Substance Abuse Flashcards
What is the definition of a psychoactive drug or psychotropic substance?
A psychoactive drug or psychotropic substance is a chemical that acts on the CNS, altering brain function and causing temporary changes in perception, mood, consciousness, and behaviour.
How is a drug defined?
A drug is any substance that causes physiological changes in the body when inhaled, injected, smoked, consumed, absorbed, or dissolved under the tongue.
What is a substance use disorder?
A substance use disorder is a medical condition where the use of one or more substances leads to clinically significant impairment or distress.
What are the key symptoms of substance use disorders?
Symptoms of substance use disorders include mental, physical, and behavioural impairments.
How are psychoactive substances classified?
Psychoactive substances are classified into depressants, stimulants, hallucinogens, and solvents.
What are the effects of depressants on the central nervous system (CNS)?
Depressants decrease CNS activity, reduce consciousness, lower heart rate, blood pressure, and respiratory rate, and cause lack of coordination and slurred speech.
What are some examples of depressants?
Examples of depressants include barbiturates, benzodiazepines, alcohol, cannabis, and opiates.
How do stimulants affect the central nervous system?
Stimulants increase CNS activity, raising heart rate, blood pressure, alertness, and energy levels, and can cause restlessness.
Name some common stimulants.
Common stimulants include amphetamines, methamphetamines, ecstasy, cocaine, caffeine, and kola nut.
What are hallucinogens, and what effects do they cause?
Hallucinogens, or psychedelics, cause distorted perceptions and labile mood changes.
Provide examples of hallucinogens.
Examples of hallucinogens include LSD, psilocybin, magic mushrooms, ecstasy, peyote, PCP, marijuana, synthetic cannabinoids, and ketamine.
What is the difference between licit and illicit substances?
Licit substances are legally permitted, while illicit substances are illegal and unauthorised.
Why are substances addictive?
Substances are addictive because they activate the brain’s reward system, which is designed to satisfy survival needs.
What is the brain’s reward system, and how does it relate to addiction?
The brain’s reward system, primarily involving dopamine release, reinforces behaviours that trigger pleasurable feelings, leading to repeated use of substances.
How does the brain’s reward circuitry get hijacked by substance use disorders?
Substance use disorders hijack the reward circuitry, rewiring the brain to prioritise substance use over other behaviours.
What is tolerance in the context of substance use?
Tolerance is a state where a drug produces a decreased effect after repeated use, or where higher doses are needed to achieve the same effect.
Define withdrawal in substance use.
Withdrawal is a group of symptoms that occur when a drug is reduced or withdrawn, with the nature of symptoms depending on the substance class.
What are the key features of acute intoxication?
Acute intoxication is a transient condition following the use of alcohol or psychoactive substances, causing disturbances in consciousness, cognition, perception, affect, behaviour, and other psychophysiological functions.
What is harmful use of psychoactive substances?
Harmful use is a pattern of psychoactive substance use that damages health, either physically or mentally.
Define dependence syndrome.
Dependence syndrome is characterised by a higher priority given to substance use than other behaviours, with a strong desire to take psychoactive drugs, alcohol, or tobacco.
What are the diagnostic guidelines for dependence syndrome?
Dependence syndrome is diagnosed if three or more criteria, such as strong desire, loss of control, withdrawal, tolerance, neglect of other interests, and persistence despite harm, are met in the past year.
What is the global prevalence of substance use disorders?
Substance use disorders are prevalent worldwide, affecting people of all ages, races, cultures, and economic backgrounds.
What are some key findings from the U.S. regarding substance use?
In the U.S., lifetime prevalence of substance use in individuals aged 12 or older was 46.4%, with higher use among the unemployed and 16-25-year-olds, and cannabis was the most commonly used illicit drug.
Describe the epidemiology of substance use in Europe.
In Europe, lifetime prevalence of substance use was 42% in 15-16-year-old pupils, with a strong association between cigarette smoking and cannabis use.
What are the key epidemiological findings regarding substance use in Nigeria?
In Nigeria, studies show alcohol is the most commonly abused licit drug, followed by cannabis as the most commonly abused illicit drug.
How does substance use vary across different social classes?
Substance use cuts across all social classes, with some classes favouring specific combinations, like students preferring cannabis.
What is the relationship between gender and substance use?
Drug abuse and dependence are higher in males compared to females, with a 7.8% vs. 4.4% ratio.
How does employment status influence substance use?
Substance use disorders are more common in unemployed individuals and minority groups.
How does occupation relate to substance use?
Substance use is more common in medical professionals than in non-medical professionals of similar training levels.
Describe the relationship between substance use and urban areas.
Substance use is higher in disadvantaged areas of large cities.