Substance Use Disorders — MCQs

Substance Use Disorders Indian Medical PG Practice Questions and MCQs

Question 371: All are true about delirium tremens, except:

A. Clouding of consciousness
B. Visual hallucinations
C. Normal sleep-wake cycle (Correct Answer)
D. Coarse tremors

Explanation: ***Normal sleep wake cycle*** - Delirium tremens is characterized by a **disrupted sleep-wake cycle**, often with **insomnia** and **nocturnal exacerbation** of symptoms, making a normal sleep-wake cycle an incorrect statement. - The brain's regulatory mechanisms for sleep are significantly impaired due to the withdrawal of alcohol's suppressive effects. *Clouding of consciousness* - **Clouding of consciousness** is a hallmark feature of delirium tremens, representing a reduced awareness of the environment and impaired attention. - Patients often present with **disorientation** regarding time, place, and person. *Visual hallucinations* - **Visual hallucinations** are very common in delirium tremens, often described as vivid, frightening, and involving small animals or insects. - These hallucinations contribute to the patient's **agitation** and fear. *Coarse tremors* - **Coarse tremors**, particularly of the hands and face, are a classic physical sign of alcohol withdrawal and an integral part of delirium tremens. - These tremors are due to the **overactivity of the sympathetic nervous system** as the inhibitory effects of alcohol wear off.

Question 372: Most common symptom of alcohol withdrawal is:

A. Diarrhea
B. Rhinorrhea
C. Tremor (Correct Answer)
D. Bodyache

Explanation: ***Tremor*** - **Tremor** is one of the earliest and most common symptoms of alcohol withdrawal, often appearing within 6-12 hours after reduction or cessation of alcohol intake. - This symptom is due to hyperactivity of the central nervous system as it attempts to re-establish homeostasis without the depressant effects of alcohol. *Diarrhea* - While gastrointestinal issues can occur during alcohol withdrawal, **diarrhea** is not considered the most common or primary symptom. - Other more prominent symptoms related to central nervous system excitation typically precede or overshadow GI complaints. *Rhinorrhea* - **Rhinorrhea (runny nose)** is not a characteristic or common symptom of alcohol withdrawal. - This symptom is more commonly associated with opioid withdrawal or allergic reactions. *Bodyache* - **Body aches** can be a general symptom of discomfort or fatigue during withdrawal states, but it is not the most specific or common symptom of alcohol withdrawal. - Muscle cramps or myalgia can occur, but generalized body aches are less frequent than more distinct neurological manifestations.

Question 373: Delusion of persecution and formication occur together in

A. LSD
B. Cocaine (Correct Answer)
C. Amphetamine
D. Cannabis

Explanation: ***Cocaine*** - **Chronic cocaine abuse** can lead to **paranoid delusions** (delusions of persecution) and tactile hallucinations such as **formication** (sensation of insects crawling under the skin, called "**cocaine bugs**"). - These symptoms occur together in **cocaine-induced psychosis**, which can mimic **paranoid schizophrenia**. - The combination of **paranoid delusions with formication** is a classical presentation of **stimulant psychosis**, seen with cocaine. *Amphetamine* - **Amphetamine/methamphetamine abuse** can also cause **psychotic symptoms** including paranoia, delusions of persecution, and formication ("**meth mites**"). - While both cocaine and amphetamine can cause this combination, **cocaine** is the **traditional answer** in medical examinations for this specific combination of symptoms. - Clinically, amphetamine-induced formication is increasingly recognized. *LSD* - **Lysergic acid diethylamide (LSD)** primarily causes **visual hallucinations**, altered perceptions, and synesthesia. - While LSD can induce paranoia and anxiety, **delusions of persecution** and **formication** are not typical features. - LSD effects are more perceptual distortions than true psychotic symptoms. *Cannabis* - **Cannabis use** can sometimes induce **acute psychotic episodes** in vulnerable individuals, particularly with high-potency preparations. - Cannabis effects include **anxiety**, **paranoia**, and **depersonalization**. - **Formication** and prominent **delusions of persecution** are not characteristic of cannabis intoxication.

