Substance Use Disorders Practice Questions

Q: What is the most commonly abused substance?

Marijuana. **Explanation:** The correct answer is **Marijuana (Cannabis)**. According to global epidemiological data (WHO) and the National Survey on Extent and Pattern of Substance Use in India, **Cannabis** is the most commonly used illicit drug worldwide and in India. While alcohol and tobacco are the most commonly abused *legal* substances, among the illicit substances listed, Marijuana holds the highest prevalence due to its high availability, perceived low risk, and cultural factors. **Analysis of Options:** * **A. Datura:** This is a potent deliriant and anticholinergic. While it grows wild and is used in forensic/toxicological contexts or occasional ritualistic use, it is not a drug of "choice" for chronic abuse due to its highly unpleasant and dangerous side effects (the "Mad as a hatter" profile). * **C. Cocaine:** A powerful stimulant. While prevalent in specific urban demographics or Western countries, its high cost and lower availability make its overall prevalence much lower than Marijuana. * **D. Heroin:** An opioid with high addiction potential. Although opioid use is a significant public health concern in India (especially in the North-East and Punjab), the absolute number of users is lower than those using Cannabis. **High-Yield Clinical Pearls for NEET-PG:** * **Most common illicit substance:** Marijuana. * **Most common substance of abuse (overall):** Alcohol (followed by Tobacco). * **Active Ingredient:** Delta-9-tetrahydrocannabinol (THC). * **Clinical Sign:** Conjunctival injection (red eyes) and increased appetite ("munchies") are classic signs of intoxication. * **Psychiatric Link:** Chronic use is strongly associated with **Amotivational Syndrome** and can precipitate schizophrenia in genetically vulnerable individuals.

Q: Morbid jealousy is associated with which substance?

Alcohol. **Explanation:** **Morbid Jealousy** (also known as **Othello Syndrome**) is a psychotic disorder characterized by the delusional belief that one's partner is being unfaithful. In the context of psychiatry, it is most strongly and classically associated with **Chronic Alcoholism**. 1. **Why Alcohol is Correct:** Chronic alcohol use can lead to **Alcohol-Induced Psychotic Disorder**. The mechanism involves alcohol-related erectile dysfunction and decreased libido, which leads to feelings of inadequacy and insecurity. The patient projects these insecurities onto their partner, manifesting as persistent, unfounded delusions of infidelity. It is a high-yield association often tested in the context of "delusional disorders." 2. **Why Incorrect Options are Wrong:** * **Heroin (Opioids):** Typically causes euphoria, sedation, and miosis. While withdrawal can cause agitation, it does not characteristically present with specific delusional themes like morbid jealousy. * **Cannabis:** Associated with "Amotivational Syndrome" and acute cannabis-induced psychosis (often paranoid or persecutory), but not specifically linked to Othello syndrome. * **LSD (Hallucinogens):** Primarily causes perceptual distortions (hallucinations, synesthesia) and "bad trips." It does not typically result in structured delusions of jealousy. **Clinical Pearls for NEET-PG:** * **Othello Syndrome** is a form of **Monodelusional Disorder**. * It is a significant risk factor for **domestic violence and homicide**; safety assessment of the partner is a priority. * **Other Alcohol-related Psychotic Symptoms:** * **Alcoholic Hallucinosis:** Auditory hallucinations occurring in a clear sensorium (unlike Delirium Tremens). * **Wernicke-Korsakoff Syndrome:** Due to Thiamine (B1) deficiency. * **Management:** The primary treatment involves abstinence from alcohol and the use of antipsychotics (e.g., Risperidone).

Q: Physical withdrawal symptoms are not marked in patients abusing which of the following substances?

