Lena Savoie
Alcohol is a substance that affects people differently, depending on various factors such as gender, mood, and physical condition. It is classified as a depressant and a stimulant, and its consumption can lead to intoxication, which is caused by a buildup of alcohol in the bloodstream. Alcohol is broken down (metabolized) primarily by the liver, which can process approximately one drink per hour. The amount of alcohol consumed, the speed of consumption, and individual tolerance levels all influence the level of intoxication. Alcohol consumption during pregnancy can be toxic to the developing fetus and is a leading preventable cause of intellectual disability. Mixing alcohol with certain medications can be dangerous, enhancing the effects of both substances. Driving while impaired by alcohol or drugs is a criminal offense, and blood alcohol content (BAC) is used to determine impairment, with a BAC of .08 percent or higher considered evidence of intoxication.
| Characteristics | Values |
|---|---|
| Amount of alcohol consumed | The more alcohol consumed, the more it accumulates in the blood, increasing intoxication. |
| Speed of consumption | Drinking rapidly leads to faster intoxication than sipping or drinking slowly. |
| Tolerance to alcohol | Tolerance varies from person to person, and some may develop a high tolerance through habitual drinking. |
| Physical condition | People who are out of shape become intoxicated more quickly than those who are muscular. |
| Gender | Alcohol affects men and women differently. Its effects tend to be stronger and last longer in women. |
| Mood | Alcohol exaggerates a person's mood. |
| Fatigue and stress | People who are fatigued or stressed become intoxicated more quickly. |
| Food | Food slows intoxication. |
| Alcohol metabolism | The liver metabolises alcohol at a constant rate of approximately one drink per hour. |
| Alcohol detoxification | Allowing the liver enough time to metabolise alcohol is the only way to remove it from the body. |
| Blood alcohol concentration (BAC) | BAC of .08 percent is evidence of intoxication, and .18 percent or more is evidence of aggravated driving while intoxicated. |
| Alcohol and medication | Alcohol enhances the effects of medication. |
| Alcohol and pregnancy | Prenatal alcohol exposure is toxic to the developing foetus and is a leading preventable cause of intellectual disability. |
| Alcohol dehydrogenase (ADH) | About 50% of Japanese, Chinese, and Korean people have a form of ADH that causes high levels of acetaldehyde, leading to an intense response to alcohol. |
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What You'll Learn
Alcohol withdrawal can be treated with benzodiazepines
Alcohol withdrawal syndrome (AWS) can be treated with benzodiazepines, which are considered the gold standard for treatment. Benzodiazepines are medications that are cross-tolerant with alcohol, meaning they act on similar receptors in the brain and can essentially replace the effects of alcohol, preventing withdrawal symptoms. They are effective in reducing related anxiety, restlessness, insomnia, tremors, delirium tremens (DT), and withdrawal seizures.
Benzodiazepines can be administered on a fixed-schedule or symptom-triggered regimen. In a fixed-schedule regimen, benzodiazepines are administered at specific intervals, with additional doses given as needed based on the severity of the withdrawal symptoms. This method may be preferred when close monitoring is not available, such as in ambulatory treatment settings.
On the other hand, a symptom-triggered regimen involves administering benzodiazepines according to the assessed withdrawal symptoms using scales like the CIWA-Ar. This approach is generally favoured as it results in the administration of less total medication and a shorter duration of treatment. It also reduces the risk of under or over-medicating the patient. However, it requires trained personnel and the efficacy of this regimen depends on the validity of the patient assessment.
Both short-acting and long-acting benzodiazepines have their advantages and disadvantages. Short-acting benzodiazepines have a lower risk of oversedation and are safer for patients with liver problems or disease. However, they may lead to breakthrough symptoms and an imminent risk of seizures. Long-acting benzodiazepines, such as diazepam (Valium) and chlordiazepoxide (Librium), have a longer half-life, resulting in a smoother withdrawal process and a lower likelihood of rebound withdrawal symptoms.
