Substance Use Disorders — MCQs

Substance Use Disorders Indian Medical PG Practice Questions and MCQs

Question 31: The squeeze technique is used for which of the following conditions?

A. Erectile dysfunction
B. Premature ejaculation (Correct Answer)
C. Retrograde ejaculation
D. Antegrade ejaculation

Explanation: **Explanation:** The **squeeze technique** (developed by Masters and Johnson) is a behavioral therapy specifically used for the management of **Premature Ejaculation (PE)**. **1. Why Premature Ejaculation is correct:** The technique involves the partner applying firm pressure to the glans penis (at the frenulum) just as the patient feels the urge to ejaculate. This pressure causes a temporary loss of the urge to climax and may result in a partial loss of erection. By repeating this process, the patient learns to recognize the sensations preceding orgasm and improves sensory awareness, thereby increasing the latency period before ejaculation. A similar behavioral method is the **"Stop-Start" technique** (developed by Semans). **2. Why other options are incorrect:** * **Erectile Dysfunction (A):** This is the inability to achieve or maintain an erection. Treatment typically involves PDE-5 inhibitors (Sildenafil), vacuum constriction devices, or psychosexual counseling, rather than techniques designed to delay climax. * **Retrograde Ejaculation (C):** This occurs when semen enters the bladder instead of exiting through the urethra (often due to sphincter dysfunction). It is a structural or neurological issue, not a behavioral one. * **Antegrade Ejaculation (D):** This is the normal physiological process of ejaculation. It is not a clinical condition requiring the squeeze technique. **Clinical Pearls for NEET-PG:** * **First-line Pharmacotherapy for PE:** Selective Serotonin Reuptake Inhibitors (SSRIs), specifically **Dapoxetine** (due to its rapid onset and short half-life). * **Dual Sex Therapy:** The squeeze technique is often part of a broader behavioral approach involving both partners. * **Definition of PE:** Ejaculation occurring within 1 minute of penetration (lifelong) or 3 minutes (acquired), associated with distress.

Question 32: Which of the following drugs is used for alcohol abstinence?

A. Disulfiram (Correct Answer)
B. Naltrexone
C. Chlordiazepoxide
D. Morphine

Explanation: **Explanation:** The management of Alcohol Use Disorder is divided into two phases: management of acute withdrawal and maintenance of abstinence (relapse prevention). **Correct Option: A. Disulfiram** Disulfiram is a classic **aversive agent** used to maintain abstinence. It works by irreversibly inhibiting the enzyme **Aldehyde Dehydrogenase**. When a patient consumes alcohol while on Disulfiram, acetaldehyde accumulates in the body, leading to the highly unpleasant **Disulfiram-Ethanol Reaction (DER)**, characterized by flushing, tachycardia, nausea, and palpitations. This psychological deterrent discourages the patient from drinking. **Incorrect Options:** * **B. Naltrexone:** While Naltrexone is used in alcohol dependence, its primary role is to **reduce craving** and the "reward" of drinking by blocking opioid receptors. While it helps maintain abstinence, Disulfiram is the classic textbook answer specifically categorized as an abstinence-promoting aversive agent. * **C. Chlordiazepoxide:** This is a long-acting benzodiazepine. It is the **drug of choice for acute alcohol withdrawal** and prevention of Delirium Tremens, but it is not used for long-term abstinence due to its own addictive potential. * **D. Morphine:** This is an opioid agonist and has no role in the treatment of alcohol use disorder; it would potentially lead to poly-substance abuse. **High-Yield Clinical Pearls for NEET-PG:** * **Acamprosate:** Another drug for abstinence; it reduces glutamate activity and is the drug of choice in patients with **liver disease** (unlike Disulfiram/Naltrexone). * **Disulfiram-like reaction:** Can be caused by other drugs like Metronidazole, Griseofulvin, and Cefotetan. * **Topiramate & Baclofen:** Emerging second-line agents for reducing alcohol consumption.

Question 33: Yawning is a feature of which of the following withdrawal syndromes?

