Substance Use Disorders Practice Questions

Q: Which drugs are known to cause both physical and psychological dependence?

All the above. ### Explanation The core concept in addiction psychiatry is the distinction between **Psychological Dependence** (craving and a compulsive need to use a drug for its pleasurable effects or to avoid distress) and **Physical Dependence** (the body’s adaptation to the drug, manifested by **tolerance** and a specific **withdrawal syndrome** upon cessation). **Why "All the above" is correct:** Most drugs of abuse that act on the brain's reward system (specifically the dopaminergic pathways in the nucleus accumbens) produce both types of dependence: * **Opioids (e.g., Heroin, Morphine):** These cause profound physical dependence. Withdrawal results in "flu-like" symptoms (rhinorrhea, lacrimation, yawning) and severe autonomic hyperactivity. Psychological craving is intense and long-lasting. * **Alcohol:** It is a potent CNS depressant. Physical dependence is evidenced by life-threatening withdrawal symptoms like **Delirium Tremens** and seizures. Psychological dependence is characterized by the "loss of control" over drinking. * **Nicotine:** While often underestimated, nicotine has a very high addictive potential. Physical dependence is marked by irritability, weight gain, and insomnia upon quitting, while psychological dependence is driven by the rapid dopamine spike following inhalation. **Clinical Pearls for NEET-PG:** * **Pure Psychological Dependence:** Classically associated with **Hallucinogens (LSD)** and **Cannabis** (though mild physical withdrawal is now recognized in DSM-5 for cannabis, it is predominantly psychological). * **The "CAGE" Questionnaire:** The most popular screening tool for Alcohol Use Disorder. * **Withdrawal Management:** Benzodiazepines are the drug of choice for Alcohol withdrawal; Methadone or Buprenorphine are used for Opioid substitution. * **Highest Addictive Potential:** Nicotine is often cited as having the highest "capture rate" (percentage of users who become dependent).

Q: Which of the following is characteristic of alcohol withdrawal?

Hallucination. **Explanation:** Alcohol withdrawal occurs due to the sudden cessation of alcohol intake, leading to a state of **CNS hyperexcitability** (due to GABA-receptor downregulation and NMDA-receptor upregulation). **Why Hallucination is Correct:** Hallucinations are a hallmark feature of alcohol withdrawal, typically occurring 12–48 hours after the last drink. The most characteristic type is **Alcoholic Hallucinosis**, where the patient experiences vivid sensory perceptions (most commonly **auditory**, but can be visual or tactile) in a state of **clear consciousness**. This is distinct from Delirium Tremens, where hallucinations occur alongside clouded consciousness and autonomic instability. **Why other options are incorrect:** * **B. Illusion:** While misinterpretations of stimuli can occur, they are not the defining diagnostic characteristic of the withdrawal syndrome compared to hallucinations. * **C. Delusion:** Delusions (fixed false beliefs) are more characteristic of chronic conditions like Alcoholic Paranoia or Schizophrenia, rather than the acute withdrawal phase. * **D. Drowsiness:** Alcohol is a CNS depressant; therefore, withdrawal presents with **insomnia and agitation**, not drowsiness. Drowsiness is a sign of alcohol intoxication or sedative overdose. **High-Yield Clinical Pearls for NEET-PG:** * **Timeline:** * 6–12 hours: Insomnia, tremors, anxiety. * 12–24 hours: Alcoholic hallucinosis (Clear sensorium). * 24–48 hours: Withdrawal seizures ("Rum fits" – Generalized Tonic-Clonic). * 48–72 hours: **Delirium Tremens** (Medical emergency; characterized by confusion and autonomic hyperactivity). * **Drug of Choice:** Benzodiazepines (e.g., Diazepam, Lorazepam). * **Wernicke’s Encephalopathy Triad:** Ataxia, Ophthalmoplegia, and Confusion (due to Thiamine/B1 deficiency). Always give Thiamine before Glucose.

Q: Frigidity is defined as:

Inability to initiate sexual arousal in a female.. ### Explanation **Concept Overview:** The term **Frigidity** is a traditional (though now largely outdated in modern clinical manuals like DSM-5) psychiatric term used to describe **Female Sexual Interest/Arousal Disorder**. It refers to a persistent or recurrent inability to attain or maintain the physiological and psychological response of sexual excitement (such as lubrication or swelling) in a female, or a lack of desire for sexual activity. **Analysis of Options:** * **Option A (Correct):** Frigidity specifically pertains to the female gender. It characterizes the failure of the sexual arousal response, which may be due to psychological factors (anxiety, trauma, depression) or physiological causes. * **Option B (Incorrect):** Inability to initiate or maintain sexual arousal in a male is termed **Erectile Dysfunction (ED)** or Impotence. * **Option C (Incorrect):** Ejaculation occurring immediately after or even before penetration with minimal sexual stimulation is defined as **Premature Ejaculation**. * **Option D (Incorrect):** Option A provides the standard historical definition of the term. **NEET-PG Clinical Pearls:** * **Modern Nomenclature:** In the **DSM-5**, Hypoactive Sexual Desire Disorder and Female Sexual Arousal Disorder have been merged into a single entity: **Female Sexual Interest/Arousal Disorder (FSIAD)**. * **Vaginismus:** Often confused with frigidity, this is the involuntary spasm of the pelvic floor muscles making penetration painful or impossible. * **Dyspareunia:** Refers to genital pain associated with sexual intercourse. * **Management:** Treatment usually involves a combination of Psychotherapy (Sensate Focus exercises), addressing underlying relationship issues, and treating comorbid conditions like depression.