Question 374: Dipsomania is usually used in context of:

A. Any of the above
B. Tonics
C. Alcohol (Correct Answer)
D. Liquids

Explanation: ***Alcohol*** - **Dipsomania** is a historical psychiatric term used to describe an insatiable, **periodic craving for alcohol** - It refers specifically to episodes of **compulsive alcohol consumption**, distinct from continuous heavy drinking - The term originates from Greek: "dipsa" (thirst) + "mania" (madness) *Any of the above* - The term **dipsomania** is not broadly applicable to any substance or beverage - Its historical and clinical usage is **specifically tied to excessive alcohol intake** - This is not a general term for any form of substance craving *Tonics* - **Dipsomania** does not refer to a craving for tonics, which are typically medicinal or health-promoting beverages - The context of tonics does not involve the compulsive and harmful patterns associated with dipsomania - No psychiatric literature supports this association *Liquids* - While alcohol is a liquid, **dipsomania** is not a general term for craving any liquid - It denotes a **specific pathological craving for an intoxicating substance** (alcohol), not simple hydration - The term refers to the alcoholic content, not the liquid form

Question 375: The term 'cocaine bugs' refers to:

A. Othello syndrome
B. Ekbom's syndrome (Correct Answer)
C. Cotard's syndrome
D. De Clérambault syndrome

Explanation: ***Ekbom's syndrome*** - The term **"cocaine bugs"** refers to **formication** - tactile hallucinations of insects crawling on or under the skin, commonly experienced during cocaine intoxication or withdrawal. - While formication itself is a **hallucination** (false sensory perception), chronic cocaine users may develop **Ekbom's syndrome (delusional parasitosis)** - a fixed false belief of being infested by parasites. - Among the given options, Ekbom's syndrome is the most closely associated with the phenomenon of "cocaine bugs," though technically the term specifically describes the tactile hallucinations rather than the delusional disorder itself. *Othello syndrome* - This is a form of **delusional jealousy**, where an individual falsely believes their partner is unfaithful without any real evidence. - It is not associated with tactile hallucinations or the sensation of insects crawling on the skin. *Cotard's syndrome* - This is a rare mental disorder in which a person holds the **nihilistic delusion** that they are dead, do not exist, are putrefying, or have lost their blood or internal organs. - It is distinct from the tactile hallucinations or parasitosis delusions described as "cocaine bugs." *De Clérambault syndrome* - Also known as **erotomania**, this is a delusion in which an individual believes that another person, usually of higher social status, is in love with them. - This condition does not involve tactile hallucinations or the sensation of parasitic infestation.

Question 376: In chronic alcoholism and its complications, which of the following is seen?

A. Wernicke's syndrome
B. Delirium tremens
C. Korsakoff psychosis
D. All of the options (Correct Answer)

Explanation: ***All of the options*** - **Wernicke's syndrome**, **Delirium tremens**, and **Korsakoff psychosis** are all well-recognized neurological and psychiatric complications associated with **chronic alcoholism** - Chronic alcohol abuse leads to nutritional deficiencies (especially **thiamine deficiency**) and neurotoxicity, predisposing individuals to these distinct but related conditions *Wernicke's syndrome* - Acute neurological disorder caused by **thiamine deficiency** - Characterized by classic triad: **ataxia**, **ophthalmoplegia**, and **confusion** - If untreated, can progress to **Korsakoff psychosis** *Delirium tremens* - Severe form of **alcohol withdrawal** in individuals with long history of heavy drinking - Symptoms include **delirium**, **severe agitation**, **tremors**, **hallucinations**, and autonomic hyperactivity (**tachycardia**, **hypertension**, **fever**) - Medical emergency requiring prompt treatment *Korsakoff psychosis* - Occurs due to chronic **thiamine deficiency**, often following Wernicke's encephalopathy - Characterized by severe **anterograde and retrograde amnesia**, **confabulation**, and relative preservation of other cognitive functions - Often results in permanent cognitive impairment

Question 377: Which of the following sites is responsible for the amnestic defect in Wernicke-Korsakoff syndrome?

A. Mamillary body (Correct Answer)
B. Thalamus
C. Subthalamic nucleus
D. Medial forebrain bundle

Explanation: ***Mamillary body*** - The **mamillary bodies** are the **classically recognized** anatomical substrate for the **amnestic defect** in Wernicke-Korsakoff syndrome due to their crucial role in the Papez circuit and memory formation. - Damage to these structures, caused by **thiamine deficiency**, severely impairs the ability to form new memories (anterograde amnesia) and recall past memories (retrograde amnesia). - Bilateral mamillary body lesions are consistently found in Wernicke-Korsakoff syndrome and correlate strongly with memory impairment. *Thalamus* - The **mediodorsal nucleus of the thalamus** is also critically involved in Wernicke-Korsakoff syndrome and plays a significant role in the memory deficit. - Modern research shows that thalamic damage (particularly mediodorsal nucleus) correlates strongly with amnesia severity and may contribute equally to the memory impairment. - However, **mamillary bodies** remain the **classic exam answer** when identifying the primary site for amnestic defects in this syndrome. *Subthalamic nucleus* - The **subthalamic nucleus** is primarily involved in **motor control** and is a key component of the basal ganglia circuit, not memory function. - Damage to this site is typically associated with movement disorders like **hemiballismus**, not amnesia. *Medial forebrain bundle* - The **medial forebrain bundle (MFB)** is a collection of nerve fibers connecting the brainstem, hypothalamus, and limbic areas, playing a role in **reward and motivation**. - While it contributes to overall brain function, it is not the primary site responsible for the amnestic defect in Wernicke-Korsakoff syndrome.

