Chlordiazepoxide MCQs With Answer is a focused review resource tailored for B.Pharm students studying benzodiazepine pharmacology. This collection emphasizes chlordiazepoxide’s mechanism of action as a GABA-A receptor positive allosteric modulator, clinical uses (anxiety, alcohol withdrawal, preoperative sedation), long-acting classification, pharmacokinetics, adverse effects, dependence, and key drug interactions. Each question is designed to deepen understanding of dosage forms, metabolism, contraindications, monitoring, and management of toxicity. Ideal for revision, practical exams, and competitive tests, these MCQs reinforce core concepts and clinical reasoning in pharmacy practice. ‘Now let’s test your knowledge with 50 MCQs on this topic.’
Q1. What is the primary mechanism of action of chlordiazepoxide?
- Selective serotonin reuptake inhibition
- Blockade of NMDA receptors
- Positive allosteric modulation of GABA-A receptors
- Inhibition of monoamine oxidase
Correct Answer: Positive allosteric modulation of GABA-A receptors
Q2. Chlordiazepoxide belongs to which class of drugs?
- Barbiturates
- Benzodiazepines
- Beta-blockers
- Antipsychotics
Correct Answer: Benzodiazepines
Q3. A major clinical indication for chlordiazepoxide is:
- Type 2 diabetes management
- Alcohol withdrawal syndrome
- Anticoagulation in atrial fibrillation
- Antibiotic-associated diarrhea
Correct Answer: Alcohol withdrawal syndrome
Q4. Compared with midazolam and alprazolam, chlordiazepoxide is best described as:
- Ultra-short-acting
- Short-acting
- Intermediate-acting
- Long-acting
Correct Answer: Long-acting
Q5. The most appropriate antidote for benzodiazepine overdose including chlordiazepoxide is:
- Naloxone
- Flumazenil
- Activated charcoal
- Physostigmine
Correct Answer: Flumazenil
Q6. Chlordiazepoxide primarily enhances the effect of which inhibitory neurotransmitter?
- Glutamate
- Dopamine
- GABA (gamma-aminobutyric acid)
- Acetylcholine
Correct Answer: GABA (gamma-aminobutyric acid)
Q7. Which of the following is a common adverse effect of chlordiazepoxide?
- Hyperreflexia
- Insomnia
- Excessive sedation and drowsiness
- Hypertension
Correct Answer: Excessive sedation and drowsiness
Q8. Chlordiazepoxide is contraindicated or used with caution in which condition?
- Hypothyroidism
- Myasthenia gravis
- Migraine without aura
- Vitamin D deficiency
Correct Answer: Myasthenia gravis
Q9. Which statement about dependence and withdrawal of chlordiazepoxide is true?
- Long-term use never leads to tolerance
- Abrupt cessation can cause withdrawal symptoms including anxiety and seizures
- Withdrawal is insignificant because it is not addictive
- Withdrawal only occurs after intravenous use
Correct Answer: Abrupt cessation can cause withdrawal symptoms including anxiety and seizures
Q10. Co-administration of chlordiazepoxide with alcohol primarily leads to:
- Reduced sedative effect
- Additive central nervous system depression
- Protection from liver injury
- Increased urinary excretion of chlordiazepoxide
Correct Answer: Additive central nervous system depression
Q11. Which population is at increased risk of prolonged sedation with chlordiazepoxide?
- Young adults aged 20–30 years
- Pediatric patients under 2 years
- Elderly patients with reduced hepatic clearance
- Athletes using anabolic steroids
Correct Answer: Elderly patients with reduced hepatic clearance
Q12. The primary route of elimination for chlordiazepoxide and its metabolites is:
- Renal excretion after hepatic metabolism
- Exhalation via lungs
- Biliary excretion unchanged
- Direct sweat excretion
Correct Answer: Renal excretion after hepatic metabolism
Q13. Which enzyme system is most relevant for the hepatic metabolism of many benzodiazepines, potentially including chlordiazepoxide?
