Substance Use Disorders — MCQs

A chronic smoker who smokes 20 cigarettes per day has developed a chronic cough. His family has suggested quitting cigarettes. He is ready to quit and is thinking about it but is reluctant to do so because he is worried that quitting will make him irritable. Which of the following best describes the stage of behavior change?

Q160Easy

Which of the following is a common cause of amotivation syndrome?

Substance Use Disorders Indian Medical PG Practice Questions and MCQs

Question 151: Marijuana withdrawal syndrome is associated with which of the following symptoms?

A. Irritability (Correct Answer)
B. Seizures
C. Increased sleep
D. Excessive appetite

Explanation: ### Explanation **Correct Option: A. Irritability** Cannabis Withdrawal Syndrome (CWS) is a clinically recognized condition that occurs upon the cessation of heavy or prolonged marijuana use. The underlying mechanism involves the downregulation of **CB1 receptors** in the brain. When the drug is stopped, there is a rebound effect in the central nervous system. **Irritability, anger, or aggression** is one of the most common and earliest symptoms of withdrawal, alongside anxiety, sleep difficulties (insomnia), and decreased appetite. **Analysis of Incorrect Options:** * **B. Seizures:** These are characteristic of withdrawal from CNS depressants like **Alcohol** or **Benzodiazepines**. Cannabis withdrawal does not typically lower the seizure threshold. * **C. Increased sleep:** Withdrawal usually causes **insomnia** or disturbing dreams. Increased sleep (hypersomnia) is more commonly seen during the "crash" phase of **Stimulant withdrawal** (e.g., Cocaine or Amphetamines). * **D. Excessive appetite:** Cannabis intoxication (the "munchies") causes increased appetite. Conversely, **withdrawal** is associated with **decreased appetite** or weight loss. **High-Yield Clinical Pearls for NEET-PG:** * **Timeline:** Symptoms typically peak within **2–6 days** of cessation and can last for 1–2 weeks. * **Diagnostic Criteria (DSM-5):** Requires at least 3 symptoms: Irritability, nervousness/anxiety, sleep difficulty, decreased appetite/weight loss, restlessness, depressed mood, or physical symptoms (e.g., abdominal pain, tremors, sweating, fever, chills, or headache). * **Treatment:** Most cases are mild and managed with supportive care. For severe cases, behavioral therapy or symptomatic pharmacological treatment (e.g., Dronabinol or Gabapentin) may be considered. * **Key Distinction:** Remember that **Miosis** is NOT a feature of cannabis; it typically causes **Conjunctival injection** (red eyes) and tachycardia.

Question 152: All of the following could be true regarding Delirium tremens (DT), EXCEPT:

A. Anterograde amnesia (Correct Answer)
B. Hallucination
C. Anxiety
D. Delusion

Explanation: **Explanation:** **Delirium Tremens (DT)** is the most severe form of alcohol withdrawal, typically occurring 48–96 hours after the last drink. It is characterized by a state of global confusion and severe autonomic hyperactivity. **Why Anterograde Amnesia is the Correct Answer (The Exception):** Anterograde amnesia (the inability to form new memories) is the hallmark of **Wernicke-Korsakoff Syndrome**, not Delirium Tremens. While a patient in DT is disoriented and has impaired attention, the specific neurocognitive deficit of persistent anterograde amnesia is caused by thiamine (Vitamin B1) deficiency leading to damage in the mammillary bodies. **Analysis of Incorrect Options:** * **Hallucinations:** These are a core feature of DT. They are most commonly **visual** (e.g., seeing small animals or insects—zoopsia) but can also be tactile or auditory. * **Anxiety:** Autonomic hyperactivity is a prerequisite for DT. This manifests as intense anxiety, agitation, tremors, tachycardia, hypertension, and diaphoresis. * **Delusions:** Patients often experience paranoid delusions, frequently secondary to their hallucinations (e.g., believing they are being persecuted by the creatures they see). **Clinical Pearls for NEET-PG:** * **Timeline:** DT starts 2–4 days after cessation; Alcohol Hallucinosis starts 12–24 hours (with clear consciousness). * **Mortality:** If untreated, DT has a mortality rate of up to 20% (usually due to arrhythmias or respiratory failure). * **Drug of Choice:** **Benzodiazepines** (Chlordiazepoxide or Diazepam) are the gold standard for management. * **Risk Factors:** Prior history of DT, age >30, and concurrent medical illness.

