Hangovers seem to be the body’s way of reminding us about the hazards of overindulgence. Physiologically, it’s a group effort: Diarrhea, fatigue, headache, nausea, and shaking are the classic symptoms. Sometimes, systolic (the upper number) blood pressure goes up, the heart beats faster than normal, and sweat glands overproduce — evidence that the “fight or flight” response is revved up. Some people become sensitive to light or sound. Others suffer a spinning sensation (vertigo).
The causes are as varied as the symptoms. Alcohol is metabolized into acetaldehyde, a substance that’s toxic at high levels. However, concentrations rarely get that high, so that’s not the complete explanation.
The key ingredient seems to be “drinking to intoxication”; how much you drank to get there is less important.
1. Hair of the dog. Drinking to ease the symptoms of a hangover is sometimes called taking the hair of the dog, or hair of the dog that bit you. The notion is that hangovers are a form of alcohol withdrawal, so a drink or two will ease the withdrawal.
Both alcohol and certain sedatives, such as benzodiazepines like diazepam (Valium), interact with GABA receptors on brain cells, he explains. And it’s well documented that some people have withdrawal symptoms from short-acting sedatives as they wear off. Perhaps the brain reacts similarly as blood alcohol levels begin to drop.
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2. Drink fluids. Alcohol promotes urination because it inhibits the release of vasopressin, a hormone that decreases the volume of urine made by the kidneys. If your hangover includes diarrhea, sweating, or vomiting, you may be even more dehydrated. Although nausea can make it difficult to get anything down, even just a few sips of water might help your hangover.
3. Get some carbohydrates into your system. Drinking may lower blood sugar levels, so theoretically some of the fatigue and headaches of a hangover may be from a brain working without enough of its main fuel. Moreover, many people forget to eat when they drink, further lowering their blood sugar. Toast and juice is a way to gently nudge levels back to normal.
4. Avoid darker-colored alcoholic beverages. Experiments have shown that clear liquors, such as vodka and gin, tend to cause hangovers less frequently than dark ones, such as whiskey, red wine, and tequila. The main form of alcohol in alcoholic beverages is ethanol, but the darker liquors contain chemically related compounds (congeners), including methanol. According to Dr. Swift’s review paper, the same enzymes process ethanol and methanol, but methanol metabolites are especially toxic, so they may cause a worse hangover.
5. Take a pain reliever, but not Tylenol. Aspirin, ibuprofen (Motrin, other brands), and other nonsteroidal anti-inflammatory drugs (NSAIDs) may help with the headache and the overall achy feelings. NSAIDs, though, may irritate a stomach already irritated by alcohol. Don’t take acetaminophen (Tylenol). If alcohol is lingering in your system, it may accentuate acetaminophen’s toxic effects on the liver.
6. Drink coffee or tea. Caffeine may not have any special anti-hangover powers, but as a stimulant, it could help with the grogginess.
7. B vitamins and zinc. A study recently published in The Journal of Clinical Medicine evaluated the diets for 24 hours before and after excessive drinking occurred. It was a small study and results were based on the participants saying what they ate. However, they did find that people whose food and beverage consumption contained greater amounts of zinc and B vitamins had less severe hangovers.