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

Explanation: **Explanation:** **Opioid withdrawal** is the correct answer because it presents with a characteristic constellation of symptoms resulting from the hyperactivity of the central and autonomic nervous systems following the cessation of chronic opioid use. **Yawning** is a classic, early, and highly specific sign of opioid withdrawal, often occurring alongside lacrimation (tearing), rhinorrhea (runny nose), and piloerection (goosebumps—the origin of the term "cold turkey"). **Analysis of Options:** * **Alcohol Withdrawal:** Characterized by CNS hyperexcitability. Symptoms include tremors, tachycardia, hypertension, seizures, and delirium tremens. Yawning is not a feature. * **Cocaine Withdrawal:** Primarily involves psychological symptoms such as "the crash" (dysphoria, irritability), intense craving, increased appetite, and hypersomnia (excessive sleep). * **Cannabis Withdrawal:** Presents with irritability, insomnia, decreased appetite, and restlessness, but does not typically include autonomic signs like yawning. **Clinical Pearls for NEET-PG:** * **The "Flu-like" Syndrome:** Opioid withdrawal mimics a severe flu (nausea, vomiting, diarrhea, myalgia, and yawning). * **Objective Signs:** Look for **mydriasis** (dilated pupils) in opioid withdrawal, whereas opioid intoxication presents with **miosis** (pinpoint pupils). * **Management:** The drug of choice for symptomatic relief of autonomic symptoms is **Clonidine** (alpha-2 agonist). For substitution therapy, Methadone or Buprenorphine is used. * **Severity:** While extremely distressing, opioid withdrawal is generally **not life-threatening**, unlike alcohol or benzodiazepine withdrawal, which can cause fatal seizures.

Question 34: Which of the following are psychiatric complications of alcohol dependence?

A. Anxiety
B. Suicide
C. Depression
D. All of the above (Correct Answer)

Explanation: Alcohol dependence is a chronic relapsing brain disorder characterized by a strong desire to consume alcohol, impaired control over its use, and physiological withdrawal states. It is frequently associated with significant psychiatric comorbidity, often referred to as "Dual Diagnosis." **Explanation of the Correct Answer:** The correct answer is **D (All of the above)** because alcohol acts as a potent central nervous system (CNS) depressant and disrupts neurotransmitter balance (GABA, Glutamate, Serotonin, and Dopamine), leading to various psychiatric manifestations: * **Depression:** Alcohol is a primary depressogenic substance. Chronic use leads to "Alcohol-Induced Depressive Disorder." Up to 40% of heavy drinkers meet the criteria for depression. * **Anxiety:** While patients often use alcohol to "self-medicate" social anxiety, chronic use and withdrawal states trigger severe rebound anxiety, panic attacks, and phobias. * **Suicide:** Alcoholism is one of the strongest predictors of suicidal behavior. It increases impulsivity, worsens underlying mood disorders, and leads to social isolation (loss of "protective factors"), significantly raising the risk of completed suicide. **Why other options are incorrect:** Options A, B, and C are individual components of the psychiatric spectrum of alcohol dependence. Since all three are well-documented complications, selecting any single one would be incomplete. **High-Yield Clinical Pearls for NEET-PG:** * **Wernicke-Korsakoff Syndrome:** A neurological complication due to Thiamine (B1) deficiency. Remember the triad for Wernicke’s: **C**onfusion, **A**taxia, **N**ystagmus (**CAN**). * **Alcoholic Hallucinosis:** Characterized by auditory hallucinations (usually threatening) occurring in a clear sensorium, unlike Delirium Tremens. * **Marchiafava-Bignami Disease:** Rare demyelination of the corpus callosum seen in chronic alcoholics. * **Screening:** The **CAGE** questionnaire is the most high-yield screening tool (Cut down, Annoyed, Guilty, Eye-opener).

Question 35: Which of the following drugs is currently widely used in treating opioid-dependent individuals?

