Substance Use Disorders — MCQs

Substance Use Disorders Indian Medical PG Practice Questions and MCQs

Question 361: An alcoholic patient is admitted to the hospital 48 hours after his last drink. He presents with altered consciousness, disorientation, and severe agitation. What is the most likely diagnosis?

A. Delirium tremens (Correct Answer)
B. Korsakoff psychosis
C. Alcohol withdrawal symptoms
D. Cocaine intoxication

Explanation: ***Correct: Delirium tremens*** - **Classic presentation** with altered consciousness, disorientation, and severe agitation occurring **48 hours after last drink** (typical onset 48-72 hours) - Represents the **most severe form of alcohol withdrawal syndrome** - Clinical features include autonomic hyperactivity, confusion, visual/tactile hallucinations, and psychomotor agitation - **Medical emergency** requiring immediate treatment with benzodiazepines and supportive care - Mortality rate 5-15% if untreated *Incorrect: Korsakoff psychosis* - **Chronic condition** resulting from thiamine (vitamin B1) deficiency in chronic alcoholism - Characterized by **anterograde amnesia** and **confabulation**, not acute delirium - Does not present with acute altered consciousness or severe agitation - Timeline does not fit acute withdrawal scenario *Incorrect: Alcohol withdrawal symptoms* - While DT is technically a form of alcohol withdrawal, this option refers to **minor/uncomplicated withdrawal** - Minor withdrawal symptoms (tremors, anxiety, sweating, nausea) typically occur **6-24 hours** after last drink, not at 48 hours - The **severity** (altered consciousness, disorientation) indicates progression to DT, not simple withdrawal - Uncomplicated withdrawal does not present with delirium or significant confusion *Incorrect: Cocaine intoxication* - Patient is described as **alcoholic with 48 hours since last drink** - no history of cocaine use mentioned - Cocaine intoxication would present with **euphoria, hyperactivity, paranoia**, and cardiovascular symptoms (tachycardia, hypertension) - Timeline doesn't fit - intoxication occurs during use, not days after last alcohol consumption

Question 362: A 55-year-old man presents to the hospital with auditory hallucinations and inability to recognize his own family members. He reports his last alcohol intake was 48 hours ago. What is the most likely diagnosis?

A. Schizophrenia
B. Delirium tremens (Correct Answer)
C. Alcoholic hallucinosis
D. Alcohol-induced psychosis

Explanation: ***Delirium tremens***- This severe form of alcohol withdrawal typically manifests 48 to 96 hours after the last drink, aligning perfectly with the patient's 48-hour abstinence period.- The presence of **auditory hallucinations** combined with **inability to recognize family members** (indicating **delirium** or **global disorientation**) confirms the diagnosis of Delirium Tremens (DT), which also includes autonomic hyperactivity.*Alcoholic hallucinosis*- This condition is characterized primarily by **auditory hallucinations** but generally occurs earlier, typically 12 to 24 hours after cessation.- Crucially, alcoholic hallucinosis occurs with a **clear sensorium** (clear consciousness), meaning there is no significant **delirium** or global confusion, unlike the presentation described.*Alcohol-induced psychosis*- While this broad category encompasses alcohol-related psychotic symptoms, **Delirium Tremens** is the specific and most appropriate diagnosis for the severe, time-locked withdrawal syndrome involving **delirium**, hallucinations, and autonomic instability 48 hours post-cessation.- This term is less specific and fails to capture the emergent nature and associated **autonomic hyperactivity** seen in DT.*Schizophrenia*- Schizophrenia is a **primary psychotic disorder** with a typical onset in early adulthood and a chronic course; the acute onset of psychosis temporally linked to **alcohol cessation** suggests an organic etiology.- The presence of **global confusion/disorientation** (inability to recognize family) is highly indicative of **delirium** and rules out schizophrenia, which does not involve a clouding of consciousness.

Question 363: Which of the following is NOT a symptom associated with chronic cocaine abuse?

A. Dilated pupils, rapid pulse and sweating. (Correct Answer)
B. Black tongue and teeth.
C. Hallucination of insects crawling on the skin (formication).
D. Nasal/palatal perforation.