- CYP3A4 and other cytochrome P450 enzymes
- Alcohol dehydrogenase
- MAO-A
- Acetylcholinesterase
Correct Answer: CYP3A4 and other cytochrome P450 enzymes
Q14. In treating severe acute agitation, chlordiazepoxide is preferred over short-acting benzodiazepines because:
- It has faster onset of action than all benzodiazepines
- It provides prolonged anxiolysis due to long duration
- It has no risk of respiratory depression
- It is available only intravenously
Correct Answer: It provides prolonged anxiolysis due to long duration
Q15. Which of the following clinical uses is NOT typical for chlordiazepoxide?
- Management of anxiety disorders
- Treatment of alcohol withdrawal
- Maintenance therapy for chronic epilepsy as first-line monotherapy
- Preoperative sedation
Correct Answer: Maintenance therapy for chronic epilepsy as first-line monotherapy
Q16. A major safety concern when prescribing chlordiazepoxide with opioids is:
- Reduced analgesic effect of opioids
- Synergistic respiratory depression and sedation
- Prevention of opioid tolerance
- Induction of opioid metabolism leading to withdrawal
Correct Answer: Synergistic respiratory depression and sedation
Q17. Which dosage form(s) is chlordiazepoxide commonly available in?
- Oral capsules and tablets
- Inhaler aerosol
- Topical cream
- Transdermal patch
Correct Answer: Oral capsules and tablets
Q18. In pregnancy, benzodiazepines like chlordiazepoxide are associated with:
- Clear evidence of major teratogenicity at therapeutic doses
- Potential neonatal respiratory depression and floppy infant syndrome when used near delivery
- Improved fetal neurodevelopment
- No placental transfer
Correct Answer: Potential neonatal respiratory depression and floppy infant syndrome when used near delivery
Q19. Which monitoring parameter is most important when initiating chlordiazepoxide in an elderly patient?
- Serum potassium level
- Assessment for sedation, falls risk, and cognitive impairment
- Fasting blood glucose
- Pulmonary function testing
Correct Answer: Assessment for sedation, falls risk, and cognitive impairment
Q20. Which of the following best describes a paradoxical reaction to chlordiazepoxide?
- Expected sedation in anxious patients
- Development of agitation, aggression, or disinhibition
- Improved sleep quality
- Progressive hypertension
Correct Answer: Development of agitation, aggression, or disinhibition
Q21. Which clinical strategy reduces the risk of severe benzodiazepine withdrawal when stopping long-term chlordiazepoxide?
- Abrupt discontinuation after long-term use
- Switching to a shorter-acting benzodiazepine immediately
- Gradual dose tapering over weeks to months
- Substituting an opioid for withdrawal management
Correct Answer: Gradual dose tapering over weeks to months
Q22. Which laboratory test is most useful for detecting recent use of chlordiazepoxide?
- Serum lithium level
- Urine toxicology screen for benzodiazepines
- Complete blood count
- Serum amylase
Correct Answer: Urine toxicology screen for benzodiazepines
Q23. Which of the following interactions may increase plasma concentrations of chlordiazepoxide?
- CYP3A4 enzyme induction by rifampicin
- CYP3A4 inhibition by ketoconazole
- Concurrent use of vitamin C supplements
- Co-administration with metformin
Correct Answer: CYP3A4 inhibition by ketoconazole
Q24. Which adverse effect is most associated with long-term benzodiazepine use including chlordiazepoxide?
- Decreased appetite without psychological effects
- Cognitive impairment and memory problems
- Improved long-term cognitive function
- Permanent increase in basal metabolic rate
Correct Answer: Cognitive impairment and memory problems
Q25. Chlordiazepoxide’s role in alcohol withdrawal management is primarily to:
- Prevent seizures and reduce autonomic hyperactivity
- Act as a diuretic to remove alcohol
- Provide antibiotic coverage
- Detoxify acetaldehyde
Correct Answer: Prevent seizures and reduce autonomic hyperactivity
Q26. Flumazenil reverses benzodiazepine effects by:
- Acting as a benzodiazepine receptor antagonist at the GABA-A receptor complex
- Increasing benzodiazepine metabolism in the liver
- Enhancing renal excretion of benzodiazepines
- Blocking opioid receptors
Correct Answer: Acting as a benzodiazepine receptor antagonist at the GABA-A receptor complex
Q27. Which of the following is a typical sign of benzodiazepine overdose?