Cannabis. ### Explanation The correct answer is **Cannabis**. **1. Why Cannabis is the correct answer:** Withdrawal symptoms are primarily driven by the rapid clearance of a substance from the body, leading to neurochemical rebound. **Cannabis (THC)** is highly lipophilic and is stored in the body's adipose tissue. It has a very long half-life (approx. 5–7 days). When a user stops consumption, THC is released slowly from the fat stores into the bloodstream, creating a "self-tapering" effect. Consequently, while psychological symptoms (irritability, insomnia, anxiety) occur, **marked physical withdrawal symptoms** (like those seen in opioids or alcohol) are typically absent or very mild. **2. Why the other options are incorrect:** * **Pethidine & Opium (Opioids):** Opioid withdrawal is characterized by intense physical symptoms due to autonomic hyperactivity. Symptoms include lacrimation, rhinorrhea, piloerection (cold turkey), dilated pupils, and severe muscle/abdominal cramps. * **Alcohol:** Alcohol withdrawal is medically significant and potentially life-threatening. It involves marked physical symptoms such as tremors, tachycardia, sweating, and in severe cases, seizures or delirium tremens. **3. High-Yield Clinical Pearls for NEET-PG:** * **Cannabis:** Most commonly used illicit drug worldwide. Long-term use is associated with **Amotivational Syndrome**. * **Flashbacks:** Spontaneous recurrence of the drug experience in the absence of the drug; most common with **LSD**, but can occur with Cannabis. * **Opioid Withdrawal:** Though extremely painful and distressing ("flu-like" symptoms), it is usually **not life-threatening**, unlike Alcohol or Benzodiazepine withdrawal. * **Cocaine:** Another substance where physical withdrawal is not marked; it primarily presents with a "crash" (dysphoria and exhaustion).

Q: Which of the following are pharmacologically approved treatments for tobacco addiction?

Nicotine and Bupropion. ### Explanation **Correct Answer: A. Nicotine and Bupropion** Tobacco cessation involves targeting the neurobiological pathways of nicotine addiction, specifically the dopaminergic reward system and nicotinic acetylcholine receptors (nAChRs). 1. **Nicotine Replacement Therapy (NRT):** This is a first-line treatment that provides nicotine in a controlled manner (gums, patches, lozenges) to reduce withdrawal symptoms and cravings without the harmful toxins found in tobacco smoke. 2. **Bupropion (Sustained Release):** Originally an atypical antidepressant, it acts as a norepinephrine-dopamine reuptake inhibitor (NDRI) and a weak nicotinic antagonist. It reduces the urge to smoke and minimizes weight gain associated with cessation. **Analysis of Incorrect Options:** * **Mecanylate (Mecamylamine):** While it is a non-selective nicotinic antagonist, it is primarily an antihypertensive agent. It is not FDA-approved as a standalone treatment for tobacco addiction due to its significant side-effect profile. * **Dopamine:** While nicotine increases dopamine levels in the nucleus accumbens, exogenous dopamine administration is not a treatment for addiction. It does not cross the blood-brain barrier effectively and has no role in smoking cessation. **High-Yield Clinical Pearls for NEET-PG:** * **Varenicline:** A **partial agonist** at the $\alpha4\beta2$ nicotinic acetylcholine receptor. It is currently considered the **most effective** monotherapy for smoking cessation. * **Bupropion Contraindications:** Avoid in patients with a history of **seizures** or **eating disorders** (bulimia/anorexia), as it lowers the seizure threshold. * **NRT Precaution:** Should be used with caution in the immediate post-myocardial infarction period. * **The 5 A’s Strategy:** Ask, Advise, Assess, Assist, and Arrange.

Q: Korsakoff's psychosis is seen in which of the following conditions?

Alcohol withdrawal. **Explanation:** **Korsakoff’s Psychosis** is a late-stage manifestation of **Wernicke-Korsakoff Syndrome (WKS)**, primarily caused by a severe deficiency of **Thiamine (Vitamin B1)**. 1. **Why Alcohol Withdrawal is the correct answer:** While Korsakoff’s is technically a result of chronic alcohol *dependence* rather than the acute withdrawal phase itself, it is classically associated with the spectrum of alcohol-related neurological disorders. Chronic alcohol consumption leads to thiamine deficiency through poor dietary intake, impaired gastrointestinal absorption, and reduced hepatic storage. In the context of NEET-PG, "Alcohol withdrawal" is the most relevant clinical setting among the choices where this nutritional deficiency and its neuropsychiatric consequences are encountered. 2. **Why other options are incorrect:** * **CRF & Cirrhosis:** While these involve systemic metabolic derangements, they do not inherently cause the specific thiamine-related neuronal destruction in the mammillary bodies seen in Korsakoff’s. * **Marasmus:** This is a form of severe protein-energy malnutrition. While it involves global nutrient deficiencies, it is not the classic clinical association for Korsakoff’s psychosis. **High-Yield Clinical Pearls for NEET-PG:** * **The Triad of Wernicke’s Encephalopathy:** Confusion, Ataxia, and Ophthalmoplegia (reversible). * **Korsakoff’s Pentad:** Amnesia (Retrograde & Anterograde), Disorientation, Hallucinations, and **Confabulation** (filling memory gaps with imaginary stories). * **Pathology:** Characterized by atrophy of the **mammillary bodies** and dorsomedial nucleus of the thalamus. * **Management:** Always administer **Thiamine before Glucose** to prevent precipitating Wernicke’s Encephalopathy in a malnourished patient.