Q: In delirium tremens, all of the following are true, except:

Orientation is clear. **Explanation:** **Delirium Tremens (DT)** is the most severe form of alcohol withdrawal, typically occurring 48–96 hours after the last drink. The hallmark of any "delirium" is a **clouding of consciousness**, which makes **Option D (Orientation is clear)** the correct "except" choice. In DT, patients are profoundly disoriented to time, place, and person. **Analysis of Options:** * **Option A (Gross tremor):** DT is characterized by intense autonomic hyperactivity. Coarse, rhythmic, "gross" tremors are a cardinal feature, often accompanied by tachycardia, hypertension, and diaphoresis. * **Option B (Seen in alcoholic withdrawal):** This is the fundamental etiology. It occurs due to the sudden cessation of alcohol, leading to a "rebound" hyperexcitability of the NMDA receptors and downregulation of GABA receptors. * **Option C (Seizures may occur):** While "Rum Fits" (withdrawal seizures) usually occur 6–48 hours after cessation, they can precede or occur during the onset of DT. Their presence indicates a high risk for progressing to full-blown delirium. **Clinical Pearls for NEET-PG:** 1. **Hallucinations:** In DT, these are most commonly **visual** (e.g., seeing small animals or insects—micropsia/liliputian hallucinations) or tactile (formication), unlike schizophrenia where they are primarily auditory. 2. **Mortality:** If untreated, DT has a mortality rate of up to 20%, usually due to cardiovascular collapse or hyperthermia. 3. **Treatment of Choice:** **Benzodiazepines** (Chlordiazepoxide or Diazepam) are the gold standard. In patients with liver failure, use "LOT" (Lorazepam, Oxazepam, Temazepam). 4. **Key Distinction:** Alcohol Hallucinosis occurs with a **clear sensorium**, whereas Delirium Tremens occurs with **clouded consciousness**.

Q: What substance is known to cause "bad trips"?

Lysergic acid diethylamide (LSD). **Explanation:** **Lysergic acid diethylamide (LSD)** is a potent hallucinogen that acts primarily as a partial agonist at the **5-HT2A receptors**. The term **"bad trip"** refers to an acute adverse psychological reaction characterized by intense anxiety, terrifying hallucinations (often visual), paranoia, and a loss of control. These episodes can lead to "panic-like" states or "psychedelic crises." **Analysis of Options:** * **LSD (Correct):** Known for causing profound sensory distortions and "bad trips." Management of an acute bad trip involves a "talking down" technique in a quiet environment or the use of benzodiazepines. * **Flunitrazepam:** A potent benzodiazepine (often called the "date rape drug") that causes sedation and anterograde amnesia, rather than hallucinogenic "trips." * **Toluene:** An inhalant found in glues/paints. While it causes euphoria and dizziness, its primary clinical concerns are "Sudden Sniffing Death Syndrome" (due to arrhythmias) and leukoencephalopathy. * **Anabolic Androgenic Steroids:** These are associated with "Roid Rage" (increased aggression and irritability) and mood swings, but not classic hallucinogenic bad trips. **High-Yield Clinical Pearls for NEET-PG:** * **Flashbacks (Hallucinogen Persisting Perception Disorder):** Recurrence of the "trip" symptoms weeks or months after the last dose of LSD. * **Synesthesia:** A classic LSD phenomenon where senses blend (e.g., "hearing colors" or "seeing sounds"). * **Pupillary Findings:** LSD typically causes **Mydriasis** (dilated pupils), unlike opioids which cause miosis. * **Tolerance:** LSD shows rapid tolerance (tachyphylaxis) and cross-tolerance with other hallucinogens like Psilocybin.

Q: Withdrawal of heroin produces all the following symptoms except?