- Marked agitation without sedation
- Excessive somnolence, slurred speech, and ataxia
- Isolated severe hypertension
- Painless jaundice
Correct Answer: Excessive somnolence, slurred speech, and ataxia
Q28. Which statement about chlordiazepoxide pharmacokinetics is accurate?
- It is not absorbed orally
- It has multiple active metabolites contributing to prolonged effect
- It is eliminated entirely unchanged in feces within hours
- It crosses the blood–brain barrier but not the placenta
Correct Answer: It has multiple active metabolites contributing to prolonged effect
Q29. A pharmacy student should counsel a patient starting chlordiazepoxide to avoid:
- Driving or operating heavy machinery until response is known
- Eating citrus fruits
- Using topical moisturizers
- Sleeping
Correct Answer: Driving or operating heavy machinery until response is known
Q30. Which benzodiazepine property best explains risk of accumulation in chronic dosing with chlordiazepoxide?
- Low lipid solubility
- Short elimination half-life with no metabolites
- High lipid solubility and active metabolites with long half-lives
- Exclusively renal excretion unchanged
Correct Answer: High lipid solubility and active metabolites with long half-lives
Q31. For B.Pharm students, which parameter is essential when comparing benzodiazepines like chlordiazepoxide and lorazepam?
- Brand name only
- Relative onset, duration of action, and presence of active metabolites
- Colour of tablets
- Cost in different pharmacies exclusively
Correct Answer: Relative onset, duration of action, and presence of active metabolites
Q32. Which coexisting condition increases the hazard of respiratory depression with chlordiazepoxide?
- Controlled hypothyroidism
- Chronic obstructive pulmonary disease (COPD)
- Mild seasonal allergies
- Stable glaucoma controlled with drops
Correct Answer: Chronic obstructive pulmonary disease (COPD)
Q33. Which of the following is a pharmacodynamic interaction risk with chlordiazepoxide?
- CYP induction reducing chlordiazepoxide levels
- Competition for renal tubular secretion
- Combined CNS depression with other sedatives (e.g., antihistamines, opioids)
- Inhibition of platelet aggregation
Correct Answer: Combined CNS depression with other sedatives (e.g., antihistamines, opioids)
Q34. When preparing an MCQ on chlordiazepoxide metabolism for exams, a key teaching point is:
- It undergoes extensive hepatic metabolism forming active metabolites
- Metabolism is entirely through renal acetylation without hepatic involvement
- It is metabolized to glucose in the liver
- It bypasses hepatic metabolism due to molecular size
Correct Answer: It undergoes extensive hepatic metabolism forming active metabolites
Q35. Which clinical scenario warrants extreme caution or avoidance of chlordiazepoxide?
- Acute narrow-angle glaucoma
- Stable osteoarthritis
- Controlled hyperlipidemia
- Seasonal allergic rhinitis
Correct Answer: Acute narrow-angle glaucoma
Q36. What is an important counseling point regarding alcohol and chlordiazepoxide?
- Alcohol reduces chlordiazepoxide effectiveness
- Concurrent use can enhance drowsiness and may be life-threatening
- Alcohol prevents dependence on chlordiazepoxide
- Alcohol speeds up chlordiazepoxide elimination making it safer
Correct Answer: Concurrent use can enhance drowsiness and may be life-threatening
Q37. In a patient with hepatic impairment, dosing of chlordiazepoxide should generally be:
- Increased to overcome reduced bioavailability
- Unchanged because liver does not affect it
- Reduced or used cautiously due to impaired metabolism and accumulation
- Switched to an opioid analgesic
Correct Answer: Reduced or used cautiously due to impaired metabolism and accumulation
Q38. For laboratory-based formulation studies, which property of chlordiazepoxide is relevant?
- It is highly hydrophilic and cannot cross membranes
- Its lipophilicity influences absorption and CNS penetration
- It is a protein polymer used in tablets
- It sublimes at room temperature making tablets unstable
Correct Answer: Its lipophilicity influences absorption and CNS penetration
Q39. Which of the following is an appropriate use of chlordiazepoxide in inpatient care?
