Substance Use Disorders Practice Questions

Q: Treatment is not required in the withdrawal of which of the following substances?

LSD. **Explanation:** The correct answer is **LSD (Lysergic acid diethylamide)**. The fundamental medical concept here is the distinction between substances that produce physical dependence versus those that do not. **LSD** is a potent hallucinogen that acts primarily on 5-HT2A receptors. While it produces significant psychological effects and rapid tolerance, it **does not cause physical dependence**. Consequently, there is no clinically recognized withdrawal syndrome associated with the cessation of LSD use. Therefore, no pharmacological treatment for withdrawal is required. **Analysis of Incorrect Options:** * **Cannabis:** Chronic use leads to a withdrawal syndrome characterized by irritability, insomnia, decreased appetite, and anxiety. While often mild, severe cases may require supportive care or symptomatic treatment (e.g., benzodiazepines for anxiety). * **Alcohol:** Alcohol withdrawal is a medical emergency. It can lead to life-threatening conditions like **Delirium Tremens** and seizures. Treatment with Benzodiazepines (Chlordiazepoxide or Diazepam) is mandatory to prevent mortality. * **Amphetamine:** Withdrawal (the "crash") involves profound depression, fatigue, and vivid unpleasant dreams. While not usually life-threatening, it often requires supportive care and monitoring for suicidal ideation. **Clinical Pearls for NEET-PG:** * **Hallucinogens (LSD, Psilocybin):** No withdrawal syndrome, but can cause **HPPD** (Hallucinogen Persisting Perception Disorder) or "flashbacks." * **Cocaine/Amphetamines:** Withdrawal is primarily psychological (dysphoria, cravings) rather than physical. * **Opioids/Alcohol/Benzodiazepines:** These have the most severe physical withdrawal symptoms. * **Phencyclidine (PCP):** Unlike LSD, PCP intoxication often requires aggressive management due to violent behavior and nystagmus (vertical/rotatory).

Q: All of the following are used in nicotine de-addiction, except?

Buspirone. **Explanation:** The management of nicotine dependence involves both pharmacological and behavioral interventions. The correct answer is **Buspirone**, as it has no proven efficacy in smoking cessation. **1. Why Buspirone is the Correct Answer:** Buspirone is an **anxiolytic** (5-HT1A partial agonist) used primarily for Generalized Anxiety Disorder (GAD). While anxiety is a common withdrawal symptom of nicotine, clinical trials have shown that Buspirone does not improve long-term quit rates or reduce cravings compared to a placebo. **2. Why the other options are used:** * **Bupropion (Option A):** An atypical antidepressant (NDRI) that inhibits the reuptake of norepinephrine and dopamine. It mimics some of the effects of nicotine on the brain's reward system, reducing withdrawal symptoms and the urge to smoke. It is a **first-line** non-nicotine therapy. * **Clonidine (Option B):** An alpha-2 adrenergic agonist. It is considered a **second-line** agent. It helps suppress the sympathetic overactivity (agitation, irritability) associated with nicotine withdrawal. * **Nicotine Gum (Option C):** A form of **Nicotine Replacement Therapy (NRT)**. It provides a controlled dose of nicotine to the blood to alleviate withdrawal symptoms while the patient breaks the behavioral habit of smoking. **Clinical Pearls for NEET-PG:** * **First-line agents:** NRT (Gums, patches, lozenges), Bupropion, and **Varenicline** (a nicotinic ACh receptor partial agonist; most effective single agent). * **Second-line agents:** Clonidine and Nortriptyline. * **Contraindication:** Bupropion is strictly contraindicated in patients with a **seizure disorder** or eating disorders (bulimia/anorexia) as it lowers the seizure threshold. * **Varenicline side effect:** Most common is nausea; also monitor for neuropsychiatric symptoms (suicidal ideation).

Q: Disulfiram and acamprosate are used for which of the following conditions?

Alcohol abstinence. **Explanation:** The correct answer is **Alcohol abstinence**. Both Disulfiram and Acamprosate are FDA-approved pharmacological interventions used to maintain sobriety in patients with Alcohol Use Disorder (AUD). * **Disulfiram (Aversion Therapy):** It acts by inhibiting the enzyme **aldehyde dehydrogenase**. This leads to the accumulation of acetaldehyde if alcohol is consumed, causing the "Disulfiram-ethanol reaction" (flushing, tachycardia, nausea, and palpitations). This creates a psychological deterrent against drinking. * **Acamprosate (Anti-craving):** It is a GABA agonist and NMDA antagonist. It helps restore the neurochemical balance (homeostasis) in the brain that is disrupted by chronic alcohol use, thereby reducing withdrawal symptoms and cravings. **Analysis of Incorrect Options:** * **B. Cocaine abuse:** Treatment is primarily symptomatic (e.g., benzodiazepines for agitation). There is no FDA-approved maintenance medication, though Disulfiram is sometimes studied off-label. * **C. Opium poisoning:** The acute management requires **Naloxone** (opioid antagonist). Maintenance for dependence involves Methadone or Buprenorphine. * **D. Atropine overdose:** The specific antidote is **Physostigmine**, a reversible acetylcholinesterase inhibitor. **High-Yield Clinical Pearls for NEET-PG:** * **Naltrexone:** Another first-line drug for alcohol dependence; it reduces the "reward" or euphoria of drinking by blocking mu-opioid receptors. * **Acamprosate** is the drug of choice in patients with **liver disease**, as it is renally excreted. * **Naltrexone** is contraindicated in patients with acute hepatitis or liver failure. * **Wernicke’s Encephalopathy:** Always remember to give Thiamine *before* Glucose in alcoholic patients to prevent precipitating this condition.

