Substance Use Disorders Practice Questions

Q: Which of the following drugs is NOT used in the management of alcohol withdrawal?

Naloxone. ### Explanation The management of Alcohol Use Disorder (AUD) is divided into two phases: **Acute Withdrawal** and **Relapse Prevention (Maintenance)**. **Why Naloxone is the Correct Answer:** Naloxone is a competitive **opioid antagonist** with a very short half-life, used primarily for the emergency reversal of **acute opioid overdose**. It has no role in the management of alcohol withdrawal or the long-term treatment of alcoholism. Unlike Naltrexone, it is not effective orally due to high first-pass metabolism. **Analysis of Incorrect Options:** * **Naltrexone (Option A):** An oral opioid antagonist that reduces alcohol cravings and the "reward" feeling by blocking mu-opioid receptors. It is a first-line agent for **relapse prevention**. * **Acamprosate (Option B):** A NMDA receptor antagonist and GABA-A agonist. It helps maintain abstinence by reducing the "negative affect" (insomnia, anxiety) associated with post-withdrawal. It is preferred in patients with **liver disease** (as it is renally excreted). * **Disulfiram (Option D):** An aldehyde dehydrogenase inhibitor. It causes the accumulation of acetaldehyde if alcohol is consumed, leading to an unpleasant "disulfiram-like reaction" (flushing, tachycardia, nausea). It acts as a **psychological deterrent**. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice (DOC) for Acute Alcohol Withdrawal:** Benzodiazepines (e.g., Chlordiazepoxide or Diazepam) to prevent seizures and delirium tremens. * **DOC for Alcoholism in Liver Failure:** Acamprosate (Naltrexone and Disulfiram are hepatotoxic). * **Wernicke’s Encephalopathy:** Always administer **Thiamine (B1)** before Glucose to prevent precipitating acute neurological deterioration. * **Naltrexone** is contraindicated in patients currently using opioids or those in acute opioid withdrawal.

Q: What is the most common feature of alcohol withdrawal?

Tremors. **Explanation:** Alcohol is a Central Nervous System (CNS) depressant that enhances GABAergic (inhibitory) activity and inhibits NMDA (excitatory) receptors. Chronic consumption leads to a compensatory down-regulation of GABA receptors and up-regulation of NMDA receptors. When alcohol is abruptly stopped, this results in **CNS hyperexcitability**, manifesting primarily as autonomic hyperactivity and motor disturbances. **Why Tremors are correct:** **Tremors** (specifically "generalized coarse tremors") are the **earliest and most common** sign of alcohol withdrawal. They typically appear within 6–12 hours after the last drink. Often referred to as "the shakes," they involve the hands, tongue, and eyelids. **Analysis of Incorrect Options:** * **Violent attitude:** While irritability and agitation are common, overt violence is not a cardinal or most frequent feature; it is more characteristic of alcohol intoxication or severe Delirium Tremens. * **Hypertension:** Autonomic hyperactivity (tachycardia, hypertension) does occur, but it is secondary to the generalized sympathetic surge and is less frequent than tremors. * **Hyperventilation:** This is not a classic feature of alcohol withdrawal; respiratory changes are usually minimal unless associated with severe metabolic derangement or anxiety. **High-Yield Facts for NEET-PG:** * **Timeline of Withdrawal:** * 6–12 hours: Insomnia, **Tremors**, anxiety, GI upset. * 12–24 hours: Alcoholic Hallucinosis (most commonly **Visual**). * 24–48 hours: Withdrawal Seizures (Rum fits; generalized tonic-clonic). * 48–72 hours: **Delirium Tremens** (Medical emergency: clouding of consciousness, autonomic instability). * **Drug of Choice:** Benzodiazepines (e.g., Chlordiazepoxide or Diazepam). For patients with liver failure, use **LOT** (Lorazepam, Oxazepam, Temazepam).

Q: Which of the following is NOT used for nicotine deaddiction?