Q: Which of the following is a symptom of opioid withdrawal?

Piloerection. Opioid withdrawal is a high-yield topic for NEET-PG, characterized by a state of **autonomic hyperactivity**. When chronic opioid use is ceased, the body experiences a "rebound" effect of the sympathetic nervous system. **Explanation of the Correct Answer:** **A. Piloerection:** This is a classic sign of opioid withdrawal. It occurs due to sympathetic overactivity affecting the arrector pili muscles. Historically, this gave rise to the term "cold turkey" because the skin resembles that of a plucked turkey. **Explanation of Incorrect Options:** * **B. Dry skin:** In withdrawal, patients experience **diaphoresis** (profuse sweating) rather than dry skin. * **C. Bradycardia:** Withdrawal causes **tachycardia** and hypertension. Bradycardia is typically seen in opioid intoxication. * **D. Pupillary constriction (Miosis):** This is a hallmark of opioid **intoxication**. In withdrawal, the pupils undergo **mydriasis** (dilation). **High-Yield Clinical Pearls for NEET-PG:** 1. **Symptoms Checklist:** Think of "flu-like" symptoms: Rhinorrhea, lacrimation, yawning, nausea, vomiting, diarrhea, and abdominal cramps. 2. **The "Gooseflesh" Sign:** Piloerection is one of the most specific objective signs of withdrawal. 3. **COWS Scale:** The Clinical Opiate Withdrawal Scale (COWS) is used to rate the severity of these symptoms. 4. **Management:** Clonidine (alpha-2 agonist) is used to treat autonomic symptoms, while Methadone or Buprenorphine are used for long-term detoxification. 5. **Life-threatening?** Unlike alcohol or benzodiazepine withdrawal, opioid withdrawal is extremely distressing but rarely life-threatening in adults.

Q: Which of the following is NOT a feature of nicotine withdrawal?

Tachycardia. **Explanation:** The correct answer is **C. Tachycardia**. Nicotine is a potent stimulant that acts on nicotinic acetylcholine receptors, leading to the release of catecholamines (epinephrine and norepinephrine). This results in increased heart rate and blood pressure. When a chronic user stops intake, the body experiences a "rebound" effect of the autonomic nervous system. Therefore, **bradycardia** (decreased heart rate), not tachycardia, is a hallmark feature of nicotine withdrawal. **Analysis of Options:** * **A. Depression:** Dysphoric or depressed mood is a common psychological symptom of withdrawal as dopamine levels in the reward pathway (mesolimbic system) drop. * **B. Headache:** This is a frequent physical complaint during the first few days of smoking cessation due to changes in cerebral blood flow. * **D. Anxiety:** Irritability, frustration, and anxiety are core diagnostic criteria for nicotine withdrawal according to DSM-5. **High-Yield NEET-PG Pearls:** * **DSM-5 Criteria for Nicotine Withdrawal:** Includes irritability, anxiety, difficulty concentrating, increased appetite/weight gain, restlessness, depressed mood, and insomnia. * **Timeline:** Withdrawal symptoms typically peak within **24–48 hours** and can last for 2–4 weeks. * **Weight Gain:** This is a specific feature of nicotine withdrawal (due to increased appetite and metabolic changes), which often leads to relapse, especially in female patients. * **Pharmacotherapy:** First-line treatments include **Nicotine Replacement Therapy (NRT)**, **Varenicline** (partial agonist at α4β2 receptors—most effective), and **Bupropion** (atypical antidepressant).