Explanation: ***Dilated pupils, rapid pulse and sweating.***- These manifestations (mydriasis, tachycardia, and diaphoresis) are classic signs of **acute cocaine intoxication** resulting from massive sympathetic nervous system overstimulation.- While they occur every time the drug is used, they reflect the transient state of acute drug action rather than structural, neurological, or hygienic **long-term complications** of chronic abuse.*Nasal/palatal perforation.*- Chronic intranasal cocaine abuse leads to severe **vasoconstriction** and subsequent **ischemic necrosis** of the cartilaginous and bony structures in the septum and palate.- This structural destruction is a definitive **long-term consequence** that may lead to chronic sinusitis, dysphonia, and septal perforation.*Black tongue and teeth.*- This presentation is a characteristic finding in individuals who chronically smoke **crack cocaine**, often referred to as "crack mouth."- It is caused by a combination of extreme heat exposure, chemical irritation from the smoke, and severe neglect of **oral hygiene** associated with addiction.*Hallucination of insects crawling on the skin (formication).*- This severe **tactile hallucination**, often colloquially termed "cocaine bugs," is a known psychiatric consequence of **chronic, high-dose stimulant abuse**.- It results from neurotoxicity and is a marker of severe dopaminergic system dysregulation due to long-term substance use.

Question 364: What is the most common symptom of cannabis intake?

A. Anxiety
B. Depressed mood
C. Dream-like state (Correct Answer)
D. Decreased appetite

Explanation: ***Dream-like state***- The most common and defining acute symptom of cannabis intoxication is the **psychoactive effect**, leading to altered sense of time, altered sensory perception, and a relaxed, sometimes euphoric, **dream-like state**.- This perceptual alteration is due to the agonist activity of **delta-9-tetrahydrocannabinol (THC)** primarily on central **CB1 receptors**. *Anxiety*- While **anxiety**, **paranoia**, and panic attacks are frequently reported adverse effects, particularly with high potency strains or accidental overdose, they are not the primary anticipated or most common effect.- The typical desired effect is generally **relaxation** and **euphoria**, which contrasts with the experience of acute anxiety.*Depressed mood*- Acute cannabis intoxication usually leads to a transient sense of **well-being** or **euphoria**, rather than an acutely depressed mood.- A primary depressive state or **amotivational syndrome** is more typically associated with chronic, heavy use or withdrawal states, not the initial acute intoxication.*Decreased appetite*- Cannabis is famously known for significantly **increasing appetite**, often termed **"the munchies,"** due to the stimulation of cannabinoid receptors in appetite centers.- The active component, THC, acts as an **orexigenic agent**, making decreased appetite an incorrect association.

Question 365: All of the following statements are correct except:

A. Opioid withdrawal is rarely fatal
B. Buprenorphine can be used for the management of opioid withdrawal
C. Flumazenil is used for the management of long-term alcohol dependence syndrome (Correct Answer)
D. Cannabis withdrawal is associated with minimal physical symptoms

Explanation: ***Flumazenil is used for the management of long-term alcohol dependence syndrome*** - This statement is incorrect because **Flumazenil** is a **GABA-A receptor antagonist** specifically used to reverse the effects of **benzodiazepine overdose** (acute intoxication or sedation), not for the management of chronic alcohol dependence syndrome. - Management of long-term alcohol dependence typically involves medications like **naltrexone, acamprosate, or disulfiram**, along with psychosocial therapies. ***Opioid withdrawal is rarely fatal*** - This statement is correct. While opioid withdrawal is highly distressing and uncomfortable (**flu-like symptoms, diarrhea, vomiting**), it is **not life-threatening** except in very rare cases due to severe dehydration or aspiration. - The primary concern in opioid dependence is the risk of **fatal overdose** upon relapse, especially after a period of abstinence. ***Buprenorphine can be used for the management of opioid withdrawal*** - This statement is correct. **Buprenorphine**, a **partial opioid agonist**, is a standard treatment for both acute opioid withdrawal and long-term maintenance treatment (Opioid Substitution Therapy). - It helps alleviate withdrawal symptoms and cravings while posing a lower risk of respiratory depression compared to full agonists like methadone. ***Cannabis withdrawal is associated with minimal physical symptoms*** - This statement is correct. Cannabis withdrawal primarily manifests as **psychological symptoms** such as irritability, anxiety, insomnia, and depressed mood. - Physical symptoms are generally mild, limited to temporary decreases in appetite, stomach pain, or tremors, and are **not medically significant** compared to alcohol or opioid withdrawal.

