Hangover Tamil Dubbed 3
Ilario Grijalva
A hangover is a group of unpleasant symptoms that can happen after drinking too much alcohol. As if feeling awful weren't bad enough, frequent hangovers also are linked with poor performance and conflict at home, school and work.
Hangover symptoms often begin when your blood alcohol content drops and is at or near zero. Symptoms are usually in full effect the morning after a night of heavy drinking. Depending on what and how much alcohol you drank, you may notice:
Hangovers after a single night's drinking go away on their own. Talk with your healthcare professional if you're concerned that frequent heavy drinking may lead to serious problems, such as alcohol withdrawal.
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Alcoholic beverages contain ingredients called congeners. These give many types of alcoholic beverages their taste and smell. They also can play a role in hangovers. Congeners are found in larger amounts in dark liquors, such as brandy and bourbon, than in clear liquors, such as vodka and gin.
Anyone who drinks alcohol can have a hangover. But some people are more likely to have hangovers than others are. A difference in a gene that affects the way the body breaks down alcohol may make some people flush, sweat or become ill after drinking even a small amount of alcohol.
Some people take pain relievers to prevent hangover symptoms. But ask your healthcare professional if this is safe for you and how much medicine is best for you. These medicines may not work well together with other medicines you take.
Aspirin and ibuprofen (Advil, Motrin IB, others) can cause your stomach to make more acid, which can irritate your stomach. And acetaminophen (Tylenol, others) may cause serious liver damage if taken with too much alcohol.
A hangover is the experience of various unpleasant physiological and psychological effects usually following the consumption of alcohol, such as wine, beer, and liquor. Hangovers can last for several hours or for more than 24 hours. Typical symptoms of a hangover may include headache, drowsiness, concentration problems, dry mouth, dizziness, fatigue, gastrointestinal distress (e.g., nausea, vomiting, diarrhea), absence of hunger, light sensitivity, depression, sweating, hyper-excitability, irritability, and anxiety.[2]
While the causes of a hangover are still poorly understood,[3] several factors are known to be involved including acetaldehyde accumulation, changes in the immune system and glucose metabolism, dehydration, metabolic acidosis, disturbed prostaglandin synthesis, increased cardiac output, vasodilation, sleep deprivation, and malnutrition. Beverage-specific effects of additives or by-products such as congeners in alcoholic beverages also play an important role.[2] The symptoms usually occur after the intoxicating effect of the alcohol begins to wear off, generally the morning after a night of heavy drinking.[4]
Though many possible remedies and folk cures have been suggested, there is no compelling evidence to suggest that any are effective for preventing or treating hangovers.[5][6] Avoiding alcohol or drinking in moderation are the most effective ways to avoid a hangover.[5]The socioeconomic consequences of hangovers include workplace absenteeism, impaired job performance, reduced productivity and poor academic achievement. A hangover may also impair performance during potentially dangerous daily activities such as driving a car or operating heavy machinery.[7]
An alcohol hangover is associated with a variety of symptoms that may include drowsiness, headache, concentration problems, dry mouth, dizziness, gastrointestinal complaints, fatigue, sweating, nausea, hyper-excitability, anxiety, and a feeling of general discomfort that may last more than 24 hours.[8] Alcohol hangover symptoms develop when blood alcohol concentration falls considerably and peak when it returns to almost zero.[7][9] Hangover symptoms validated in controlled studies include general malaise, thirst, headache, feeling dizzy or faint, tiredness, loss of appetite, nausea, stomach ache, and feeling as though one's heart is racing. Some symptoms such as changes in sleep pattern and gastrointestinal distress are attributed to direct effects of the alcohol intoxication, or withdrawal symptoms.[10] Drowsiness and impaired cognitive function are the two dominant features of alcohol hangover.[9]
The processes which lead to hangovers are still poorly understood.[3] Several pathophysiological changes may give rise to the alcohol hangover including increased levels of acetaldehyde, hormonal alterations of the cytokine pathways and decrease of the availability of glucose. Additional associated phenomena are dehydration, metabolic acidosis, disturbed prostaglandin synthesis, increased cardiac output, vasodilation, sleep deprivation and insufficient eating.[2] Some complex organic molecules found in alcoholic beverages known as congeners may play an important role in producing hangover effects because some, such as methanol, are metabolized to the notably toxic substances formaldehyde and formic acid.[2]