Nicotine subcutaneous Injection. **Explanation:** The goal of **Nicotine Replacement Therapy (NRT)** is to provide a controlled dose of nicotine to relieve withdrawal symptoms while avoiding the rapid "spike" in blood nicotine levels that reinforces addiction. **Why Option D is Correct:** **Nicotine subcutaneous injections** are not used for deaddiction because they would cause a rapid rise in plasma nicotine levels, mimicking the pharmacokinetics of smoking. This high "bolus" effect maintains the addictive potential rather than tapering it. Furthermore, nicotine is highly irritating to tissues, making repeated injections impractical and painful. **Why Other Options are Incorrect:** * **A, B, & C (Patch, Spray, Inhaler):** These are all FDA-approved forms of NRT. They deliver nicotine through mucosal or transdermal routes, ensuring a slower, more stable rise in plasma concentration compared to smoking. * **Nicotine Patch:** Provides the most stable, long-acting basal level of nicotine. * **Nicotine Spray/Inhaler:** These are short-acting methods used to manage acute cravings (breakthrough symptoms). **High-Yield Clinical Pearls for NEET-PG:** * **First-line Pharmacotherapy:** Includes NRT, **Varenicline** (most effective monotherapy; a partial agonist at $\alpha4\beta2$ nicotinic receptors), and **Bupropion** (an atypical antidepressant). * **Varenicline Side Effects:** Most common is nausea; historically linked to neuropsychiatric symptoms (though recent data suggests it is safer than previously thought). * **Bupropion Contraindications:** Avoid in patients with a history of seizures or eating disorders (Bulimia/Anorexia), as it lowers the seizure threshold. * **Mechanism:** NRT works by stimulating nicotinic acetylcholine receptors in the ventral tegmental area, reducing the withdrawal-induced dopamine drop.

Q: The Cage test is used for the diagnosis of which of the following?

Alcoholism. **Explanation:** The **CAGE questionnaire** is a globally recognized, high-yield screening tool used specifically for **Alcohol Use Disorder (Alcoholism)**. It is designed to identify problematic drinking patterns rather than the quantity of alcohol consumed. The acronym **CAGE** stands for: * **C (Cut down):** Have you ever felt you should cut down on your drinking? * **A (Annoyed):** Have people annoyed you by criticizing your drinking? * **G (Guilty):** Have you ever felt bad or guilty about your drinking? * **E (Eye-opener):** Have you ever had a drink first thing in the morning to steady your nerves or get rid of a hangover? A score of **2 or more** is considered clinically significant, indicating a high probability of alcohol dependence. **Analysis of Incorrect Options:** * **Opioid abuse:** Screening for opioid use usually involves the DAST (Drug Abuse Screening Test) or clinical assessment of withdrawal/intoxication signs. * **Schizophrenia:** This is a primary psychotic disorder diagnosed using ICD-11 or DSM-5 criteria (e.g., delusions, hallucinations, disorganized speech) lasting at least 1–6 months. * **Paranoid Psychosis:** This is a symptom or subtype of delusional disorder/schizophrenia and is diagnosed through clinical psychiatric evaluation, not a four-question screening tool. **High-Yield Clinical Pearls for NEET-PG:** 1. **Sensitivity:** CAGE is highly sensitive for detecting dependence but less sensitive for "at-risk" drinking. 2. **T-ACE & AUDIT:** The **AUDIT** (Alcohol Use Disorders Identification Test) is the "Gold Standard" for screening in primary care. **T-ACE** is a modified version used specifically for pregnant women. 3. **CIWA-Ar:** This scale is used to monitor the severity of **Alcohol Withdrawal**, not for initial screening/diagnosis.

Q: What is the recommended daily dose of thiamine for patients with delirium tremens?

250 mg per oral or parenteral daily for the first 3-5 days. **Explanation:** In patients with **Delirium Tremens (DT)** or severe alcohol withdrawal, there is a high risk of underlying **Wernicke’s Encephalopathy (WE)** due to chronic thiamine (Vitamin B1) deficiency. Thiamine is a critical cofactor for glucose metabolism; without it, neuronal death occurs in the mammillary bodies and thalamus. **Why Option B is Correct:** Current clinical guidelines (including those often cited in psychiatric textbooks like Kaplan & Sadock) recommend a prophylactic or therapeutic dose of **250 mg of thiamine** administered parenterally (IM/IV) or orally once daily for the first **3 to 5 days** of withdrawal management. This dose is sufficient to prevent the onset of Wernicke-Korsakoff Syndrome during the acute metabolic stress of delirium tremens. **Analysis of Incorrect Options:** * **Option A (100-200 mg):** While 100 mg is often used for routine nutritional supplementation, it is considered inadequate for the high-demand state of Delirium Tremens or suspected WE. * **Options C & D (400-500 mg):** While higher doses (500 mg TDS) are the gold standard for *confirmed* Wernicke’s Encephalopathy, 250 mg is the standard recommendation for the general management of withdrawal/DT in most standard Indian medical curricula and exams. **High-Yield Clinical Pearls for NEET-PG:** * **The "Glucose Rule":** Always administer thiamine **before** or concurrently with IV glucose. Giving glucose first can precipitate Wernicke’s Encephalopathy by consuming the last remaining stores of thiamine. * **Wernicke’s Triad:** Confusion, Ataxia, and Ophthalmoplegia (usually 6th nerve palsy). * **Korsakoff Psychosis:** Characterized by anterograde amnesia and **confabulation** (filling memory gaps with fabricated stories). * **Drug of Choice for DT:** Benzodiazepines (e.g., Diazepam or Lorazepam).