Miosis. **Explanation:** The core concept to master for opioid-related questions is that **withdrawal symptoms are generally the physiological opposite of the drug’s acute effects.** Heroin is an opioid agonist. Acute opioid intoxication is characterized by **miosis** (pinpoint pupils) due to stimulation of the parasympathetic pathway via the Edinger-Westphal nucleus. Therefore, during **withdrawal**, the sympathetic nervous system becomes overactive, leading to **mydriasis** (pupillary dilation). Since the question asks for the symptom that does *not* occur during withdrawal, **Miosis (Option D)** is the correct answer as it is a sign of intoxication, not withdrawal. **Analysis of Incorrect Options:** * **Insomnia (Option A):** Opioids are CNS depressants that cause sedation. Withdrawal leads to CNS rebound hyper-excitability, manifesting as severe insomnia and restlessness. * **Piloerection (Option B):** This is a classic sign of sympathetic surge during opioid withdrawal. It gives the skin the appearance of a plucked turkey, leading to the slang term "cold turkey." * **Mydriasis (Option C):** As explained, pupillary dilation is a hallmark sign of the sympathetic overactivity seen in opioid withdrawal. **NEET-PG High-Yield Pearls:** * **Objective Signs of Withdrawal:** Look for the "3 Ls": **L**acrimation, **L**ow mood (dysphoria), and **L**oose stools (diarrhea), along with rhinorrhea and yawning. * **Grade of Severity:** Piloerection and mydriasis indicate a more established withdrawal state compared to early symptoms like anxiety. * **Management:** Clonidine (alpha-2 agonist) is used to treat autonomic hyperactivity; Methadone or Buprenorphine are used for detoxification and maintenance. * **Exception:** Meperidine (Pethidine) is an opioid that uniquely causes **mydriasis** during intoxication (due to its atropine-like action), unlike heroin.

Q: Which one of the following medications is used to aid in smoking cessation?

Bupropion. **Explanation:** **Bupropion** (specifically the sustained-release formulation) is an FDA-approved first-line non-nicotine pharmacotherapy for smoking cessation. Its mechanism involves the inhibition of neuronal reuptake of **Dopamine and Norepinephrine**. By increasing dopamine levels in the nucleus accumbens, it mimics the reward pathway of nicotine, thereby reducing withdrawal symptoms and the urge to smoke. **Analysis of Incorrect Options:** * **Buspirone (A):** An anxiolytic and partial $5-HT_{1A}$ agonist used primarily for Generalized Anxiety Disorder (GAD). It has no proven efficacy in smoking cessation. * **Naltrexone (C):** An opioid antagonist used primarily in the management of **Alcohol dependence** (to reduce cravings) and **Opioid use disorder** (to prevent relapse). * **Fluoxetine (D):** An SSRI used for Depression, OCD, and Bulimia. While depression is often comorbid with smoking, SSRIs are not standard treatments for nicotine withdrawal. **High-Yield Clinical Pearls for NEET-PG:** * **Varenicline** is another first-line agent; it is a **partial agonist** at the $\alpha_4\beta_2$ nicotinic acetylcholine receptors. * **Contraindication:** Bupropion is strictly contraindicated in patients with **Seizure disorders** or **Eating disorders** (Bulimia/Anorexia) as it lowers the seizure threshold. * **Timing:** Patients should start Bupropion 1–2 weeks *before* their target "quit date" to reach steady-state plasma levels. * **Weight Gain:** Bupropion is often preferred for smokers concerned about post-cessation weight gain.

Question 1

Which drugs are known to cause both physical and psychological dependence?

Accepted Answer

All the above

Answer

Opioids

Answer

Alcohol

Answer

Nicotine

Question 2

Which of the following is characteristic of alcohol withdrawal?

Accepted Answer

Hallucination

Answer

Illusion

Answer

Delusion

Answer

Drowsiness

Question 3

Frigidity is defined as:

Accepted Answer

Inability to initiate sexual arousal in a female.

Answer

Inability to initiate sexual arousal in a male.

Answer

Ejaculation occurring immediately after penetration.

Answer

None of the above.

Question 4

Which of the following best describes the relationship between physical and psychic dependence in nicotine dependence?

Accepted Answer

Physical dependence is less than psychic dependence

Answer

Physical dependence is greater than psychic dependence

Answer

Physical dependence is equal to psychic dependence

Answer

There is no tolerance

Question 5

A 40-year-old man with a history of alcohol dependence is admitted to the hospital for a knee injury. Which of the following is the most common cause of delirium within 3 days postoperatively?

Accepted Answer

Delirium tremens

Answer

Pain medication

Answer

Infection

Answer

Stress of surgery

Question 6

In delirium tremens, all of the following are true, except:

Accepted Answer

Orientation is clear

Answer

Gross tremor

Answer

Seen in alcoholic withdrawal

Answer

Seizures may occur

Question 7

What substance is known to cause "bad trips"?

Accepted Answer

Lysergic acid diethylamide (LSD)

Answer

Flunitrazepam

Answer

Toluene

Answer

Anabolic androgenic steroids

Question 8

Withdrawal of heroin produces all the following symptoms except?

Accepted Answer

Miosis

Answer

Insomnia

Answer

Piloerection

Answer

Mydriasis

Question 9

Which one of the following medications is used to aid in smoking cessation?

Accepted Answer

Bupropion

Answer

Buspirone

Answer

Naltrexone

Answer

Fluoxetine

Question 10

A patient presents with coarse tremors, arousal, sweating, irritability, and tachycardia. A history of daily alcohol intake is present. What is the most likely diagnosis?

Accepted Answer

Alcohol withdrawal

Answer

Delirium tremens

Answer

Korsakoff's psychosis

Answer

Opioid withdrawal

Substance Use Disorders — MCQs

Substance Use Disorders — MCQs

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