Alcohol and Nicotine Lecture Notes

Alcohol and the Body

Alcohol Overview

  • Definition: Alcohol is the intoxicating ingredient found in fermented or distilled beverages.

  • Types of Alcoholic Beverages:

    • Beer: Contains 3–6% alcohol by volume (ABV).

    • Ales and Malt Liquors: Contain 6–8% ABV.

    • Wines: Contain 9–14% ABV.

    • Fortified Wine (e.g., sherry, port, Madeira): 20% ABV.

    • Hard Liquors: Contain 35–50% ABV.

  • Proof Value: Represents the alcohol content, calculated as twice the percentage concentration.

    • Example: A 100-proof beverage contains 50% ABV.

Standard Drinks and Caloric Content

  • Standard Drink Measurement:

    • One drink generally contains 0.6 ounces of alcohol.

    • Typical servings are often larger than a standard drink.

  • Caloric Content:

    • Alcohol provides approximately 7 calories per gram.

    • Each drink contributes about 100–120 calories.

    • “Light” in light beer refers to its lower caloric content.

Absorption of Alcohol

  • Factors Influencing Absorption Rate:

    • Presence of food in the stomach slows absorption.

    • Carbonation and artificial sweeteners enhance absorption speed.

    • High concentrations of alcohol delay absorption.

    • Biological factors such as sex, race, and ethnicity also affect absorption rates.

  • Absorption Locations:

    • About 20% of alcohol is absorbed in the stomach.

    • Approximately 75% is absorbed in the upper part of the small intestine.

    • Remaining alcohol enters the bloodstream farther along the gastrointestinal tract (GI).

  • Feelings of Intoxication: Once alcohol is in the bloodstream, it produces sensations of intoxication.

Metabolism and Excretion of Alcohol

  • Transport: Alcohol travels through the circulatory system and can easily cross biological membranes.

  • Metabolism: The liver is the main site for alcohol metabolism.

    • 2–10% of ingested alcohol is not metabolized in the liver and is excreted unchanged by the lungs, kidneys, and sweat glands.

  • Impact on the Brain:

    • Alcohol affects neurotransmitters, which are chemicals that carry messages between brain cells.

    • Heavy alcohol use can lead to loss of brain function and changes in brain structure.

Alcohol Intake and Blood Alcohol Concentration (BAC)

  • BAC Defined: Blood alcohol concentration (BAC) refers to the ratio of alcohol in a person's blood by weight.

  • Influencing Factors:

    • Affected by body weight, percentage of body fat, and biological sex.

    • The balance between alcohol absorbed and the rate of metabolism also plays a role.

    • Individual metabolism rates can vary based on genetic factors and drinking behaviors.

  • Myth Busting: BAC is not influenced by exercise, deep breathing, eating, drinking coffee, using other drugs, or sleep.

Visual Representations of BAC

  • Figure 9.1: Approximate BAC and body weight chart illustrating the BAC an average person of a specified weight reaches after consuming drinks within given timeframes.

    • Legal limit for BAC for drivers is 0.08% in most states; zero-tolerance laws for those under 21 typically set BAC at 0.01% or 0.02%.

  • Figure 9.2: Effects of BAC on stages of intoxication (not detailed).

Immediate and Long-Term Effects of Alcohol

Immediate Effects

  • Effects vary depending on the individual, circumstances, and quantity consumed.

  • Low BAC (0.02–0.05%): Lightheadedness, relaxation, and release of inhibitions.

  • Moderate BAC (0.1–0.2%): Reduced sensory and motor functioning; drowsiness; decreased sensory acuity (vision, smell, taste, hearing); depression of central nervous system and muscles.

  • High BAC (0.35% and above): Risk of coma or fatality.

  • Alcohol Hangover Symptoms: Include headache, shakiness, nausea, diarrhea, fatigue, and impaired mental functioning.

  • Alcohol Poisoning: Rapid consumption can elevate BAC to lethal levels, even during unconsciousness.

