’s effervescent tablets are already dissolved in water, they get into your system twice as fast as regular pills, so you’ll start to feel relief within minutes (seriously).
- NO NEED TO PLAN AHEAD: Unlike hangover prevention products that need to be taken before drinking, Blowfish is designed to be taken when you wake up so you don't need to plan ahead. Keep it on hand for even your unexpected hangovers.
- FSA and HSA ELIGIBLE: Blowfish is real hangover medicine with a formulation that’s been recognized by the FDA to treat hangovers, so it’s FSA and HSA eligible.
Can you work, drive, or play games?
A hangover can impair attention, judgment, and coordination, even after the feeling of intoxication has passed. Don’t drive, operate machinery, or take on other tasks that require unimpaired judgment and coordination while affected. If gaming, pause or choose something low-stakes if symptoms make it hard to focus or react safely; don’t assume that feeling more alert means your coordination has recovered.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When symptoms may need urgent help
A hangover is different from severe alcohol withdrawal. NHS guidance says visible shaking, confusion, hallucinations, or a seizure in the context of alcohol withdrawal require emergency help. These are warning signs of severe withdrawal, not a complete checklist for alcohol poisoning. If you are unsure whether symptoms are an emergency, contact local emergency services.
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How to reduce the chance of another hangover
NIAAA says the only sure way to avoid a hangover is to abstain or keep alcohol intake to a minimum. In general, more alcohol means a worse hangover; the order of drinks or mixing beer, wine, and spirits does not reliably prevent one. Individual responses vary, so there is no dependable drink threshold that guarantees you will avoid symptoms.
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