Q: Which is NOT a method of behavioral treatment used for alcoholism?

Home detoxification. **Explanation:** The question asks to identify which option is **NOT** a behavioral treatment method. Behavioral treatments are psychological interventions based on learning theories (Classical and Operant Conditioning) aimed at modifying drinking behavior. **Why "Home Detoxification" is the correct answer:** Home detoxification is a **medical/pharmacological intervention**, not a behavioral therapy. It involves the supervised withdrawal from alcohol in a residential setting, primarily using medications like Benzodiazepines (e.g., Chlordiazepoxide) to prevent seizures and delirium tremens. It addresses the physiological dependence rather than the psychological behavior. **Analysis of Incorrect Options:** * **Aversion Therapy:** A classic behavioral technique based on **Classical Conditioning**. It involves pairing the sight/smell/taste of alcohol with an unpleasant stimulus (like Emetine to induce vomiting or electric shocks) to create a conditioned distaste for alcohol. * **Cue Exposure:** Based on **Extinction theory**. Patients are exposed to triggers (cues) like the smell of beer or a bar environment without being allowed to drink. This helps reduce the conditioned craving over time. * **Alcoholics Anonymous (AA):** While primarily a self-help/mutual-aid group, it utilizes **Social Learning** and behavioral modification through its 12-step program, peer reinforcement, and lifestyle restructuring. **High-Yield Clinical Pearls for NEET-PG:** * **Disulfiram (Antabuse):** Works via **Aversion** by inhibiting *Aldehyde Dehydrogenase*, leading to toxic accumulation of Acetaldehyde (Disulfiram-like reaction). * **Gold Standard for Alcohol Withdrawal:** Benzodiazepines (Diazepam/Chlordiazepoxide). * **Wernicke’s Encephalopathy:** Always give Thiamine *before* Glucose to prevent precipitating this condition. * **Naltrexone:** An Opioid antagonist used to reduce cravings and the "reward" of drinking.

Q: Magnan's symptom', 'crack lung', and 'crack dancing' are seen in chronic use of which of the following substances?

Cocaine. **Explanation:** The correct answer is **Cocaine**. These three terms represent specific clinical manifestations of chronic cocaine toxicity, particularly in its potent alkaloid form known as "crack." 1. **Magnan’s Symptom (Formication):** This is a tactile hallucination where the patient feels as if insects are crawling under their skin (also called "cocaine bugs"). It often leads to excessive scratching and skin excoriations. 2. **Crack Lung:** An acute pulmonary syndrome occurring after inhaling freebase cocaine. It is characterized by diffuse alveolar hemorrhage, eosinophilia, and infiltrates on chest X-ray, presenting with chest pain, dyspnea, and hemoptysis. 3. **Crack Dancing (Choreoathetosis):** A transient movement disorder characterized by choreiform (jerky, involuntary) movements of the limbs, caused by cocaine-induced dopamine dysregulation in the basal ganglia. **Why other options are incorrect:** * **Alcohol:** Chronic use leads to Wernicke-Korsakoff syndrome, DTs, or liver cirrhosis, but not these specific signs. * **Cannabis:** Associated with "Amotivational Syndrome," conjunctival injection, and increased appetite (munchies). * **Barbiturates:** These are CNS depressants; toxicity leads to respiratory depression, coma, and "bullous lesions" in severe overdose, not stimulant-related tactile hallucinations. **High-Yield Clinical Pearls for NEET-PG:** * **Mechanism:** Cocaine blocks the reuptake of Dopamine, Norepinephrine, and Serotonin. * **Pupils:** Cocaine causes **Mydriasis** (dilated pupils), whereas Opioids cause Miosis (pinpoint pupils). * **Cardiovascular:** Cocaine is a potent vasoconstrictor; it is a leading cause of drug-induced Myocardial Infarction in young adults. * **Treatment:** Benzodiazepines are the first-line treatment for cocaine toxicity. **Beta-blockers are contraindicated** due to the risk of unopposed alpha-adrenergic stimulation.