A. Codeine
B. Methadone (Correct Answer)
C. Alphaprodine
D. Pentazocine

Explanation: **Explanation:** **Correct Option: B. Methadone** Methadone is a long-acting **synthetic mu-opioid receptor full agonist**. It is the gold standard for **Opioid Substitution Therapy (OST)**. Its effectiveness in treating opioid dependence lies in its unique pharmacokinetics: it has a long half-life (24–36 hours), which prevents the rapid "high" associated with heroin and suppresses withdrawal symptoms for a full day. By inducing cross-tolerance, it also reduces the craving for illicit opioids. **Analysis of Incorrect Options:** * **A. Codeine:** A short-acting weak opioid agonist primarily used as an antitussive or analgesic. It has a high potential for misuse and is not used for maintenance therapy. * **C. Alphaprodine:** A rapid-acting opioid analgesic (similar to pethidine). Due to its short duration of action and high risk of respiratory depression, it is not suitable for dependence treatment and has been largely withdrawn from many markets. * **D. Pentazocine:** An **opioid agonist-antagonist** (kappa agonist and mu antagonist/partial agonist). It can precipitate acute withdrawal symptoms in an opioid-dependent individual and is therefore contraindicated in maintenance therapy. **High-Yield Clinical Pearls for NEET-PG:** * **Buprenorphine:** Another first-line agent for OST; it is a **partial mu-agonist** and kappa antagonist. It has a "ceiling effect" on respiratory depression, making it safer than methadone in overdose. * **Naloxone:** Often added to buprenorphine (Suboxone) to prevent intravenous abuse. * **Naltrexone:** An opioid **antagonist** used for relapse prevention *after* detoxification is complete. * **Clonidine:** An alpha-2 agonist used to manage the autonomic symptoms of acute opioid withdrawal (tachycardia, hypertension, sweating).

Question 36: Which of the following addictions gives rise to Magnan's symptom?

A. Alcohol
B. Cocaine (Correct Answer)
C. LSD
D. Opiates

Explanation: **Explanation:** **Magnan’s symptom** (also known as the "cocaine bug" or formication) is a specific type of tactile hallucination associated with chronic **Cocaine** use. 1. **Why Cocaine is Correct:** Cocaine is a potent stimulant that increases synaptic dopamine levels. Chronic use or acute intoxication can lead to **Cocaine Psychosis**. Magnan’s symptom refers to the false sensation of insects, bugs, or worms crawling under or on the skin. This often leads to "excoriation disorder" behavior, where the patient picks or scratches their skin excessively to remove the imaginary parasites, resulting in characteristic skin lesions known as **"cocaine pits."** 2. **Why Other Options are Incorrect:** * **Alcohol:** While alcohol withdrawal can cause tactile hallucinations (Delirium Tremens), Magnan’s symptom is classically and specifically linked to cocaine. Alcohol is more commonly associated with visual hallucinations (e.g., small animals) or auditory "alcoholic hallucinosis." * **LSD:** This is a hallucinogen primarily known for **visual illusions**, synesthesia (seeing sounds/hearing colors), and "flashbacks." It does not typically cause the specific tactile sensation of formication. * **Opiates:** Opiate use typically results in CNS depression, euphoria, and miosis. Withdrawal causes "gooseflesh" (piloerection), but not the psychotic tactile hallucinations seen in stimulant abuse. **High-Yield Clinical Pearls for NEET-PG:** * **Formication:** The medical term for the sensation of insects crawling on the skin. * **Differential for Formication:** Cocaine use, Amphetamine psychosis, Alcohol withdrawal, and Menopause. * **Cocaine and the Heart:** Cocaine is a common cause of drug-induced myocardial infarction due to coronary vasospasm. * **Pupillary findings:** Cocaine causes **Mydriasis** (dilated pupils), whereas Opiates cause **Miosis** (pinpoint pupils).