Question 153: What feature best differentiates dependence from other forms of substance abuse?

A. Easily controlled substance-taking behavior
B. A strong desire to take the substance (Correct Answer)
C. Hallucinations
D. All of the above

Explanation: ### Explanation The core concept differentiating **Dependence** from harmful use or abuse is the psychological and physiological compulsion to consume the substance. **Why Option B is Correct:** According to the **ICD-10 criteria**, dependence is defined by a cluster of physiological, behavioral, and cognitive phenomena. The hallmark feature is a **strong desire or sense of compulsion** to take the substance (often referred to as "craving"). This internal drive represents the psychological component of the dependence syndrome, distinguishing it from simple recreational use or social consumption. **Analysis of Incorrect Options:** * **Option A (Easily controlled behavior):** This is incorrect because **impaired control** is a diagnostic criterion for dependence. Patients find it difficult to stop, start, or limit the amount of substance used, despite intending to do so. * **Option C (Hallucinations):** While hallucinations can occur during acute intoxication (e.g., LSD) or withdrawal (e.g., Delirium Tremens in alcohol), they are not a defining feature of the dependence syndrome itself. Many dependent individuals never experience hallucinations. **High-Yield Clinical Pearls for NEET-PG:** * **ICD-10 Criteria for Dependence:** At least **3 or more** of the following must have occurred together at some time during the previous year: 1. Strong desire/compulsion (Craving). 2. Difficulties in controlling use. 3. Physiological withdrawal state. 4. Evidence of **Tolerance** (needing higher doses for the same effect). 5. Progressive neglect of alternative pleasures/interests. 6. Persisting with use despite clear evidence of harmful consequences. * **Mnemonics:** Remember the "3 out of 6" rule for ICD-10 Dependence. * **Note:** In the newer **DSM-5**, the terms "Abuse" and "Dependence" have been replaced by a single spectrum called **Substance Use Disorder (SUD)**.

Question 154: Which of the following is NOT a feature of opioid withdrawal?

A. Diarrhoea
B. Lacrimation
C. Miosis (Correct Answer)
D. Rhinorrhoea

Explanation: ### Explanation The correct answer is **Miosis (Option C)**. **1. Why Miosis is the Correct Answer:** Opioid withdrawal is characterized by a state of **autonomic hyperactivity** (sympathetic overactivity) as the body reacts to the absence of a central nervous system depressant. While **miosis** (pinpoint pupils) is a classic sign of acute opioid **intoxication**, opioid **withdrawal** causes the opposite effect: **Mydriasis** (pupillary dilation). **2. Analysis of Incorrect Options:** Opioid withdrawal symptoms can be thought of as "everything flowing out" and "everything speeding up": * **Diarrhoea (Option A):** Opioids cause constipation by slowing GI motility. During withdrawal, "rebound" hypermotility leads to abdominal cramps and diarrhoea. * **Lacrimation (Option B) and Rhinorrhoea (Option D):** These are early signs of withdrawal caused by excessive secretory activity. Along with **yawning**, they form a classic triad of early opioid abstinence syndrome. **3. High-Yield Clinical Pearls for NEET-PG:** * **The "Flu-like" Presentation:** Opioid withdrawal mimics a severe flu. Look for myalgias, arthralgias, and piloerection (the origin of the term "cold turkey"). * **Piloerection:** This is a highly specific objective sign of withdrawal. * **Pupillary Rule:** * **Intoxication:** Miosis (Pinpoint pupils). *Exception: Meperidine (Pethidine) can cause mydriasis.* * **Withdrawal:** Mydriasis (Dilated pupils). * **Management:** Clonidine (alpha-2 agonist) is used to manage autonomic symptoms, while Methadone or Buprenorphine are used for detoxification and maintenance. * **Severity:** While extremely distressing, opioid withdrawal is generally **not life-threatening**, unlike alcohol or benzodiazepine withdrawal (which can cause seizures and delirium tremens).