  • Alcohol and Drugs: Combinations can lead to severe outcomes; alcohol is linked to many drug-related fatalities.

  • Alcohol-Related Violence: Strong associations with homicide, suicide, traumatic incidents, and aggressive behavior.

  • Sexual Decision-Making: Increases the likelihood of unprotected and unplanned sexual encounters.

  • Binge Drinking: Defined as drinking patterns that elevate BAC to 0.08% or higher within two hours (five or more drinks for men, four for women).

    • Associated with heightened rates of sexually transmitted infections and sexual assault risks.

Long-Term Effects

  • Binge Drinking Statistics (2020): ~30% of Americans aged 18-25 reported binge drinking in the past month; nearly 9% reported heavy drinking.

  • Impact of Drinking and Driving: 10,142 deaths from alcohol-impaired accidents in 2019.

    • Impulsivity and dose-response function elevate crash risks—higher alcohol doses greatly increase crash probability.

Long-Term Health Implications of Alcohol Misuse

Digestive System

  • Liver Damage: Can lead to conditions such as fatty liver, alcohol-associated hepatitis, and cirrhosis.

    • Cirrhosis: A severe liver condition caused by alcohol or other factors.

  • Pancreas: Inflamed pancreas due to chronic alcohol use.

Cardiovascular System

  • Blood Pressure: Elevated levels with high consumption may cause cardiac myopathy and other complications.

  • “Holiday Heart”: Irregular heart rhythms observed following a binge episode.

Cancer Risks

  • Increased Risks: Alcohol misuse raises risks for cancers including those of the mouth, throat, larynx, esophagus, breast, colorectal cancers, and liver cancer respectively.

    • A significant alcohol consumption combined with smoking increases cancer risk by a factor of 50 or more.

Brain Damage and Mortality

  • People with Alcohol Use Disorder (AUD) often experience cognitive impairments; life expectancy is ~15 years shorter than non-users.

Summary of Immediate and Chronic Effects

  • Central Nervous System: Impaired reaction time, judgment, and motor coordination; risks of coma/death at high BACs.

  • Chronic Effects on Health: Damage to brain cells, cardiovascular complications, gastrointestinal damage, weakened immune function, and risks of numerous cancers.

Alcohol Use During Pregnancy

  • Fetal Impact: Alcohol crosses the placenta, potentially causing miscarriage or fetal alcohol syndrome (FAS), which leads to lifelong disabilities.

  • No Safe Level: No alcohol consumption during nursing is considered safe as it enters breast milk.

Possible Health Benefits of Alcohol

  • Heart Health Practices: Best practices advocate for abstaining from alcohol; the risk of heart disease increases significantly with consumption exceeding 7 drinks weekly.

Understanding Alcohol Use Disorder (AUD)

Diagnostic Criteria (DSM-5)

  • Minimum of two criteria indicating AUD includes:

    • Consumed in large quantities over long periods.

    • Unsuccessful control over alcohol use.

    • Excessive time spent recovering from effects.

    • Strong cravings and fulfilling obligations hindered.

    • Drop in social/recreational activities.

    • Risky usage patterns despite knowledge of issues.

    • Symptoms of withdrawal and increased tolerance.

Severity of AUD

  • Alcohol Misuse: Characterized by negative consequences affecting daily life.

  • Warning Signs of AUD: Secretive drinking, self-medicating with alcohol, increased consumption, and regular intoxication are crucial indicators.

Addressing Binge Drinking

  • Binge drinking leads to significant fatalities and economic burdens concerning excessive alcohol consumption.

Severe Alcohol Use Disorder Typologies

  • Common Patterns of Use:

    • Daily heavy intake.

    • Weekend binge drinking.

    • Interspersed sobriety followed by heavy periods.

    • Stress-linked heavy drinking.

  • Withdrawal Symptoms: Severe withdrawal includes seizures and hallucinations (delirium tremens). Additional issues involve nutrient deficiencies and blackouts.

Treatment Options for AUD

Supportive Programs

  • No universal program exists; options include:

    • Alcoholics Anonymous (AA): A 12-step program.