While benzodiazepines have been shown to be safe and effective in treating AWS, they also come with certain risks, especially when taken for extended periods or at high doses. These risks include unwanted side effects and the potential for dependence. In rare cases, extremely high doses of benzodiazepines may be required to control severe withdrawal symptoms, which can be a challenge due to clinicians' reluctance to administer such high doses.
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Alcohol is toxic to a developing foetus
The impact of alcohol on fetal health is significant, and it increases the risk of negative outcomes, including Fetal Alcohol Spectrum Disorder (FASD). FASD includes several alcohol-related diagnoses, such as Fetal Alcohol Syndrome (FAS), partial FAS (pFAS), alcohol-related neurodevelopmental disorder (ARND), and Alcohol-Related Birth Defects (ARBD). The specific assessment techniques used to make a definitive diagnosis of FASD are still debated, especially for ARND. However, it is important to note that FASD captures only a modest proportion of the damage to the developing foetus from alcohol exposure.
Alcohol can negatively impact the fetus's brain, spinal cord, heart, arms, legs, eyes, and ears. It can also affect the development of the baby's teeth, palate, and external genitals. The abnormalities associated with PAE can begin during development and persist throughout a person's life, increasing susceptibility to diseases such as diabetes and hypertension. Additionally, PAE can result in neurodevelopmental and craniofacial abnormalities, as well as affecting various organ systems, including the cardiac, renal, endocrine, and reproductive systems.
The amount of alcohol consumed and the speed of consumption also play a role in the impact on the foetus. The more alcohol consumed, the more it accumulates in the blood, increasing intoxication. When there is excessive alcohol in the blood, the liver cannot keep up with the detoxification process, leading to a buildup of alcohol in the system. This buildup can then pass through to the foetus, just like any other liquids or foods consumed by the pregnant person.
Major national medical organizations, including the American College of Obstetricians and Gynecologists, the Centers for Disease Control (CDC), and the Surgeon General, recommend complete abstinence from alcohol during pregnancy. This is because there is no safe amount of alcohol consumption during pregnancy, and it can lead to premature labour, miscarriage, stillbirth, and a range of developmental, physical, mental, and emotional disabilities and disorders in the baby.
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Alcohol dehydrogenase (ADH) gene affects alcohol metabolism
Alcohol affects each person differently, and it affects the same person differently on different occasions. Several factors influence how quickly a person becomes intoxicated, including gender, mood, physical condition, and speed of consumption. Gender, for example, influences the rate of intoxication because women tend to have higher levels of estrogen, body fat, and lower levels of body water than men, which limits the amount of alcohol absorbed into tissues, keeping it in the bloodstream. Men, on the other hand, have more of the enzymes that break down alcohol in the stomach before it enters the bloodstream.
The liver metabolises alcohol at a constant rate of approximately one drink per hour. If there is excessive alcohol in the blood, the liver cannot speed up the detoxification process, and the unmetabolised alcohol continues to circulate in the bloodstream, leading to intoxication. The amount of alcohol in the body is measured as blood alcohol concentration (BAC).
The primary enzymes involved in alcohol metabolism are alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH). These enzymes occur in several forms encoded by different genes, and some of these genes have variants (alleles) that encode enzymes with different characteristics and ethnic distributions. The ADH and ALDH alleles influence a person's level of alcohol consumption and their risk of alcoholism.
For instance, certain ADH1B and ADH1C alleles encode highly active ADH enzymes, resulting in a more rapid conversion of alcohol (ethanol) to acetaldehyde. These alleles have a protective effect against alcoholism. The ADH1B gene, in particular, has several functional variants, one of which involves a single nucleotide polymorphism (SNP) that leads to either a histidine or an arginine residue at a specific position in the mature polypeptide.
Studies have shown that people carrying certain ADH and ALDH alleles are at a significantly reduced risk of becoming alcohol dependent. These associations are the strongest of any gene with the risk of alcoholism. Additionally, independent studies have confirmed that non-coding SNPs in the ADH1A and ADH1B genes are associated with alcoholism risk in European-American families. Furthermore, variations in the ADH7 gene may affect alcoholism risk through interactions with other variants.
