Substance Use Disorders — MCQs

Substance Use Disorders Indian Medical PG Practice Questions and MCQs

Question 421: Tolerance to substances is seen in which of the following?

A. Obsessive-compulsive disorder
B. Physiological dependence (Correct Answer)
C. Hypochondriasis
D. Psychological dependence

Explanation: ***Physiological dependence*** - **Tolerance** is a hallmark feature of physiological dependence, where the body adapts to a substance, requiring increasingly larger doses to achieve the initial effect. - It involves neurobiological adaptations in the brain in response to chronic substance use. - Physiological dependence is characterized by both **tolerance** and **withdrawal symptoms** as key features. *Hypochondriasis* - This is a mental disorder characterized by an excessive preoccupation with having a serious illness, despite medical reassurance. - It does not involve substance use or development of tolerance to a substance. *Obsessive-compulsive disorder* - OCD is an anxiety disorder marked by recurrent unwanted thoughts (**obsessions**) and repetitive behaviors (**compulsions**). - It is not related to substance use, tolerance, or dependence. *Psychological dependence* - Psychological dependence involves a strong emotional or mental desire for a drug, characterized by craving and compulsive drug-seeking behavior. - While psychological dependence can coexist with tolerance, the primary feature is the **emotional craving** rather than the physical adaptation. - **Physiological dependence** more directly encompasses tolerance as a defining characteristic, along with physical withdrawal symptoms.

Question 422: Which of the following is not a feature of Korsakoff's syndrome?

A. Retrograde amnesia
B. Confabulation
C. Anterograde amnesia
D. Motor skill deficits (Correct Answer)

Explanation: ***Motor skill deficits*** - While Korsakoff's syndrome is associated with neurological damage, it primarily affects **memory and cognitive functions**, not motor skills directly. - **Motor skill deficits** are not a core diagnostic feature of this syndrome. *Confabulation* - **Confabulation**, the production of fabricated, distorted, or misinterpreted memories without the conscious intention to deceive, is a **hallmark symptom** of Korsakoff's syndrome. - Patients often fill memory gaps with plausible but false narrative. *Retrograde amnesia* - Patients with Korsakoff's syndrome typically experience **retrograde amnesia**, meaning they have difficulty recalling events and information that occurred **before the onset** of the condition. - This affects memories of varying degrees and periods. *Anterograde amnesia* - **Anterograde amnesia**, the inability to form new memories after the onset of the condition, is a primary and **defining feature** of Korsakoff's syndrome. - Patients often forget recent events or new information almost as soon as it is presented.

Question 423: Which of the following statements is most true regarding Korsakoff syndrome?

A. Intellectual decline is present.
B. Chronic amnestic syndrome is a feature. (Correct Answer)
C. None of the options.
D. Can be seen in chronic alcoholics.

Explanation: ***Chronic amnestic syndrome is a feature.*** - **Chronic amnestic syndrome** is THE DEFINING feature of Korsakoff syndrome, making this the most true statement. - The hallmark clinical features include **severe anterograde amnesia** (inability to form new memories), **variable retrograde amnesia**, and **confabulation**. - **General intelligence, social skills, and executive functions** are typically preserved, distinguishing it from dementia. - This amnestic syndrome is present regardless of the etiology and is the primary diagnostic criterion. *Can be seen in chronic alcoholics.* - This statement is true but less specific than the correct answer. - **Chronic alcoholism** is the most common cause of Korsakoff syndrome due to **thiamine (vitamin B1) deficiency** from poor nutrition and impaired absorption. - However, Korsakoff syndrome can also result from other causes of thiamine deficiency (hyperemesis gravidarum, malnutrition, gastrointestinal malabsorption, malignancy). - The association with alcoholism is about etiology, not the defining feature of the syndrome itself. *Intellectual decline is present.* - This is misleading and largely incorrect. - Unlike dementia, Korsakoff syndrome shows **preserved general intelligence (IQ)** and intact cognitive abilities outside of memory. - Patients can maintain normal conversation, reasoning, and social skills despite profound memory deficits. - The cognitive impairment is specifically related to **memory encoding and retrieval**, not generalized intellectual decline. *None of the options.* - This is incorrect as multiple statements are true, particularly the statement about chronic amnestic syndrome being a feature.

Question 424: Which of the following is NOT a characteristic feature of delirium tremens?

A. Severe depression (Correct Answer)
B. Extreme anxiety
C. Delusion
D. Hallucination

Explanation: ***Severe depression*** - While mood disturbances can occur with alcohol withdrawal, **severe depression** is not a hallmark or defining feature of **delirium tremens (DTs)** itself. - DTs primarily manifest as severe autonomic hyperactivity, altered mental status, and perceptual disturbances. *Hallucination* - **Hallucinations**, particularly **visual** (e.g., seeing insects or small animals), are a classic and common feature of delirium tremens. - These perceptual disturbances contribute significantly to the agitated and disoriented state of patients experiencing DTs. *Extreme anxiety* - **Extreme anxiety**, agitation, and fear are very common in delirium tremens due to the heightened state of arousal and terrifying hallucinations. - This **hyperarousal** is a direct result of the severe autonomic dysregulation. *Delusion* - **Delusions**, often **paranoid** or referring to being persecuted, are frequently observed in patients with delirium tremens. - These fixed, false beliefs contribute to the patient's confusion, fear, and sometimes aggressive behavior.