Question 378: The following is a feature of Korsakoff's psychosis:-

A. Hallucination
B. Confabulation (Correct Answer)
C. Encephalopathy
D. Ophthalmoplegia

Explanation: ***Confabulation*** - **Confabulation**, or the fabrication of vivid but false memories, is a classic symptom of Korsakoff's psychosis, often used to fill gaps in memory. - This symptom arises from significant **anterograde and retrograde amnesia**, particularly for recent events. *Hallucination* - While hallucinations can occur in various neurological and psychiatric conditions, they are **not a primary or defining feature** of Korsakoff's psychosis. - Korsakoff's primarily involves memory impairment, not perceptual disturbances. *Encephalopathy* - **Encephalopathy** (Wernicke's encephalopathy) is the acute precursor to Korsakoff's psychosis, but not a feature of Korsakoff's itself. - Wernicke's encephalopathy is characterized by **acute confusion, ataxia, and ophthalmoplegia**, often resolving or progressing to Korsakoff's if untreated. *Ophthalmoplegia* - **Ophthalmoplegia** (paralysis or weakness of eye muscles) is a key symptom of **Wernicke's encephalopathy**, the acute phase of thiamine deficiency. - While Wernicke's can progress to Korsakoff's, ophthalmoplegia is generally **not a persistent feature** of chronic Korsakoff's psychosis.

Question 379: The most widely used substance causing dependence worldwide is:

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

Explanation: ***Alcohol*** - **Alcohol** is the most widely consumed psychoactive substance globally, leading to a significant burden of dependence and related health issues. - Its widespread availability, social acceptance, and addictive properties contribute to its high rates of dependence across diverse populations. *Cocaine* - While **cocaine** is a powerful and highly addictive stimulant, its use and dependence are not as prevalent globally as alcohol. - The geographical distribution and historical context of cocaine use are more concentrated compared to the ubiquitous nature of alcohol consumption. *Cannabis* - **Cannabis** is one of the most commonly used illicit drugs worldwide, and it can cause dependence, but its overall prevalence of dependence is lower than that of alcohol. - The perception of lower harm and increased legalization in some regions have led to higher rates of use, but alcohol still surpasses it in terms of global dependence rates. *Amphetamines* - **Amphetamines**, including methamphetamine, are potent stimulants known for their high potential for dependence. - However, their global usage and rates of dependence, while significant in certain regions, do not reach the broad societal impact and prevalence seen with alcohol.

Question 380: Delirium tremens is most commonly seen in:

A. Opioid withdrawal
B. Alcohol withdrawal (Correct Answer)
C. Opioid intoxication
D. Alcohol intoxication

Explanation: ***Alcohol withdrawal*** - **Delirium tremens (DTs)** is the most severe form of **alcohol withdrawal syndrome**, characterized by **severe disorientation**, **agitation**, and **autonomic instability**. - It typically manifests 2-5 days after the cessation or significant reduction of alcohol intake in individuals with chronic alcohol dependence. *Opioid withdrawal* - Opioid withdrawal symptoms include **dysphoria**, **nausea**, **vomiting**, **diarrhea**, **muscle aches**, **lacrimation**, and **rhinorrhea**. - It does not typically involve the profound **delirium**, **hallucinations**, and **autonomic hyperactivity** seen in DTs. *Opioid intoxication* - Opioid intoxication presents with **central nervous system depression**, including **respiratory depression**, **miosis**, and **decreased level of consciousness**. - These symptoms are opposite to the hyperactive and agitated state characteristic of delirium tremens. *Alcohol intoxication* - Alcohol intoxication causes **central nervous system depression**, leading to **sedation**, **impaired coordination**, and **decreased judgment**. - This is a state of acute impairment from alcohol, not a withdrawal syndrome, and thus presents very differently from delirium tremens.

Practice by Chapter

Neurobiology of Addiction

Practice Questions

Alcohol Use Disorder

Practice Questions

Opioid Use Disorder

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Cannabis Use Disorder

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Stimulant Use Disorders

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Sedative, Hypnotic, and Anxiolytic Use Disorders

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Tobacco Use Disorder

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Hallucinogen-Related Disorders

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Substance Withdrawal Syndromes

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Pharmacotherapy for Substance Use Disorders

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Psychosocial Interventions

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Dual Diagnosis Management

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