NURS 5359 (Advanced Psychopharmacology) Exam 3
| Questions and Correct Answers plus Rationale | New
Update 2026-2027 | Graded A+
1. Which of the following best describes the primary mechanism of action of
benzodiazepines?
A) Direct agonism at GABA-A receptors
B) Positive allosteric modulation of GABA-A receptors
C) Inhibition of GABA transaminase
D) Blockade of glutamate receptors
Correct Answer: Positive allosteric modulation of GABA-A receptors
Rationale: Benzodiazepines bind to a specific site on the GABA-A receptor
complex and enhance the inhibitory effect of GABA, the primary inhibitory
neurotransmitter in the central nervous system. They do not directly activate the
receptor or inhibit GABA breakdown. This mechanism produces anxiolytic,
sedative, muscle relaxant, and anticonvulsant effects.
2. What is the primary clinical concern that must be ruled out before
prescribing a sedative-hypnotic for insomnia?
A) Restless legs syndrome
B) Narcolepsy
C) Obstructive sleep apnea
D) Circadian rhythm disorder
Correct Answer: Obstructive sleep apnea
Rationale: Obstructive sleep apnea is a critical condition that must be ruled out
before prescribing hypnotics because sedative-hypnotics can worsen airway
obstruction and increase the risk of respiratory depression. Restless legs
syndrome, narcolepsy, and circadian rhythm disorders are important but do not
carry the same immediate safety risk with hypnotic use.
, 3. Which benzodiazepine is most likely to cause severe withdrawal symptoms
if abruptly discontinued?
A) Diazepam
B) Clonazepam
C) Alprazolam
D) Lorazepam
Correct Answer: Alprazolam
Rationale: Alprazolam has a short half-life and high potency, leading to rapid
onset and severe withdrawal symptoms when abruptly discontinued. Longer-
acting benzodiazepines such as diazepam produce smoother, steadier effects with
less reinforcement and less severe withdrawal. This pharmacokinetic profile
makes alprazolam particularly prone to dependence.
4. What is the most important factor affecting the onset of action for
benzodiazepine medications?
A) Half-life
B) Absorption
C) Protein binding
D) Volume of distribution
Correct Answer: Absorption
Rationale: Absorption is the most important factor affecting how quickly a
benzodiazepine takes effect. Faster absorption leads to quicker onset of action.
While half-life, protein binding, and volume of distribution influence duration and
distribution, absorption is the primary determinant of onset.
5. Which medication is the specific antidote for benzodiazepine overdose?
A) Naloxone
B) Flumazenil
C) Protamine sulfate
D) Vitamin K
Correct Answer: Flumazenil
,Rationale: Flumazenil is a benzodiazepine receptor antagonist that rapidly
reverses the sedative effects of benzodiazepine overdose. It must be used with
caution as it can precipitate seizures in clients with benzodiazepine dependence
or mixed overdoses. Naloxone is for opioid overdose, and protamine sulfate
reverses heparin.
6. Which patient population should benzodiazepines be avoided in due to
teratogenic potential?
A) Older adults
B) Pregnant patients
C) Adolescents
D) Patients with renal impairment
Correct Answer: Pregnant patients
Rationale: Benzodiazepines should be avoided in pregnant patients due to
teratogenic effects, particularly during the first trimester. They can cause fetal
malformations and neonatal withdrawal symptoms. Older adults are at risk for
falls and cognitive impairment, but pregnancy represents the highest risk scenario
for benzodiazepine prescribing.
7. A patient taking buspirone asks how it differs from benzodiazepines. Which
response is most accurate?
A) Buspirone has no abuse potential and causes minimal sedation.
B) Buspirone works immediately for panic attacks.
C) Buspirone is a controlled substance.
D) Buspirone enhances GABA activity.
Correct Answer: Buspirone has no abuse potential and causes minimal sedation.
Rationale: Buspirone is a non-benzodiazepine anxiolytic that acts as a 5-HT1A
partial agonist. It has no abuse potential, does not cause significant sedation, and
is not a controlled substance. However, it requires 2 to 4 weeks for full effect and
is not effective for acute panic attacks.
8. Which receptor does buspirone primarily act on?
, A) GABA-A receptor
B) 5-HT1A receptor
C) Dopamine D2 receptor
D) Histamine H1 receptor
Correct Answer: 5-HT1A receptor
Rationale: Buspirone is a partial agonist at the 5-HT1A serotonin receptor. This
mechanism is distinct from benzodiazepines, which act on GABA-A receptors.
Buspirone's delayed onset and lack of sedation or dependence make it a favorable
option for generalized anxiety disorder.
9. Which medication is considered first-line pharmacologic treatment for
chronic insomnia?
A) Benzodiazepines
B) Z-drugs
C) Cognitive behavioral therapy for insomnia (CBT-I)
D) Melatonin
Correct Answer: Cognitive behavioral therapy for insomnia (CBT-I)
Rationale: CBT-I is the first-line treatment for chronic insomnia and includes
multiple core components: sleep hygiene, stimulus control, sleep restriction,
cognitive restructuring, and relaxation training. This multi-component approach is
more effective than any single intervention. Medications are considered
adjunctive or second-line.
10.Which of the following is a core component of cognitive behavioral therapy
for insomnia?