Question 155: Withdrawal from which of the following substances is NOT associated with suicidal tendencies?

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

Explanation: **Explanation:** The core concept behind this question lies in the neurotransmitter changes during withdrawal. Withdrawal from **CNS stimulants** (Cocaine and Amphetamines) and **CNS depressants** (Alcohol) is strongly associated with severe depressive symptoms and emotional dysregulation, which can lead to suicidal ideation. **Why Cannabis is the Correct Answer:** Cannabis withdrawal syndrome (CWS) is characterized by irritability, anxiety, sleep disturbances (insomnia/vivid dreams), decreased appetite, and restlessness. While it causes significant psychological discomfort, it is **not typically associated with major depressive episodes or suicidal tendencies**. The symptoms are generally mild to moderate and peak within the first week of abstinence. **Analysis of Incorrect Options:** * **Cocaine & Amphetamines:** Withdrawal from stimulants leads to a "crash." This involves a profound drop in dopamine levels, resulting in severe dysphoria, anhedonia, and "suicidal ideation." In NEET-PG, **Cocaine withdrawal** is classically associated with the most intense suicidal "crash." * **Alcohol:** Alcohol withdrawal can lead to "Alcoholic Hallucinosis" and severe depressive states. Chronic use also depletes serotonin. The high impulsivity and depressive rebound during withdrawal significantly increase the risk of suicide. **NEET-PG High-Yield Pearls:** * **Cocaine Withdrawal:** Often called the "Crash"; symptoms include hypersomnia, hyperphagia, and severe suicidal ideation. * **Cannabis:** The most common physical sign of withdrawal is **insomnia**; the most common psychological sign is **irritability**. * **Stimulant Withdrawal Treatment:** Usually supportive; no specific FDA-approved medication, unlike Opioids or Alcohol. * **Suicide Risk:** Always prioritize safety in patients withdrawing from Stimulants or Alcohol.

Question 156: A male who did not have alcohol for 2 days presented with seizures. What is the appropriate treatment?

A. Diazepam (Correct Answer)
B. Phenobarbital
C. Disulfiram
D. Thiamine

Explanation: ### Explanation **Correct Answer: A. Diazepam** **Mechanism and Rationale:** The patient is presenting with **Alcohol Withdrawal Seizures** (commonly known as "rum fits"), which typically occur **6 to 48 hours** after the last drink. Alcohol is a CNS depressant that enhances GABA (inhibitory) and inhibits NMDA (excitatory) receptors. Abrupt cessation leads to a state of CNS hyperexcitability. **Benzodiazepines (like Diazepam)** are the gold standard treatment because they are cross-tolerant with alcohol; they stimulate GABA-A receptors, effectively substituting for the alcohol and rapidly raising the seizure threshold to prevent status epilepticus or progression to Delirium Tremens. **Analysis of Incorrect Options:** * **B. Phenobarbital:** While barbiturates can be used in refractory withdrawal cases in ICU settings, they are not the first-line treatment due to a narrower therapeutic index and risk of respiratory depression compared to Benzodiazepines. * **C. Disulfiram:** This is an aldehyde dehydrogenase inhibitor used for **aversion therapy** in alcohol dependence (maintenance). Giving it during acute withdrawal is contraindicated as it does not treat withdrawal symptoms and can cause a dangerous reaction if alcohol is still in the system. * **D. Thiamine:** While essential to prevent **Wernicke’s Encephalopathy**, thiamine does not have anticonvulsant properties and will not stop or prevent seizures. **High-Yield Clinical Pearls for NEET-PG:** 1. **Drug of Choice (DOC):** Long-acting Benzodiazepines (Diazepam or Chlordiazepoxide) are preferred due to their "self-tapering" effect. 2. **Liver Failure Exception:** If the patient has cirrhosis or liver failure, use **LOT** (Lorazepam, Oxazepam, Temazepam) as they undergo extrahepatic metabolism. 3. **Seizure Characteristics:** Withdrawal seizures are typically generalized tonic-clonic (GTCS) and often occur in clusters. 4. **Phenytoin:** It is **ineffective** for alcohol withdrawal seizures.