Question 425: Headache, behavioral changes, schizophrenia-like psychosis, visual hallucinations, and paranoid symptoms are seen in intoxication or abuse of?

A. Amphetamines (Correct Answer)
B. Heroin
C. Cocaine
D. Cannabis

Explanation: ***Amphetamines*** - **Amphetamine intoxication** can cause a range of neuropsychiatric symptoms, including **headache**, **behavioral changes**, **paranoia**, and **schizophrenia-like psychosis** due to excessive dopamine release. - **Visual hallucinations** are also a common feature, reflecting severe neurochemical imbalance in the brain. *Cocaine* - While cocaine intoxication can cause **paranoia** and **psychosis**, **headache** and severe **schizophrenia-like psychosis** with prominent visual hallucinations are more characteristic of chronic amphetamine abuse. - Cocaine's effects are typically shorter-acting and often involve increased heart rate and blood pressure, with CNS effects that may not be as prolonged or severe as amphetamines in terms of psychosis. *Heroin* - Heroin is an **opioid** that primarily causes central nervous system **depression**, leading to sedation, constricted pupils, and respiratory depression. - It is **not associated with headache, behavioral changes, or schizophrenia-like psychosis with hallucinations** as described in the question. - Opioid intoxication presents with the classic triad of CNS depression, miosis (pinpoint pupils), and respiratory depression. *Cannabis* - **Cannabis** can induce **psychotic symptoms** and paranoia in some individuals, especially with high doses or in predisposed individuals, but a full-blown **schizophrenia-like psychosis** with severe behavioral changes and visual hallucinations as described is not its typical presentation, and headache is not a defining feature of cannabis intoxication. - Its effects are more commonly associated with altered perception, euphoria, and impaired coordination.

Question 426: Which substance is associated with the flashback phenomenon in the context of drug use?

A. Cocaine
B. Amphetamine
C. Heroin
D. LSD/Hallucinogens (Correct Answer)

Explanation: ***LSD/Hallucinogens*** - **Flashback phenomenon** or **Hallucinogen Persisting Perception Disorder (HPPD)** is specifically associated with hallucinogens like **LSD**, causing re-experiencing of perceptual distortions long after drug cessation. - These episodes can be triggered by **stress** or **fatigue** and occur without recent drug use or underlying psychiatric disorders. *Cocaine* - Cocaine is a **stimulant** that blocks dopamine reuptake, causing euphoria and increased energy but not flashbacks. - Associated complications include **psychosis** and **paranoia**, but not the characteristic re-experiencing of perceptual distortions. *Amphetamine* - Another **stimulant** that increases dopamine and norepinephrine release, causing alertness and euphoria. - Can cause **amphetamine psychosis** with chronic use, but **flashback phenomenon** is not a recognized effect. *Heroin* - An **opioid** that binds to opioid receptors, producing euphoria followed by sedation and respiratory depression. - Associated with **addiction** and **overdose** risks, but not with flashback experiences or perceptual distortions.

Question 427: Which of the following is NOT a symptom of nicotine withdrawal?

A. Irritability
B. Difficulty concentrating
C. Decreased appetite (Correct Answer)
D. Anxiety

Explanation: ***Decreased appetite*** - Nicotine withdrawal typically leads to **increased appetite**, often resulting in weight gain after quitting smoking. - This is one of the most consistent symptoms of nicotine withdrawal, with individuals commonly craving snacks and sugary foods. - **Decreased appetite is NOT a symptom** of nicotine withdrawal; rather, the opposite occurs. *Irritability* - **Irritability** is a core DSM-5 criterion for nicotine withdrawal syndrome. - Individuals commonly experience **frustration, anger, and mood disturbances** as the body adjusts to the absence of nicotine. - This symptom typically peaks within the first week of cessation. *Difficulty concentrating* - **Cognitive impairment**, particularly difficulty concentrating, is a well-established symptom of nicotine withdrawal. - Users often report **impaired focus, decreased attention span, and mental fog** during the withdrawal period. - This reflects nicotine's effects on cholinergic neurotransmission in the brain. *Anxiety* - **Anxiety** is a prominent and distressing symptom during nicotine withdrawal. - Individuals experience **nervousness, restlessness, and heightened stress** as nicotine's anxiolytic effects wear off. - This symptom is recognized in both DSM-5 and ICD-11 diagnostic criteria for nicotine withdrawal.

Question 428: Which of the following is a validated screening tool for alcohol use disorder?