Q: Alcohol withdrawal presents with all of the following EXCEPT:

Bradycardia. ### Explanation Alcohol is a Central Nervous System (CNS) depressant that enhances GABAergic (inhibitory) tone and inhibits NMDA (excitatory) glutamate receptors. Chronic consumption leads to a compensatory down-regulation of GABA receptors and up-regulation of NMDA receptors to maintain homeostasis. When alcohol is abruptly stopped, this balance shifts toward **CNS hyperexcitability** and **autonomic hyperactivity**. **Why Bradycardia is the Correct Answer:** Alcohol withdrawal is characterized by a "hyper-adrenergic" state. This leads to **Tachycardia** (increased heart rate) and hypertension, rather than Bradycardia (slow heart rate). Bradycardia is typically seen in opioid overdose or sedative-hypnotic intoxication, not alcohol withdrawal. **Analysis of Other Options:** * **Tremors (Option B):** The most common and earliest sign of withdrawal ("the shakes"), usually appearing within 6–12 hours of the last drink. * **Sweating (Option D):** Diaphoresis is a hallmark of autonomic instability caused by sympathetic overactivity. * **Hallucinations (Option A):** Alcoholic hallucinosis (usually visual or tactile) can occur 12–24 hours after cessation. Unlike Delirium Tremens, these occur in a state of clear sensorium. **High-Yield Clinical Pearls for NEET-PG:** * **Delirium Tremens (DT):** The most severe form of withdrawal (48–96 hours). Features include clouded consciousness, vivid hallucinations, and severe autonomic instability. * **Withdrawal Seizures:** Typically "Rum Fits" (Generalized Tonic-Clonic) occurring 6–48 hours after the last drink. * **Drug of Choice:** **Benzodiazepines** (e.g., Diazepam, Lorazepam) are the gold standard for managing withdrawal symptoms and preventing seizures/DT. * **Wernicke’s Encephalopathy:** Always give **Thiamine** before Glucose to prevent precipitating this condition.

Q: Morbid jealousy is seen in which of the following conditions?

Alcoholism. **Explanation:** **Morbid Jealousy** (also known as **Othello Syndrome**) is a psychotic disorder characterized by the delusional belief that one's partner is being unfaithful. It is most strongly associated with **Chronic Alcoholism**. 1. **Why Alcoholism is Correct:** Chronic alcohol use can lead to sexual dysfunction (impotence), which creates feelings of inadequacy and insecurity. To cope with these feelings, the individual projects their inadequacy onto their partner through accusations of infidelity. It is considered a form of **Delusional Disorder (Jealous type)**. In the context of alcoholism, it is often referred to as "Alcoholic Hallucinosis" or a specific paranoid state arising from long-term abuse. 2. **Why Incorrect Options are Wrong:** * **Social Isolation:** While isolation can exacerbate paranoid personality traits, it is not a primary clinical cause of morbid jealousy. * **Social Phobia:** This is an anxiety disorder characterized by a fear of scrutiny in social situations; it does not typically involve delusional jealousy. * **Depression:** While depression can cause "depressive pseudodementia" or "delusions of guilt/worthlessness," morbid jealousy is not a hallmark feature. **Clinical Pearls for NEET-PG:** * **Othello Syndrome:** Named after Shakespeare’s character; it carries a high risk of **domestic violence and homicide**. * **De Clerambault’s Syndrome:** Delusion that a person of higher status is in love with the patient (Erotomania). * **Capgras Syndrome:** Delusion that a familiar person has been replaced by an identical impostor. * **Fregoli Syndrome:** Delusion that different people are actually a single person in disguise.

Q: Alcoholic paranoia is associated with which of the following?

Fixed delusions. **Explanation:** **Alcoholic Paranoia** (also known as Alcohol-induced Psychotic Disorder) is a specific psychiatric condition occurring in the context of chronic alcohol use. **Why Option A is Correct:** The hallmark of alcoholic paranoia is the presence of **fixed delusions**, most commonly **delusions of infidelity** (also known as **Othello Syndrome** or Conjugal Paranoia). The patient maintains a firm, false belief that their spouse or partner is being unfaithful. Unlike Delirium Tremens, these delusions occur in a state of **clear consciousness** (no clouding of sensorium). **Why Other Options are Incorrect:** * **B. Hallucinations:** While auditory hallucinations are the primary feature of *Alcoholic Hallucinosis*, they are not the defining feature of alcoholic paranoia, which is characterized by delusional thought content rather than perceptual disturbances. * **C. Drowsiness:** This is a sign of acute alcohol intoxication or hepatic encephalopathy. In alcoholic paranoia, the patient is typically alert and oriented. * **D. Impulse Agitation:** While patients may become aggressive due to their delusions, "impulse agitation" is more characteristic of acute intoxication or withdrawal states (like Delirium Tremens) rather than the structured delusional framework of paranoia. **High-Yield Clinical Pearls for NEET-PG:** * **Othello Syndrome:** Specifically refers to the morbid jealousy/delusion of infidelity seen in chronic alcoholics. * **Differential Diagnosis:** Always distinguish from **Alcoholic Hallucinosis** (vivid auditory hallucinations + clear sensorium) and **Delirium Tremens** (visual hallucinations + clouded sensorium + autonomic hyperactivity). * **Treatment:** The primary approach involves alcohol abstinence and the use of antipsychotics (e.g., Haloperidol) to manage the delusions.