Question 37: Excessive desire for substance abuse in a drug addict is called:

A. Craving (Correct Answer)
B. Impulse
C. Dependence
D. Compulsion

Explanation: ### Explanation **Correct Option: A. Craving** In the context of substance use disorders, **craving** is defined as a strong, subjective desire or an overwhelming urge to consume a particular drug. It is a core clinical feature of addiction and is often triggered by environmental cues associated with previous drug use (e.g., seeing a needle or visiting a specific location). In the DSM-5 criteria, craving is specifically highlighted as a diagnostic criterion for Substance Use Disorders. **Analysis of Incorrect Options:** * **B. Impulse:** This refers to a sudden, unpremeditated urge to act without considering the consequences. While addiction involves impulsivity (especially in early stages), "impulse" is a general behavioral term and not the specific clinical term for the "desire" for a drug. * **C. Dependence:** This is a broader physiological or psychological state where the body requires the substance to function normally. It is characterized by **tolerance** (needing more for the same effect) and **withdrawal** (physical symptoms upon cessation). Dependence is the *state*, whereas craving is the *subjective desire*. * **D. Compulsion:** This refers to repetitive behaviors that an individual feels driven to perform, often to reduce anxiety. In addiction, drug-seeking becomes "compulsive" when the user continues despite clear negative consequences, but the "desire" itself is the craving. **High-Yield Clinical Pearls for NEET-PG:** * **Neurobiology:** Craving is primarily mediated by the **Mesolimbic Dopaminergic Pathway** (the "Reward Pathway"), specifically involving the Nucleus Accumbens and the Ventral Tegmental Area (VTA). * **Anti-craving agents:** * **Alcohol:** Naltrexone, Acamprosate. * **Opioids:** Methadone, Buprenorphine. * **Nicotine:** Varenicline, Bupropion. * **Cue-induced craving** is a major cause of relapse even after long periods of abstinence.

Question 38: What is true about dual sex therapy?

A. The patient alone is not treated. (Correct Answer)
B. It uses sildenafil.
C. It treats sexual perversion.
D. It is used for people with dual gender identities.

Explanation: **Explanation:** **Dual Sex Therapy**, pioneered by **Masters and Johnson**, is based on the fundamental principle that there is no such thing as an uninvolved partner in a sexual dysfunction. Therefore, the **"couple" is treated as a single unit**, rather than focusing on one individual as the "patient." 1. **Why Option A is Correct:** In dual sex therapy, the focus is on the relationship and communication between partners. It involves a **male-female therapist team** treating a **male-female couple**. Treating the patient alone is considered ineffective because sexual dysfunction is viewed as a shared problem that manifests within the interaction of the couple. 2. **Why Other Options are Incorrect:** * **Option B:** While Sildenafil (PDE5 inhibitor) is a pharmacological treatment for erectile dysfunction, dual sex therapy is a **behavioral/psychotherapeutic intervention** (e.g., using techniques like Sensate Focus). * **Option C:** Dual sex therapy is indicated for **sexual dysfunctions** (e.g., premature ejaculation, vaginismus, or erectile dysfunction), not for sexual perversions (Paraphilias), which require different modalities like CBT or anti-androgens. * **Option D:** The term "dual" refers to the **dual-therapist team** and the **couple**, not to gender identity disorders or non-binary identities. **High-Yield Clinical Pearls for NEET-PG:** * **Sensate Focus:** The cornerstone technique of dual sex therapy where couples are instructed to touch each other's bodies in non-genital areas to reduce performance anxiety. * **Therapist Composition:** Ideally involves a male and a female therapist to avoid "triangulation" and ensure both partners feel represented. * **Indications:** Most effective for Premature Ejaculation (using the Squeeze or Stop-Start technique) and Vaginismus.

Question 39: Which of the following is FALSE regarding Alcoholics Anonymous?