A. AUDIT
B. CAGE questionnaire
C. SADQ
D. All of the options (Correct Answer)

Explanation: ***CAGE questionnaire and AUDIT*** - Both **CAGE** and **AUDIT** are widely validated screening tools specifically designed for alcohol use disorder [1]. - **CAGE** is a brief 4-item tool focusing on **C**ut down, **A**nnoyed, **G**uilty, and **E**ye-opener - ideal for quick screening in clinical settings [1]. - **AUDIT** (Alcohol Use Disorders Identification Test) is a comprehensive 10-item tool assessing consumption patterns, drinking behaviors, and alcohol-related problems. - AUDIT is considered the **gold standard** for screening and can assess risk levels and severity. *Why not SADQ alone?* - **SADQ** (Severity of Alcohol Dependence Questionnaire) is primarily a **severity assessment tool**, not a screening tool. - It is a 20-item instrument used to measure the **degree of alcohol dependence** in individuals already identified with alcohol problems. - While valuable for treatment planning, SADQ is more detailed and designed for assessment rather than initial screening [1]. - However, all three tools are validated and used in alcohol use disorder evaluation - CAGE and AUDIT for screening, SADQ for severity assessment.

Question 429: A patient presents to the emergency department with vomiting, diarrhea, lacrimation, abdominal cramps, and piloerection. The family members report a history of substance use for the past month. The clinical presentation is due to what?

A. opioid withdrawal (Correct Answer)
B. cocaine intoxication
C. cocaine withdrawal
D. opioid intoxication

Explanation: ***Opioid withdrawal*** - The constellation of **vomiting, diarrhea, lacrimation, abdominal cramps, and piloerection** (gooseflesh) are classic signs and symptoms of **opioid withdrawal**. - These symptoms reflect a **hyperactive sympathetic nervous system** as the body attempts to compensate for the absence of exogenous opioids. *Cocaine intoxication* - Cocaine intoxication typically presents with **euphoria, hyperactivity, tachycardia, hypertension, and paranoia**, which are not seen here. - It is characterized by **sympathomimetic effects**, leading to an agitated and stimulated state, rather than the distress seen in withdrawal. *Cocaine withdrawal* - Cocaine withdrawal typically manifests as **dysphoria, fatigue, increased appetite, psychomotor retardation or agitation, and vivid unpleasant dreams**, not the GI and autonomic symptoms described. - The primary symptoms are psychological and energetic, often described as a "crash" rather than the physical distress of opioid withdrawal. *Opioid intoxication* - Opioid intoxication primarily causes **CNS depression**, including **respiratory depression, meiosis (pinpoint pupils), sedation, and constipation**. - The patient's symptoms of vomiting, diarrhea, and lacrimation are contrary to the effects of opioid intoxication.

Question 430: Chronic disorder characterized by compulsive use of drugs, resulting in physical, psychological, and social harm, and continued use despite evidence that it is harmful is called.

A. Substance intoxication
B. Drug addiction (Correct Answer)
C. Drug abuse
D. Drug dependence

Explanation: ***Drug addiction*** - This definition accurately describes **drug addiction** as a chronic disorder involving compulsive drug use despite harmful consequences across physical, psychological, and social domains. - Key components include the **compulsive nature** of use, the **harmful outcomes**, and the persistence of use even with awareness of these harms. *Substance intoxication* - **Substance intoxication** refers to the acute, reversible effects of a substance on the central nervous system, leading to clinical changes in perception, mood, and behavior. - It does not encompass the chronic, compulsive use or the long-term physical, psychological, and social harms characteristic of addiction. *Drug abuse* - **Drug abuse** is a pattern of harmful use of a psychoactive substance, but it doesn't necessarily include the compulsive, chronic nature and the concept of continued use despite acknowledging harm that defines addiction. - The term "abuse" is often considered outdated in favor of "substance use disorder" in clinical contexts to better reflect the chronic disease model. *Drug dependence* - **Drug dependence** refers to a physiological state where the body adapts to a substance, leading to **withdrawal symptoms** if the substance is stopped and **tolerance** to its effects. - While it is a component of addiction, it does not fully capture the compulsive drug-seeking behavior or the broader psychological and social harms that define addiction itself.

Practice by Chapter

Neurobiology of Addiction

Practice Questions

Alcohol Use Disorder

Practice Questions

Opioid Use Disorder

Practice Questions

Cannabis Use Disorder

Practice Questions

Stimulant Use Disorders

Practice Questions

Sedative, Hypnotic, and Anxiolytic Use Disorders

Practice Questions

Tobacco Use Disorder

Practice Questions

Hallucinogen-Related Disorders

Practice Questions

Substance Withdrawal Syndromes

Practice Questions

Pharmacotherapy for Substance Use Disorders

Practice Questions

Psychosocial Interventions

Practice Questions

Dual Diagnosis Management

Practice Questions

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