Q: The Audit test is used for the screening of which of the following conditions?

Alcohol use disorder. **Explanation:** The **AUDIT (Alcohol Use Disorders Identification Test)** is a 10-item screening tool developed by the World Health Organization (WHO) to assess alcohol consumption, drinking behaviors, and alcohol-related problems. It is considered the "gold standard" for screening in primary care settings because it can detect both hazardous drinking and fully developed dependence. **Analysis of Options:** * **A. Alcohol use disorder (Correct):** AUDIT specifically evaluates three domains: hazardous alcohol use, dependence symptoms, and harmful alcohol use. A score of **8 or more** in men (7 in women) is generally indicative of hazardous or harmful alcohol use. * **B. Opioid use disorder:** Screening for opioids often utilizes the **DAST-10** (Drug Abuse Screening Test) or the **COWS** (Clinical Opiate Withdrawal Scale) for assessment of withdrawal severity. * **C. Sexual abuse:** Screening involves clinical interviews or specific trauma-informed tools like the **HITS** (Hurt, Insult, Threaten, Scream) for domestic violence, but not AUDIT. * **D. Cannabis abuse:** Similar to opioids, cannabis use is typically screened using the **ASSIST** (Alcohol, Smoking, and Substance Involvement Screening Test) or the **CUDIT-R** (Cannabis Use Disorder Identification Test - Revised). **High-Yield Clinical Pearls for NEET-PG:** * **CAGE Questionnaire:** A shorter 4-item screen for alcohol (Cut down, Annoyed, Guilty, Eye-opener). A score of $\geq$ 2 is significant. * **ASSIST:** Developed by WHO to screen for *all* psychoactive substances (tobacco, alcohol, and illicit drugs). * **Gold Standard for Alcohol Withdrawal:** **CIWA-Ar** (Clinical Institute Withdrawal Assessment for Alcohol). * **Biochemical Marker:** **GGT** (Gamma-glutamyl transferase) is the most sensitive lab marker for chronic heavy drinking, while **Carbohydrate Deficient Transferrin (CDT)** is the most specific.

Q: A 20-year-old man presents with symptoms suggestive of acute stimulant intoxication. Which of the following conditions do his symptoms most closely resemble?

Mania. **Explanation:** The correct answer is **Mania**. **Why Mania is correct:** Acute stimulant intoxication (caused by substances like cocaine or amphetamines) results in a massive surge of catecholamines (dopamine and norepinephrine) in the brain. This physiological state creates a clinical picture that is almost indistinguishable from a manic episode. Common shared features include **euphoria, increased energy, psychomotor agitation, pressured speech, decreased need for sleep, grandiosity, and heightened sympathetic activity** (tachycardia, pupillary dilation). In severe cases, both can present with paranoid delusions or hallucinations. **Why other options are incorrect:** * **Alcohol intoxication:** This typically presents with CNS depression, slurred speech, ataxia, and disinhibition, which is the opposite of the hyper-aroused state seen in stimulant use. * **Antisocial personality disorder (ASPD):** While individuals with ASPD have higher rates of substance abuse, the disorder itself is a chronic pattern of behavior (disregard for rules, lack of empathy) rather than an acute symptomatic state. * **Obsessive-compulsive disorder (OCD):** OCD is characterized by intrusive thoughts and repetitive rituals. It does not feature the euphoria or sympathetic overactivity characteristic of stimulants. **High-Yield Clinical Pearls for NEET-PG:** * **Pupillary Sign:** Stimulant intoxication causes **Mydriasis** (dilated pupils), whereas Opioid intoxication causes **Miosis** (pinpoint pupils). * **Cocaine vs. Amphetamine:** Cocaine has a shorter half-life and is associated with "formication" (the sensation of bugs crawling on skin, known as **Cocaine bugs** or Magnan’s sign). * **Treatment:** The first-line management for acute stimulant-induced agitation or psychosis is **Benzodiazepines** (e.g., Lorazepam). Avoid beta-blockers alone due to the risk of unopposed alpha-adrenergic stimulation.