Question 366: Which of the following are trigger factors for seizures? I. Sleep deprivation II. Missed doses of antiepileptic drugs III. Recreational drug misuse IV. Physical exhaustion Select the correct answer using the code given below:

A. II and III only
B. I and IV only
C. I, II, III and IV (Correct Answer)
D. I, II and III only

Explanation: ***I, II, III and IV*** - **Sleep deprivation** significantly lowers the **seizure threshold** by altering brain excitability and neurochemical balance. - **Missed doses of antiepileptic drugs** lead to subtherapeutic drug levels, increasing the likelihood of breakthrough seizures in individuals undergoing treatment. - **Recreational drug misuse** (e.g., cocaine, amphetamines, alcohol withdrawal) can directly cause seizures by neurotoxic effects or by unmasking an underlying seizure disorder. - **Physical exhaustion** can act as a stressor, disrupting brain homeostasis and making individuals more susceptible to seizures, similar to sleep deprivation. *II and III only* - This option is incomplete as **sleep deprivation** and **physical exhaustion** are also well-established seizure triggers. *I and IV only* - This option is incomplete because **missed doses of antiepileptic drugs** and **recreational drug misuse** are critical and common triggers for seizures. *I, II and III only* - This option overlooks **physical exhaustion**, which can, similar to sleep deprivation, significantly reduce the seizure threshold.

Question 367: Which one of the following substances induces no dependence?

A. LSD (Correct Answer)
B. Barbiturates
C. Heroin
D. Cannabis

Explanation: ***LSD*** - **LSD (lysergic acid diethylamide)** is a hallucinogen with the **lowest dependence potential** among the given options. - It does **not cause physical dependence** - there is no withdrawal syndrome when use is stopped. - **Psychological dependence** is extremely rare, as rapid tolerance develops (within days) and dissipates quickly, making continuous use unrewarding. - Users do **not experience compulsive drug-seeking behavior** or physical withdrawal symptoms characteristic of addictive substances. - In the context of this question, LSD is considered to have **negligible dependence potential** compared to other substances. *Barbiturates* - **Barbiturates** are CNS depressants with **high potential** for both physical and psychological dependence. - Chronic use leads to tolerance requiring higher doses, and **withdrawal can be life-threatening** (seizures, delirium tremens, cardiovascular collapse). - Classified as Schedule II-IV controlled substances due to high abuse potential. *Heroin* - **Heroin** (diacetylmorphine) is an opioid with **extremely high potential** for both physical and psychological dependence. - Rapid onset and intense euphoria create powerful reinforcement of drug-seeking behavior. - **Withdrawal syndrome** includes severe dysphoria, muscle aches, sweating, nausea, and intense cravings, driving continued use. *Cannabis* - **Cannabis** has **moderate dependence potential**, particularly with chronic high-potency use. - **Cannabis Use Disorder** is recognized in DSM-5, with about 9% of users developing dependence (30% for daily users). - **Withdrawal syndrome** includes irritability, anxiety, sleep disturbances, decreased appetite, restlessness, and cravings. - Physical dependence is less severe than opioids or sedatives but is clinically significant.

Question 368: A patient stopped alcohol consumption for 3 days and presented with irritability, disorientation, paranoid delusions, agitation, visual hallucinations, and altered sensorium. What is the likely diagnosis in this case?