Question 157: All of the following are forms of opioid replacement therapies except?

A. Naloxone (Correct Answer)
B. Buprenorphine
C. LAAM
D. Methadone

Explanation: **Explanation:** The core concept of **Opioid Replacement Therapy (ORT)**, also known as Opioid Substitution Therapy (OST), is to replace a short-acting, illicit opioid (like Heroin) with a long-acting, legally prescribed opioid agonist or partial agonist. This prevents withdrawal symptoms and reduces drug-seeking behavior without producing a significant "high." **Why Naloxone is the correct answer:** **Naloxone** is a potent, short-acting **pure opioid antagonist**. It works by competitively binding to mu-opioid receptors, rapidly displacing any existing opioids. It is used for the **emergency reversal of opioid overdose**, not for replacement therapy. If given to an opioid-dependent patient, it will precipitate acute withdrawal. **Analysis of incorrect options:** * **Buprenorphine:** A **partial mu-opioid agonist**. It has a high affinity for receptors but low intrinsic activity, making it a mainstay for OST. It is often combined with Naloxone (Suboxone) to prevent intravenous misuse. * **LAAM (Levo-alpha-acetylmethadol):** A long-acting synthetic opioid agonist similar to Methadone. While less commonly used now due to cardiac side effects (QT prolongation), it is historically classified as an ORT agent. * **Methadone:** A long-acting **full mu-opioid agonist**. It is the "gold standard" for ORT, especially in pregnant patients. It has a long half-life, allowing for once-daily dosing. **High-Yield Clinical Pearls for NEET-PG:** * **Naltrexone:** Unlike Naloxone, Naltrexone is a long-acting antagonist used for **relapse prevention** (maintenance of abstinence) after detoxification is complete. * **Clonidine:** An alpha-2 agonist used to manage the autonomic symptoms of opioid withdrawal (e.g., hypertension, tachycardia) but is NOT a replacement therapy. * **Drug of Choice for Overdose:** Naloxone (IV/Intranasal). * **Drug of Choice for Maintenance in Pregnancy:** Methadone.

Question 158: Which of the following is NOT included in the definition of substance abuse syndrome?

A. Withdrawal symptom (Correct Answer)
B. Use despite knowing physical or mental harm
C. Recurrent substance abuse
D. All of the above

Explanation: To understand this question, it is essential to distinguish between **Substance Abuse** and **Substance Dependence** (as defined in ICD-10 and DSM-IV). ### 1. Why "Withdrawal Symptom" is the Correct Answer Withdrawal symptoms are a hallmark of **Substance Dependence**, not Substance Abuse. Dependence is characterized by physiological changes where the body requires the substance to function normally (tolerance) and reacts negatively when the substance is removed (withdrawal). In contrast, "Abuse" refers to a maladaptive pattern of use that leads to significant impairment or distress but has not yet reached the physiological threshold of dependence. ### 2. Analysis of Incorrect Options * **Option B (Use despite harm):** This is a core criterion for Substance Abuse. It refers to continued use even when the individual is aware that the substance is causing or exacerbating a persistent physical or psychological problem (e.g., drinking despite having a gastric ulcer). * **Option C (Recurrent substance abuse):** This is the definition of the syndrome itself. It involves recurrent use resulting in a failure to fulfill major role obligations at work, school, or home, or use in situations that are physically hazardous (e.g., driving while intoxicated). ### 3. High-Yield Clinical Pearls for NEET-PG * **ICD-10 vs. DSM-5:** While older exams differentiate between "Abuse" and "Dependence," **DSM-5** has merged these into a single entity called **Substance Use Disorder (SUD)**, measured on a spectrum of severity. * **Dependence Syndrome (ICD-10):** Requires 3 or more of the following within the last year: 1. Strong desire/compulsion (Craving). 2. Difficulties in controlling onset/termination. 3. **Withdrawal state.** 4. **Tolerance.** 5. Progressive neglect of alternative pleasures. 6. Persisting with use despite clear evidence of harmful consequences. * **Key Distinction:** If a question mentions "Tolerance" or "Withdrawal," always think **Dependence**, not just Abuse.