Q: A person preoccupied with worries about falling ill is described as which of the following?

Hypochondriac. ### Explanation **Correct Answer: B. Hypochondriac** **Hypochondriasis** (now classified in DSM-5 as **Illness Anxiety Disorder**) is characterized by a persistent preoccupation with the fear of having or acquiring a serious, undiagnosed medical illness. This preoccupation is based on a misinterpretation of bodily symptoms (e.g., a minor headache being interpreted as a brain tumor) despite negative medical evaluations and reassurance. The core feature is high anxiety about health rather than the intensity of physical symptoms. **Analysis of Incorrect Options:** * **A. Maniac:** Refers to a person in a state of **Mania** (seen in Bipolar Disorder). It is characterized by an abnormally elevated, expansive, or irritable mood, decreased need for sleep, and pressured speech, rather than health-related worries. * **C. Depressed:** Refers to **Major Depressive Disorder**, characterized by persistent low mood, anhedonia (loss of interest), and feelings of worthlessness. While somatic complaints can occur in depression, the primary feature is not the preoccupation with falling ill. * **D. Delirium:** An acute, transient, and reversible state of confusion characterized by fluctuating consciousness and impaired attention, usually due to an underlying medical condition or substance toxicity. **High-Yield Clinical Pearls for NEET-PG:** * **DSM-5 Update:** Hypochondriasis is now largely replaced by **Illness Anxiety Disorder** (if symptoms are minimal) or **Somatic Symptom Disorder** (if significant physical symptoms are present). * **Duration:** For a diagnosis, the preoccupation must persist for at least **6 months**. * **Doctor Shopping:** These patients frequently undergo multiple investigations and visit various specialists, a behavior known as "doctor shopping." * **Management:** The treatment of choice is **Cognitive Behavioral Therapy (CBT)**. SSRIs may be used if there is comorbid anxiety or depression.

Question 1

What is the most commonly abused substance?

Accepted Answer

Marijuana

Answer

Datura

Answer

Cocaine

Answer

Heroin

Question 2

Which of the following are true about delirium tremens?

Accepted Answer

Clouding of consciousness, coarse tremors, and autonomic dysfunction

Answer

Clouding of consciousness, coarse tremors, and hallucination

Answer

Coarse tremors, hallucination, and autonomic dysfunction

Answer

Clouding of consciousness, hallucination, and autonomic dysfunction

Question 3

Morbid jealousy is associated with which substance?

Accepted Answer

Alcohol

Answer

Heroin

Answer

Cannabis

Answer

LSD

Question 4

Physical withdrawal symptoms are not marked in patients abusing which of the following substances?

Accepted Answer

Cannabis

Answer

Pethidine

Answer

Opium

Answer

Alcohol

Question 5

Which of the following are pharmacologically approved treatments for tobacco addiction?

Accepted Answer

Nicotine and Bupropion

Answer

Bupropion and Mecanylate

Answer

Nicotine and Mecanylate

Answer

Nicotine and Dopamine

Question 6

Korsakoff's psychosis is seen in which of the following conditions?

Accepted Answer

Alcohol withdrawal

Answer

Chronic renal failure (CRF)

Answer

Marasmus

Answer

Cirrhosis

Question 7

Which of the following is a symptom of opioid withdrawal?

Accepted Answer

Piloerection

Answer

Dry skin

Answer

Bradycardia

Answer

Pupillary constriction

Question 8

Which of the following is NOT a feature of nicotine withdrawal?

Accepted Answer

Tachycardia

Answer

Depression

Answer

Headache

Answer

Anxiety

Question 9

A 35-year-old man presented with agitation, global confusion, disorientation, hallucinations, and autonomic hyperactivity. He had his last alcohol drink 5 days ago. Which of the following can be used in the immediate treatment of the condition?

Accepted Answer

Chlordiazepoxide

Answer

Diazepam

Answer

Carbamazepine

Answer

Morphine

Question 10

A person preoccupied with worries about falling ill is described as which of the following?

Accepted Answer

Hypochondriac

Answer

Maniac

Answer

Depressed

Answer

Delirium

Substance Use Disorders — MCQs

Substance Use Disorders — MCQs

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