    • Rational Recovery and Women for Sobriety: Focus on self-empowerment.

    • Moderation management approaches and caregiver support groups like Al-Anon and Alateen.

    • Inpatient rehabilitation programs.

Pharmacotherapy Treatments

  • Disulfiram (Antabuse): Prevents normal metabolic breakdown of alcohol.

  • Naltrexone: Reduces enduring cravings, available in injectable form (Vivitrol).

  • Acamprosate: Targets brain pathways related to craving.

Socio-Demographic Factors in Alcohol Use

Gender Differences

  • Men: Higher likelihood of alcohol misuse and AUD development; most related deaths involve men.

  • Women: Develop AUD later in life; often face unique health complications.

Racial/Ethnic Disparities

  • Native Americans: Highest rates of AUD exacerbated by historical trauma and stressors.

  • Black Americans: Use is less prevalent but have high vulnerability to alcohol-related issues.

  • Hispanic Americans: Variances in drinking patterns based on cultural backgrounds.

  • Asian Americans: Lower rates of alcohol misuse due to physiological aversions.

Supporting Individuals with Alcohol Problems

  • Help by providing information on resources like campus counseling centers and local AA chapters.

Tobacco Use

Who Uses Tobacco?

  • Smoking rates vary by gender, age, race, ethnicity, and education; lesser-educated adults show higher smoking rates.

  • Electronic cigarettes are particularly popular among young adults aged 18–24.

Why People Use Tobacco?

  • Tobacco Definition: Leaves cultivated for smoking, chewing, or snuff use.

  • Nicotine Addiction: Primary reason for tobacco use; measures include significant rapid delivery to the brain and psychological reinforcement.

  • Addiction Features: Users exhibit loss of control, ongoing schedules centered around nicotine intake, and tolerance and withdrawal effects.

Initiation of Tobacco Use

  • Youth Initiation Patterns: The majority of adult smokers began smoking before 18; peer influence is the most significant factor.

  • Rationalizations for Use: Youth underestimations of addiction and diminished perceived risks contribute to substance initiation.

Health Hazards of Tobacco

  • Toxic Constituents: Tobacco smoke is harmful—consisting of thousands of chemical substances, including known carcinogens and poisons like arsenic and cyanide.

  • Health Risks: Tobacco usage yields numerous health conditions: cardiovascular diseases, various cancers, COPD, dental issues, and psychological impacts related to addiction.

The Tobacco Hazard Spectrum

Immediate Effects

  • New smokers often exhibit symptoms of mild nicotine poisoning—dizziness, nausea, and rapid pulse.

Long-Term Effects on Health

  • Cardiovascular Diseases: Includes heart ailments, atherosclerosis, and among electronic cigarette users, increased cardiac risks.

  • Cancer: Leading contributor to lung cancer and multiple types of other cancers.

  • Economic Costs: Smoking can result in significant financial strain; costs of maintaining smoking habit may exceed $3600 annually.

Environmental and Third-Hand Smoke Effects

  • Environmental Tobacco Smoke (ETS): Identified by the EPA as a Class A carcinogen with no minimal exposure safe levels.

  • Third-Hand Smoke Effects: Dangerous residues affecting indoor environments and leading to pollution-induced health issues.

Smoking and Pregnancy

  • Health implications for developing fetuses include lower birth weight and behavioral issues.

Combatting Tobacco Use

  • Prevention Strategies: Anti-tobacco legislation and collective action can mitigate tobacco use while individually tailored cessation techniques can help users quit.

Quitting Tobacco

  • Immediate benefits after quitting include reduced blood pressure and improved oxygen levels alongside other long-term health improvements.

Review and Summary

  • Key takeaways include understanding the impact of alcohol and tobacco on health, recognizing patterns in usage, and emphasizing prevention and support strategies for individuals with substance use issues. (Note: This summation captures the key insights required for better comprehension of the content concerning alcohol and tobacco. It provides a deeper understanding to facilitate academic discussions and personal analyses.)