Q: Delirium is most commonly seen in which of the following substance withdrawal states?

Alcohol. **Explanation:** **1. Why Alcohol is Correct:** The most severe manifestation of alcohol withdrawal is **Delirium Tremens (DT)**. It typically occurs 48–96 hours after the last drink. The underlying mechanism involves the sudden cessation of chronic ethanol consumption, which leads to a state of **NMDA receptor upregulation** and **GABA receptor downregulation**. This results in profound glutamate-mediated CNS hyperexcitability, manifesting as autonomic instability, global confusion, disorientation, and vivid hallucinations. **2. Why Other Options are Incorrect:** * **Barbiturates:** While barbiturate withdrawal is medically dangerous and can cause seizures or a delirium-like state, it is statistically **less common** than alcohol-induced delirium in clinical practice. * **Opioids:** Withdrawal (e.g., from Heroin or Morphine) is notoriously painful and distressing, characterized by "flu-like" symptoms (rhinorrhea, lacrimation, diarrhea, yawning). However, it **does not cause delirium** or clouding of consciousness and is rarely life-threatening. * **Cocaine:** Withdrawal primarily causes a "crash" characterized by dysphoria, hypersomnia, and intense craving. It does not result in delirium. **3. High-Yield Clinical Pearls for NEET-PG:** * **Delirium Tremens (DT):** Mortality is approximately 5% (usually due to arrhythmia or respiratory failure). The drug of choice for management is **Benzodiazepines** (e.g., Diazepam or Lorazepam). * **Order of Alcohol Withdrawal:** Tremors (6–12h) → Seizures (12–48h; "Rum Fits") → Hallucinosis (12–24h; clear sensorium) → Delirium Tremens (48–96h; clouded sensorium). * **Wernicke’s Encephalopathy:** Often confused with DT; remember the triad: **Ophthalmoplegia, Ataxia, and Confusion.** It is due to Thiamine (B1) deficiency, not withdrawal itself.

Question 1

Treatment is not required in the withdrawal of which of the following substances?

Accepted Answer

LSD

Answer

Cannabis

Answer

Alcohol

Answer

Amphetamine

Question 2

All of the following are used in nicotine de-addiction, except?

Accepted Answer

Buspirone

Answer

Bupropion

Answer

Clonidine

Answer

Nicotine gum

Question 3

Disulfiram and acamprosate are used for which of the following conditions?

Accepted Answer

Alcohol abstinence

Answer

Cocaine abuse

Answer

Opium poisoning

Answer

Atropine overdose

Question 4

Which is NOT a method of behavioral treatment used for alcoholism?

Accepted Answer

Home detoxification

Answer

Aversion therapy

Answer

Cue exposure

Answer

Alcoholics Anonymous

Question 5

Magnan's symptom', 'crack lung', and 'crack dancing' are seen in chronic use of which of the following substances?

Accepted Answer

Cocaine

Answer

Alcohol

Answer

Cannabis

Answer

Barbiturates

Question 6

Alcohol withdrawal presents with all of the following EXCEPT:

Accepted Answer

Bradycardia

Answer

Hallucinations

Answer

Tremors

Answer

Sweating

Question 7

Morbid jealousy is seen in which of the following conditions?

Accepted Answer

Alcoholism

Answer

Persons who are socially isolated

Answer

Social phobia

Answer

Depression

Question 8

Alcoholic paranoia is associated with which of the following?

Accepted Answer

Fixed delusions

Answer

Hallucinations

Answer

Drowsiness

Answer

Impulse agitation

Question 9

Delirium is most commonly seen in which of the following substance withdrawal states?

Accepted Answer

Alcohol

Answer

Barbiturates

Answer

Opioids

Answer

Cocaine

Question 10

Which of the following is the best indicator of alcohol dependence?

Accepted Answer

Withdrawal symptoms

Answer

Blackouts

Answer

Early morning drinking

Answer

Physical dependence

Substance Use Disorders — MCQs

Substance Use Disorders — MCQs

On this page

Practice by Chapter

Want unlimited practice?