Question 159: A chronic smoker who smokes 20 cigarettes per day has developed a chronic cough. His family has suggested quitting cigarettes. He is ready to quit and is thinking about it but is reluctant to do so because he is worried that quitting will make him irritable. Which of the following best describes the stage of behavior change?

A. Precontemplation and preparation
B. Contemplation and cost factor
C. Contemplation and sickness susceptibility (Correct Answer)
D. Belief

Explanation: This question tests your understanding of the **Prochaska and DiClemente’s Stages of Change (Transtheoretical Model)** and the **Health Belief Model**. ### 1. Why the Correct Answer is Right The patient is in the **Contemplation stage** of behavior change. In this stage, the individual is aware that a problem exists and is seriously thinking about overcoming it (the patient is "ready to quit and thinking about it") but has not yet made a commitment to take action. This stage is characterized by **ambivalence**—weighing the pros and cons. The second part of the answer refers to **Sickness Susceptibility** (from the Health Belief Model). The patient’s reluctance stems from his perception of the negative consequences of quitting (irritability/withdrawal). In medical psychology, the decision to change is influenced by the perceived threat of the illness versus the perceived barriers to change. ### 2. Why Other Options are Wrong * **A. Precontemplation and preparation:** Precontemplation is "denial" (no intention to quit). Preparation involves setting a quit date or taking small steps (e.g., smoking fewer cigarettes). This patient is stuck in the middle (thinking but reluctant). * **B. Contemplation and cost factor:** While "cost" can be a barrier, the term "sickness susceptibility" more accurately reflects the clinical concern regarding the physiological impact (irritability/withdrawal) of the substance use disorder. * **D. Belief:** This is too vague. While beliefs drive behavior, the specific stage of change must be identified. ### 3. Clinical Pearls for NEET-PG * **Stages of Change Sequence:** Precontemplation (Not ready) → Contemplation (Getting ready/Ambivalence) → Preparation (Ready/Planning) → Action (Acting) → Maintenance (Sustaining) → Relapse (Falling back). * **Motivational Interviewing:** This is the best intervention for a patient in the **Contemplation** stage to help them resolve ambivalence. * **Health Belief Model Components:** Perceived susceptibility, perceived severity, perceived benefits, and perceived barriers. The patient's worry about irritability is a **perceived barrier**.

Question 160: Which of the following is a common cause of amotivation syndrome?

A. Cannabis abuse (Correct Answer)
B. Opioid abuse
C. Alcohol abuse
D. Heroin abuse

Explanation: **Explanation:** **Amotivational Syndrome** is a chronic psychiatric condition characterized by a loss of ambition, apathy, diminished ability to carry out complex plans, and a general lack of interest in social or professional activities. It is classically associated with **long-term, heavy Cannabis abuse (Option A).** The underlying medical concept involves the effect of delta-9-tetrahydrocannabinol (THC) on the brain's reward system. Chronic exposure is thought to lead to a "downregulation" of dopamine signaling in the nucleus accumbens and prefrontal cortex, resulting in a state of emotional blunting and reduced goal-directed behavior. **Why other options are incorrect:** * **Opioid and Heroin abuse (Options B & D):** While chronic opioid use can lead to sedation and social withdrawal, it typically presents with physical dependence, respiratory depression, and miosis. It does not classically manifest as the specific "amotivational syndrome" described in psychiatric literature. * **Alcohol abuse (Option C):** Chronic alcohol use is more commonly associated with cognitive impairment (Wernicke-Korsakoff syndrome), liver cirrhosis, and withdrawal tremors rather than a primary syndrome of apathy and loss of ambition. **High-Yield Clinical Pearls for NEET-PG:** * **Active Ingredient:** Delta-9-THC is the psychoactive component responsible for these effects. * **Flashbacks:** Cannabis is also associated with "post-hallucinogen perception disorder" or flashbacks. * **Psychosis Link:** Heavy cannabis use is a significant risk factor for the precipitation of schizophrenia in genetically predisposed individuals. * **Other Cannabis Effects:** Conjunctival injection (red eyes) and increased appetite ("munchies") are classic acute signs.

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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