Q: What is the most severe manifestation of alcohol withdrawal syndrome?

Delirium tremens. **Explanation:** **Delirium Tremens (DT)** is the most severe and life-threatening manifestation of alcohol withdrawal, occurring in approximately 5% of patients, usually **48 to 96 hours** after the last drink. It is a medical emergency characterized by a "clouding of consciousness" (delirium) and severe autonomic hyperactivity (tachycardia, hypertension, fever, and diaphoresis). The underlying pathophysiology involves a profound neurochemical rebound due to the sudden removal of alcohol's inhibitory effect on GABA receptors and the compensatory overactivity of NMDA (glutamate) receptors. Untreated DT has a mortality rate of up to 20%, primarily due to cardiovascular collapse or hyperthermia. **Analysis of Incorrect Options:** * **Wernicke's Encephalopathy (A):** This is a neurological complication of chronic alcohol use due to **Thiamine (B1) deficiency**, not a manifestation of the withdrawal syndrome itself. * **Seizures (C):** Also known as "rum fits," these typically occur early (**6–48 hours**) after cessation. While serious, they are usually self-limiting and less life-threatening than the systemic collapse seen in DT. * **Alcoholic Hallucinosis (D):** This involves vivid auditory or visual hallucinations with a **clear sensorium** (the patient is alert and oriented). It occurs within 12–24 hours and lacks the autonomic instability and delirium that define the severity of DT. **High-Yield Clinical Pearls for NEET-PG:** * **Timeline:** Tremors (6-12h) → Seizures (6-48h) → Hallucinosis (12-24h) → DT (48-96h). * **Drug of Choice:** Benzodiazepines (e.g., Diazepam, Lorazepam) are the gold standard for managing withdrawal. * **Prophylaxis:** Chlordiazepoxide is commonly used for detoxification. * **Distinction:** The hallmark of DT is **altered sensorium + autonomic instability**, whereas Hallucinosis has a **clear sensorium**.

Q: Which of the following drugs is NOT used in alcohol dependence to prevent relapse?

Fluoxetine. **Explanation:** The goal of pharmacological treatment in alcohol dependence is to maintain abstinence and reduce craving. **Fluoxetine** is a Selective Serotonin Reuptake Inhibitor (SSRI) primarily used for Depression and Anxiety disorders. While it may be used to treat comorbid depression in an alcoholic patient, it has **no proven efficacy** in preventing relapse or reducing alcohol consumption in non-depressed patients. **Analysis of Options:** * **Acamprosate (Option C):** An NMDA receptor antagonist and GABA-A agonist. It restores the chemical balance in the brain disrupted by chronic alcohol use. It is a first-line drug specifically used to **maintain abstinence** (reduce the "desire" to drink). * **Nalmefene (Option B):** An opioid system modulator (mu/delta antagonist and kappa partial agonist). Similar to Naltrexone, it is used to **reduce the "reward"** associated with drinking and decrease heavy drinking days. * **Topiramate (Option D):** An anti-epileptic that facilitates GABA neurotransmission and inhibits glutamate. It is an "off-label" but evidence-based second-line agent used to **reduce cravings** and promote abstinence. **High-Yield Clinical Pearls for NEET-PG:** * **FDA-Approved drugs for Alcohol Dependence:** Disulfiram (Aversion therapy), Acamprosate, and Naltrexone. * **Acamprosate** is preferred in patients with **liver disease** (excreted renally). * **Naltrexone** is preferred in patients with **renal failure** (metabolized by the liver) but is contraindicated in acute hepatitis or opioid users. * **Disulfiram** acts by inhibiting **Aldehyde Dehydrogenase**, leading to the accumulation of Acetaldehyde (causing the unpleasant Disulfiram-Ethanol Reaction).