A. Wernicke's encephalopathy
B. Alcohol withdrawal delirium (Correct Answer)
C. Korsakoff's psychosis
D. Alcohol intoxication

Explanation: ***Alcohol withdrawal delirium*** - The combination of **irritability, disorientation, paranoid delusions, agitation, visual hallucinations, and altered sensorium** developing 3 days after cessation of alcohol is classic for **delirium tremens**, the most severe form of alcohol withdrawal. - This condition is a medical emergency that can lead to seizures, cardiovascular collapse, and death if not treated promptly. *Wernicke's encephalopathy* - Characterized by the triad of **ataxia, ophthalmoplegia, and confusion**, which is due to **thiamine deficiency** and is not fully consistent with the patient's presentation. - While it can occur in chronic alcoholics, the rapid onset of severe agitation, hallucinations, and paranoia points more towards active withdrawal. *Korsakoff's psychosis* - This is a chronic neuropsychiatric syndrome that typically follows untreated Wernicke's encephalopathy, characterized by severe **anterograde and retrograde amnesia** and **confabulation**. - It does not present with the acute delirium, agitation, and prominent hallucinations described. *Alcohol intoxication* - This occurs when a person has recently consumed a large amount of alcohol, leading to symptoms like **slurred speech, impaired coordination, mood changes, and reduced inhibition**. - The patient's symptoms are occurring *after* stopping alcohol consumption for 3 days, indicating withdrawal, not active intoxication.

Question 369: After 72 hours of Cessation of alcohol, which of the following withdrawal symptoms can be seen in alcoholic patients?

A. Seizures
B. Hallucinations
C. Tremors
D. Delirium tremens (Correct Answer)

Explanation: **Delirium tremens** - **Delirium tremens** typically manifests **48-96 hours** (2-4 days) after the last drink, making it a key symptom seen around the 72-hour mark. - It involves **severe confusion**, disorientation, **hallucinations** (visual, auditory, tactile), agitation, and autonomic instability like **tachycardia**, hyperthermia, and hypertension, representing the most severe form of alcohol withdrawal. *Seizures* - **Alcohol withdrawal seizures** usually occur much earlier, within **6 to 48 hours** after cessation. - While possible within the broader withdrawal timeline, they are more characteristic of the initial stages rather than the 72-hour peak of delirium tremens. *Hallucinations* - **Alcoholic hallucinosis** typically develops **12-24 hours** after cessation and can persist for days. - While hallucinations are a component of delirium tremens, isolated hallucinosis usually presents earlier without the global cognitive impairment and autonomic instability of DTs. *Tremors* - **Tremors** are among the first signs of alcohol withdrawal, appearing as early as **6-12 hours** after the last drink. - These early symptoms are usually self-limiting or managed with benzodiazepines and precede the more severe stages seen at 72 hours.

Question 370: Which of the following is a true statement about Korsakoff syndrome?

A. Loss of implicit memory and immediate recall
B. Triad of confusion, ophthalmoplegia, and ataxia
C. Anterograde amnesia with loss of recent memory (Correct Answer)
D. Loss of long-term memory but intact personality

Explanation: ***Anterograde amnesia with loss of recent memory*** - **Korsakoff syndrome** is primarily characterized by severe **anterograde amnesia**, making it difficult for patients to form new memories after the onset of the condition. - Patients often present with **significant loss of recent memory**, while older, remote memories may remain relatively preserved. *Loss of implicit memory and immediate recall* - While certain aspects of memory are impaired, immediate recall (e.g., repeating a short list of words immediately after hearing them) is often **relatively spared** in Korsakoff syndrome. - **Implicit memory**, which involves unconscious learning of skills and habits, is also typically **intact**, allowing patients to learn new motor skills despite their declarative memory deficits. *Triad of confusion, ophthalmoplegia, and ataxia* - This triad describes **Wernicke encephalopathy**, which is an acute neurological emergency caused by thiamine deficiency, often preceding Korsakoff syndrome. - Korsakoff syndrome, on the other hand, is a more **chronic neuropsychiatric condition** that often develops in individuals who have recovered from an episode of Wernicke encephalopathy. *Loss of long-term memory but intact personality* - While it primarily impacts the formation of new long-term memories, established **remote long-term memories** from before the illness are often **relatively preserved**. - While personality changes can occur due to the brain damage, the statement "intact personality" is **not a defining hallmark** used to differentiate Korsakoff syndrome from other memory disorders.

Practice by Chapter

Neurobiology of Addiction

Practice Questions

Alcohol Use Disorder

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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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