A. It is a self-help group.
B. It follows 12 steps to quit alcohol.
C. It includes recovered patients and volunteers.
D. It provides incentives for quitting alcohol. (Correct Answer)

Explanation: **Explanation:** Alcoholics Anonymous (AA) is a worldwide, non-professional organization founded in 1935 by Bill Wilson and Dr. Bob Smith. It operates on the principle of **mutual aid** and spiritual growth rather than material or financial rewards. **Why Option D is the correct (False) statement:** AA does **not provide incentives** (such as money, vouchers, or material rewards) for quitting alcohol. The motivation for sobriety in AA is rooted in the "12-step program," peer support, and spiritual awakening. Providing incentives is a feature of **Contingency Management**, a different behavioral therapy technique used in addiction treatment, but it is not a part of the AA model. **Analysis of Incorrect Options:** * **Option A (True):** AA is the prototype of a **self-help group**. It is run by members for members, without professional leadership or government funding. * **Option B (True):** The core philosophy of AA is the **12-step program**, which includes admitting powerlessness over alcohol, making amends, and helping others. * **Option C (True):** The group consists of **recovered alcoholics** who act as "sponsors" and volunteers who share their experiences to help new members achieve sobriety. **High-Yield Clinical Pearls for NEET-PG:** * **Al-Anon:** A support group specifically for the **families and friends** of alcoholics. * **Alateen:** A support group for **teenagers** affected by someone else's alcoholism. * **Anonymity:** The "Anonymous" part of the name signifies that members' identities and shared stories remain confidential, reducing the stigma of seeking help. * **Goal:** The primary goal of AA is **total abstinence**, not controlled drinking.

Question 40: Delirium tremens is characterized by confusion associated with which of the following?

A. Autonomic hyperactivity and tremors (Correct Answer)
B. Features of intoxication due to alcohol
C. Sixth nerve palsy
D. Korsakoff psychosis

Explanation: **Explanation:** **Delirium Tremens (DT)** is the most severe form of alcohol withdrawal, typically occurring 48–96 hours after the last drink. It is a medical emergency characterized by a "clouding of consciousness" (delirium) and significant **autonomic hyperactivity**. 1. **Why Option A is Correct:** The pathophysiology involves the sudden removal of alcohol’s inhibitory effect on GABA receptors and a compensatory overactivity of NMDA (glutamate) receptors. This neuro-excitation manifests as profound autonomic instability (tachycardia, hypertension, fever, diaphoresis) and coarse tremors. Visual and tactile hallucinations (e.g., formication) are also hallmark features. 2. **Why Other Options are Incorrect:** * **Option B:** DT is a **withdrawal** phenomenon, not an intoxication state. Intoxication presents with slurred speech, ataxia, and CNS depression. * **Option C:** Sixth nerve palsy (Abducens nerve) is a classic sign of **Wernicke’s Encephalopathy**, caused by Thiamine (B1) deficiency, not DT. * **Option D:** **Korsakoff Psychosis** is a chronic sequela of Thiamine deficiency characterized by anterograde amnesia and confabulation; it lacks the acute autonomic storm seen in DT. **High-Yield Clinical Pearls for NEET-PG:** * **Timeline:** Minor withdrawal (6–12h) → Seizures (12–48h) → Hallucinosis (12–48h) → **DT (48–96h)**. * **Mortality:** If untreated, DT has a mortality rate of up to 20% (usually due to arrhythmia or hyperthermia). * **Drug of Choice:** **Benzodiazepines** (e.g., Diazepam or Lorazepam) are the gold standard for management. * **Risk Factor:** A history of prior withdrawal seizures or DT increases the risk of recurrence.

Practice by Chapter

Neurobiology of Addiction

Practice Questions

Alcohol Use Disorder

Practice Questions

Opioid Use Disorder

Practice Questions

Cannabis Use Disorder

Practice Questions

Stimulant Use Disorders

Practice Questions

Sedative, Hypnotic, and Anxiolytic Use Disorders

Practice Questions

Tobacco Use Disorder

Practice Questions

Hallucinogen-Related Disorders

Practice Questions

Substance Withdrawal Syndromes

Practice Questions

Pharmacotherapy for Substance Use Disorders

Practice Questions

Psychosocial Interventions

Practice Questions

Dual Diagnosis Management

Practice Questions

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