Hangovers

For many people, a night of drinking can lead to a painful morning after and the dreaded effects of a hangover. What does science tell us about this phenomenon? What causes the typical symptoms of a hangover? And the question perhaps as old as hangovers themselves—are there any real remedies?

What Is a Hangover?

A hangover refers to a set of symptoms that occur as a consequence of drinking too much. Typical symptoms include fatigue, weakness, thirst, headache, muscle aches, nausea, stomach pain, vertigo, sensitivity to light and sound, anxiety, irritability, sweating, and increased blood pressure. A hangover can vary from person to person.

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What Causes Hangover Symptoms?

A number of factors can contribute to hangovers:

• Mild dehydration: Alcohol suppresses the release of vasopressin, a hormone produced by the brain that sends signals to the kidneys causing them to retain fluid. As a result, alcohol increases urination and excess loss of fluids. The mild dehydration that results likely contributes to hangover symptoms such as thirst, fatigue, and a headache.
• Disrupted sleep: People may fall asleep faster after drinking alcohol, but their sleep is fragmented, and they tend to wake up earlier. This contributes to fatigue, as well as lost productivity.
• Gastrointestinal irritation: Alcohol directly irritates the lining of the stomach and increases acid release. This can lead to nausea and stomach discomfort.
• Inflammation: Alcohol increases inflammation in the body. Inflammation contributes to the malaise that people feel when they are sick, so it may play a role in hangover symptoms as well.
• Acetaldehyde exposure: Alcohol metabolism, primarily by the liver, creates the compound acetaldehyde, a toxic, short-lived byproduct, which contributes to inflammation in the liver, pancreas, brain, gastrointestinal tract, and other organs.
• Mini-withdrawal: While drinking, individuals may feel calmer, more relaxed, and even euphoric, but the brain quickly adjusts to those positive effects as it tries to maintain balance. As a result, when the buzz wears off, people can feel more restless and anxious than before they drank.

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Because individuals are so different, it is difficult to predict how many drinks will cause a hangover. Any time people drink to intoxication, there is a chance they could have a hangover the next day.

When Does a Hangover Peak and How Long Does It Last?

Hangover symptoms peak when the blood alcohol concentration in the body returns to about zero. The symptoms can last 24 hours or longer.

Are Hangovers Dangerous or Just Painful?

Hangovers can be both painful and dangerous. During a hangover, a person’s attention, decision-making, and muscle coordination can all be impaired. Also, the ability to perform important tasks, such as driving, operating machinery, or caring for others can be negatively affected.

Are There Any Remedies for a Hangover?

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Although many remedies for alleviating hangovers are mentioned on the web and in social media, none have been scientifically proven to be effective. There is no magic potion for beating hangovers—and only time can help. A person must wait for the body to finish clearing the toxic byproducts of alcohol metabolism, to rehydrate, to heal irritated tissue, and to restore immune and brain activity to normal. There is no way to speed up the brain’s recovery from alcohol use—drinking coffee, taking a shower, or having an alcoholic beverage the next morning will not cure a hangover.

Some people take over-the-counter pain relievers (often acetaminophen) before going to bed to minimize hangovers. It is important to recognize that the combination of alcohol and acetaminophen can be toxic to the liver. Like alcohol, certain over-the-counter pain relievers, including aspirin and ibuprofen, can increase acid release and irritate the lining of the stomach. Proceed with caution when using these medications before or after consuming alcohol.

To help ease their hangover symptoms, some people turn to electrolyte-rich sports drinks or other products, or even intravenous (IV) treatments, in an effort to treat electrolyte imbalance caused by increased urination and fluid loss as a result of drinking. Research has not found a correlation between the extent of electrolyte disruptions and the severity of hangovers, or the impact of added electrolytes on hangover severity. In most people, the body will quickly restore electrolyte balance once the effects of alcohol subside.

Ultimately, the only surefire remedy for a hangover is to avoid getting one by drinking in moderation or choosing not to drink.

For more information, please visit: https://www.niaaa.nih.gov

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