After being ingested, the ethanol in alcoholic beverages is first converted to acetaldehyde by the enzyme alcohol dehydrogenase and then to acetic acid by oxidation and egestion process. These reactions also convert nicotinamide adenine dinucleotide (NAD+) to its reduced form NADH in a redox reaction. By causing an imbalance of the NAD+/NADH redox system, alcoholic beverages make normal bodily functions more difficult. Consequences of the alcohol induced redox changes in the human body include increased triglyceride production, increased amino acid catabolism, inhibition of the citric acid cycle, lactic acidosis, ketoacidosis, hyperuricemia, disturbance in cortisol and androgen metabolism and increased fibrogenesis. The metabolism of glucose and insulin are also influenced.[11] However, recent studies showed no significant correlation between hangover severity and the concentrations of various hormones, electrolytes, free fatty acids, triglycerides, lactate, ketone bodies, cortisol, and glucose in blood and urine samples.[4]
Alcohol also induces the CYP2E1 enzyme, which metabolizes ethanol and other substances into more reactive toxins. In particular, in binge drinking the enzyme is activated and plays a role in creating a harmful condition known as oxidative stress which can lead to cell death.[12]
Acetaldehyde, the first by-product of ethanol, is between 10 and 30 times more toxic than alcohol itself[13] and can remain at an elevated plateau for many hours after initial ethanol consumption.[14] In addition, certain genetic factors can amplify the negative effects of acetaldehyde. For example, some people (predominantly East Asians) have a mutation in their alcohol dehydrogenase gene that makes this enzyme unusually fast at converting ethanol to acetaldehyde. In addition, about half of all East Asians convert acetaldehyde to acetic acid more slowly (via acetaldehyde dehydrogenase), causing a higher buildup of acetaldehyde than normally seen in other groups.[15] The high concentration of acetaldehyde causes the alcohol flush reaction, colloquially known as the "Asian Flush". Since the alcohol flush reaction is highly uncomfortable and the possibility of hangovers is immediate and severe, people with this gene variant are less likely to become alcoholics.[16][17]
Acetaldehyde may also influence glutathione peroxidase, a key antioxidant enzyme, and increases the susceptibility to oxidative stress.[12]Likewise, acetic acid (or the acetate ion) can cause additional problems. One study found that injecting sodium acetate into rats caused them to have nociceptive behavior (headaches). In addition, there is a biochemical explanation for this finding. High acetate levels cause adenosine to accumulate in many parts of the brain. But when the rats were given caffeine, which blocks the action of adenosine, they no longer experienced headaches.[18][19]
In addition to ethanol and water, most alcoholic drinks also contain congeners, either as flavoring or as a by-product of fermentation and the wine aging process. While ethanol is by itself sufficient to produce most hangover effects, congeners may potentially aggravate hangover and other residual effects to some extent. Congeners include substances such as amines, amides, acetones, acetaldehydes, polyphenols, methanol, histamines, fusel oil, esters, furfural, and tannins, many but not all of which are toxic.[10] One study in mice indicates that fusel oil may have a mitigating effect on hangover symptoms,[20] while some whiskey congeners such as butanol protect the stomach against gastric mucosal damage in the rat.[21] Different types of alcoholic beverages contain different amounts of congeners. In general, dark liquors have a higher concentration while clear liquors have a lower concentration. Whereas vodka has virtually no more congeners than pure ethanol, bourbon has a total congener content 37 times higher than that found in vodka.[10]
Several studies have examined whether certain types of alcohol cause worse hangovers.[22][23][24][25] All four studies concluded that darker liquors, which have higher congeners, produced worse hangovers. One even showed that hangovers were worse and more frequent with darker liquors.[22] In a 2006 study, an average of 14 standard drinks (330 ml each) of beer was needed to produce a hangover, but only 7 to 8 drinks was required for wine or liquor (note that one standard drink has the same amount of alcohol regardless of type).[25] Another study ranked several drinks by their ability to cause a hangover as follows (from low to high): distilled ethanol diluted with fruit juice, beer, vodka, gin, white wine, whisky, rum, red wine and brandy.[24][25]