- Short-term management of severe anxiety and alcohol withdrawal in monitored settings
- Long-term monotherapy for schizophrenia maintenance
- Primary treatment for bacterial meningitis
- As a first-line chemotherapy agent
Correct Answer: Short-term management of severe anxiety and alcohol withdrawal in monitored settings
Q40. Which regulatory or safety consideration is relevant for dispensing chlordiazepoxide?
- No special regulations because it’s an OTC vitamin
- Controlled prescription regulations due to risk of dependence
- Prohibited in all countries
- Only available as veterinary medicine
Correct Answer: Controlled prescription regulations due to risk of dependence
Q41. Which clinical test would not be useful in routine monitoring for a patient on chlordiazepoxide?
- Assessment of sedation and fall risk
- Periodic review of need and dose reduction plan
- Frequent liver biopsy
- Screening for misuse or polypharmacy interactions
Correct Answer: Frequent liver biopsy
Q42. A B.Pharm student asked how chlordiazepoxide enhances GABAergic transmission. The best brief answer is:
- It directly opens chloride channels without GABA
- It increases GABA-A receptor frequency of channel opening in presence of GABA
- It blocks GABA synthesis
- It binds to GABA and prevents its reuptake
Correct Answer: It increases GABA-A receptor frequency of channel opening in presence of GABA
Q43. Which patient instruction reduces the risk of daytime sedation when taking chlordiazepoxide?
- Take the entire daily dose at bedtime and avoid daytime dosing if possible
- Double the dose in the morning
- Avoid all sleep during treatment
- Take it with energy drinks to counteract sedation
Correct Answer: Take the entire daily dose at bedtime and avoid daytime dosing if possible
Q44. Which pharmacological property explains why some benzodiazepines are preferred in liver disease over chlordiazepoxide?
- They are entirely renally excreted unchanged
- They are metabolized to active long-lived metabolites
- They undergo direct conjugation to inactive metabolites (e.g., lorazepam, oxazepam)
- They are not absorbed from the GI tract
Correct Answer: They undergo direct conjugation to inactive metabolites (e.g., lorazepam, oxazepam)
Q45. Which sign suggests benzodiazepine dependence rather than occasional therapeutic use?
- Short-term prescribed use for situational anxiety
- Loss of control over dosing, craving, and continued use despite harm
- Improved function and adherence to prescription
- Absence of withdrawal on abrupt cessation
Correct Answer: Loss of control over dosing, craving, and continued use despite harm
Q46. In a patient with mixed benzodiazepine and alcohol overdose, which approach is appropriate?
- Immediate high-dose naloxone
- Supportive care, airway protection, and consider flumazenil only in select cases with no seizure risk
- Administer flumazenil to all patients without evaluation
- Give high-dose aspirin
Correct Answer: Supportive care, airway protection, and consider flumazenil only in select cases with no seizure risk
Q47. Which factor increases the likelihood of cognitive side effects with chlordiazepoxide?
- Low dose and short treatment duration
- Concurrent use of other CNS depressants and elderly age
- Strict avoidance of polypharmacy
- Administration by intramuscular route only
Correct Answer: Concurrent use of other CNS depressants and elderly age
Q48. For exam preparation, which study focus will best help B.Pharm students understand chlordiazepoxide toxicity?
- Mechanisms of GABA potentiation, symptoms of CNS depression, and management including flumazenil
- Only tablet color differences across brands
- Non-pharmacologic uses like aromatherapy
- Counting pills without understanding pharmacology
Correct Answer: Mechanisms of GABA potentiation, symptoms of CNS depression, and management including flumazenil
Q49. Which practical consideration is important when substituting chlordiazepoxide with another benzodiazepine?
- Ignore relative potency and half-life differences
- Consider equivalent dosing, potency, and half-life to avoid under- or overdosing
- Always double the dose of the new agent
- Substitute only with non-benzodiazepines
Correct Answer: Consider equivalent dosing, potency, and half-life to avoid under- or overdosing
Q50. Which teaching point about chlordiazepoxide storage and dispensing is correct for pharmacy practice?
- Store in a secure location, counsel on dependence risk, and dispense with clear duration limits
- Place next to candy in open display to improve compliance
- Never require prescription for dispensing
- Recommend crushing extended-release tablets for faster onset
Correct Answer: Store in a secure location, counsel on dependence risk, and dispense with clear duration limits