Q: What is the detoxification treatment for alcohol intoxication?

Benzodiazepines for 7-14 days. **Explanation:** The primary goal of alcohol detoxification is to manage withdrawal symptoms and prevent life-threatening complications like **Delirium Tremens** and **Wernicke’s Encephalopathy**. **1. Why Option A is Correct:** Benzodiazepines (BZDs) are the gold standard for alcohol detoxification because they show **cross-tolerance** with alcohol. Both substances act as GABA-A receptor agonists. When alcohol is withdrawn, BZDs substitute for its effect, preventing neuronal hyperexcitability. The standard detoxification protocol typically lasts **7 to 14 days**, allowing for a gradual tapering of the dose to prevent rebound withdrawal while ensuring the patient is safely past the peak window of seizure risk (usually 24–48 hours) and delirium (72–96 hours). **2. Why Other Options are Incorrect:** * **Option B:** While barbiturates have been used historically, they have a narrower therapeutic index and a higher risk of respiratory depression compared to BZDs. * **Option C:** One month is unnecessarily long for acute detoxification. Prolonged use increases the risk of dependence and cognitive impairment. * **Option D:** Two days is insufficient. Alcohol withdrawal symptoms can peak at 72 hours and persist for up to a week; stopping treatment too early increases the risk of withdrawal seizures and Delirium Tremens. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice (DOC):** Long-acting BZDs like **Chlordiazepoxide** or **Diazepam** are preferred due to smoother tapering. * **Liver Disease Exception:** In patients with liver cirrhosis or elderly patients, use **LOT** (Lorazepam, Oxazepam, Temazepam) as they do not have active metabolites and are not dependent on hepatic oxidation. * **Wernicke’s Prophylaxis:** Always administer **Thiamine (Vitamin B1)** before glucose to prevent precipitating Wernicke’s Encephalopathy.

Question 1

Which of the following drugs is NOT used in the management of alcohol withdrawal?

Accepted Answer

Naloxone

Answer

Naltrexone

Answer

Acamprosate

Answer

Disulfiram

Question 2

What is the most common feature of alcohol withdrawal?

Accepted Answer

Tremors

Answer

Violent attitude

Answer

Hypertension

Answer

Hyperventilation

Question 3

Which of the following is NOT used for nicotine deaddiction?

Accepted Answer

Nicotine subcutaneous Injection

Answer

Nicotine Patch

Answer

Nicotine Spray

Answer

Nicotine Inhaler

Question 4

The Cage test is used for the diagnosis of which of the following?

Accepted Answer

Alcoholism

Answer

Opioid abuse

Answer

Schizophrenia

Answer

Paranoid Psychosis

Question 5

What is the recommended daily dose of thiamine for patients with delirium tremens?

Accepted Answer

250 mg per oral or parenteral daily for the first 3-5 days

Answer

100-200 mg per oral or parenteral daily

Answer

400 mg per oral or parenteral daily

Answer

500 mg per oral or parenteral daily

Question 6

The Audit test is used for the screening of which of the following conditions?

Accepted Answer

Alcohol use disorder

Answer

Opioid use disorder

Answer

Sexual abuse

Answer

Cannabis abuse

Question 7

A 20-year-old man presents with symptoms suggestive of acute stimulant intoxication. Which of the following conditions do his symptoms most closely resemble?

Accepted Answer

Mania

Answer

Alcohol intoxication

Answer

Antisocial personality disorder

Answer

Obsessive-compulsive disorder

Question 8

What is the most severe manifestation of alcohol withdrawal syndrome?

Accepted Answer

Delirium tremens

Answer

Wernicke's encephalopathy

Answer

Seizures

Answer

Alcoholic hallucinosis

Question 9

Which of the following drugs is NOT used in alcohol dependence to prevent relapse?

Accepted Answer

Fluoxetine

Answer

Nalmefene

Answer

Acamprosate

Answer

Topiramate

Question 10

What is the detoxification treatment for alcohol intoxication?

Accepted Answer

Benzodiazepines for 7-14 days

Answer

Barbiturates for 10 days

Answer

Benzodiazepines for 1 month

Answer

Benzodiazepines for 2 days

Substance Use Disorders — MCQs

Substance Use Disorders — MCQs

On this page

Practice by Chapter

Want unlimited practice?