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Alcohol affects men and women differently
Alcohol does indeed affect men and women differently. Firstly, women have more body fat and less body water than men. This means that alcohol is less dispersed in women's bodies, resulting in a higher blood alcohol level per drink than in men. Women also produce less of the alcohol dehydrogenase (ADH) enzyme, which controls the rate at which alcohol is broken down in the body. This results in a more rapid rise in blood alcohol level, which also stays elevated for longer.
Secondly, women are more vulnerable to the effects of alcohol. They are more likely to experience blackouts, mood and behavioural changes, and more rapidly develop an addiction. Research suggests that women suffer greater harm than men at lower levels of alcohol exposure. For example, women need fewer drinks than men to feel drunk, and are more susceptible to alcohol-induced liver inflammation, cardiovascular disease, memory blackouts, hangovers, and certain cancers. Women are also more likely to drink in response to negative emotions and problems with loved ones, and are more likely to suffer from higher rates of depression and anxiety.
Thirdly, alcohol consumption has long been a male-dominated activity, and globally, men consume more alcohol and account for more alcohol-related harm to themselves and others than women. However, this gap is narrowing, with alcohol use increasing for women but not for men. In the US, for example, rates of alcohol-related emergency department visits, hospitalizations, and deaths have increased among adults over the past two decades, with larger increases for women.
Finally, it is important to note that the number of drinks considered to be moderate drinking for men (two drinks per day) is nearing heavy drinking for women. As a result, the recommended alcohol intake for women is no more than one drink per day on average.
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Alcohol enhances the effects of other drugs
Alcohol is a depressant, which means it alters the balance of chemicals in the brain and interferes with processes in the central nervous system. Mixing alcohol with other drugs can therefore have a range of harmful side effects and increase the risk of fatal overdose. The specific dangers depend on the amount of alcohol and the type of drug consumed.
Alcohol is commonly mixed with illegal drugs such as cocaine, heroin, ecstasy, marijuana, and amphetamines. Mixing alcohol with these drugs can cause unpredictable, life-threatening effects. For example, when alcohol is mixed with cocaine, they produce cocaethylene, a cardiotoxic metabolite that increases the risk of sudden death from heart attack or stroke. Similarly, combining alcohol with heroin can lead to an extremely slow heart rate and increase the risk of overdose. Mixing alcohol with ecstasy can trigger extreme dehydration, heat stroke, nausea, and vomiting. Since both marijuana and alcohol can cause nausea and vomiting, the former may prevent the body from vomiting alcohol.
Alcohol can also increase the effects of prescription drugs, such as opioids, central nervous system (CNS) depressants, stimulants, and hallucinogens. For instance, alcohol can enhance the sedative effects of antihistamines and antidepressants. It can also slow the breakdown of medications metabolized by CYP2E1, leading to higher drug concentrations and potentially harmful overdoses. Alcohol may also increase the risk of gastrointestinal bleeding when taken with nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen and aspirin.
Individuals may mix alcohol with other substances to enhance their effects or to lessen the effects of one substance by taking another. However, this can lead to serious physical, behavioural, and health complications. Prolonged consumption of drugs and alcohol can also increase tolerance, requiring higher doses of the substance to achieve the same desirable effects. This can quickly spiral out of control, leading to permanent health complications and an increased risk of fatal overdose.
It is important to note that the effects of mixing alcohol with other substances vary widely depending on various factors, including the type and amount of substance used, as well as any co-occurring physical and mental health disorders. If you or someone you know needs help regarding substance use, it is recommended to seek professional help from a specialized drug and alcohol treatment center.
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Frequently asked questions
A:
- Alcohol does not require digestion. About 20% is absorbed into the bloodstream through the stomach, while the other 80% passes into the small intestine, where it is absorbed faster.
- Alcohol affects each person differently, and it affects the same person differently on different occasions. Factors such as gender, mood, physical condition, and speed of consumption influence how quickly a person becomes intoxicated.
- Alcohol is toxic to the developing fetus and is a leading preventable cause of intellectual disability. Even drinking a small amount daily during pregnancy can lead to decreased birth weights and spontaneous abortions.
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