A) Sleep hygiene, stimulus control, and sleep restriction
B) Biofeedback and hypnosis
C) Light therapy and melatonin
D) Progressive muscle relaxation only
Correct Answer: Sleep hygiene, stimulus control, and sleep restriction
Rationale: CBT-I includes multiple core components: sleep hygiene, stimulus
control, sleep restriction, cognitive restructuring, and relaxation training. This
| Questions and Correct Answers plus Rationale | New
Update 2026-2027 | Graded A+
1. Which of the following best describes the primary mechanism of action of
benzodiazepines?
A) Direct agonism at GABA-A receptors
B) Positive allosteric modulation of GABA-A receptors
C) Inhibition of GABA transaminase
D) Blockade of glutamate receptors
Correct Answer: Positive allosteric modulation of GABA-A receptors
Rationale: Benzodiazepines bind to a specific site on the GABA-A receptor
complex and enhance the inhibitory effect of GABA, the primary inhibitory
neurotransmitter in the central nervous system. They do not directly activate the
receptor or inhibit GABA breakdown. This mechanism produces anxiolytic,
sedative, muscle relaxant, and anticonvulsant effects.
2. What is the primary clinical concern that must be ruled out before
prescribing a sedative-hypnotic for insomnia?
A) Restless legs syndrome
B) Narcolepsy
C) Obstructive sleep apnea
D) Circadian rhythm disorder
Correct Answer: Obstructive sleep apnea
Rationale: Obstructive sleep apnea is a critical condition that must be ruled out
before prescribing hypnotics because sedative-hypnotics can worsen airway
obstruction and increase the risk of respiratory depression. Restless legs
syndrome, narcolepsy, and circadian rhythm disorders are important but do not
carry the same immediate safety risk with hypnotic use.
, 3. Which benzodiazepine is most likely to cause severe withdrawal symptoms
if abruptly discontinued?
A) Diazepam
B) Clonazepam
C) Alprazolam
D) Lorazepam
Correct Answer: Alprazolam
Rationale: Alprazolam has a short half-life and high potency, leading to rapid
onset and severe withdrawal symptoms when abruptly discontinued. Longer-
acting benzodiazepines such as diazepam produce smoother, steadier effects with
less reinforcement and less severe withdrawal. This pharmacokinetic profile
makes alprazolam particularly prone to dependence.
4. What is the most important factor affecting the onset of action for
benzodiazepine medications?
A) Half-life
B) Absorption
C) Protein binding
D) Volume of distribution
Correct Answer: Absorption
Rationale: Absorption is the most important factor affecting how quickly a
benzodiazepine takes effect. Faster absorption leads to quicker onset of action.
While half-life, protein binding, and volume of distribution influence duration and
distribution, absorption is the primary determinant of onset.
5. Which medication is the specific antidote for benzodiazepine overdose?
A) Naloxone
B) Flumazenil
C) Protamine sulfate
D) Vitamin K
Correct Answer: Flumazenil
,Rationale: Flumazenil is a benzodiazepine receptor antagonist that rapidly
reverses the sedative effects of benzodiazepine overdose. It must be used with
caution as it can precipitate seizures in clients with benzodiazepine dependence
or mixed overdoses. Naloxone is for opioid overdose, and protamine sulfate
reverses heparin.
6. Which patient population should benzodiazepines be avoided in due to
teratogenic potential?
A) Older adults
B) Pregnant patients
C) Adolescents
D) Patients with renal impairment
Correct Answer: Pregnant patients
Rationale: Benzodiazepines should be avoided in pregnant patients due to
teratogenic effects, particularly during the first trimester. They can cause fetal
malformations and neonatal withdrawal symptoms. Older adults are at risk for
falls and cognitive impairment, but pregnancy represents the highest risk scenario
for benzodiazepine prescribing.
7. A patient taking buspirone asks how it differs from benzodiazepines. Which
response is most accurate?
A) Buspirone has no abuse potential and causes minimal sedation.
B) Buspirone works immediately for panic attacks.
C) Buspirone is a controlled substance.
D) Buspirone enhances GABA activity.
Correct Answer: Buspirone has no abuse potential and causes minimal sedation.
Rationale: Buspirone is a non-benzodiazepine anxiolytic that acts as a 5-HT1A
partial agonist. It has no abuse potential, does not cause significant sedation, and
is not a controlled substance. However, it requires 2 to 4 weeks for full effect and
is not effective for acute panic attacks.
8. Which receptor does buspirone primarily act on?
, A) GABA-A receptor
B) 5-HT1A receptor
C) Dopamine D2 receptor
D) Histamine H1 receptor
Correct Answer: 5-HT1A receptor
Rationale: Buspirone is a partial agonist at the 5-HT1A serotonin receptor. This
mechanism is distinct from benzodiazepines, which act on GABA-A receptors.
Buspirone's delayed onset and lack of sedation or dependence make it a favorable
option for generalized anxiety disorder.
9. Which medication is considered first-line pharmacologic treatment for
chronic insomnia?
A) Benzodiazepines
B) Z-drugs
C) Cognitive behavioral therapy for insomnia (CBT-I)
D) Melatonin
Correct Answer: Cognitive behavioral therapy for insomnia (CBT-I)
Rationale: CBT-I is the first-line treatment for chronic insomnia and includes
multiple core components: sleep hygiene, stimulus control, sleep restriction,
cognitive restructuring, and relaxation training. This multi-component approach is
more effective than any single intervention. Medications are considered
adjunctive or second-line.
10.Which of the following is a core component of cognitive behavioral therapy
for insomnia?
A) Sleep hygiene, stimulus control, and sleep restriction
B) Biofeedback and hypnosis
C) Light therapy and melatonin
D) Progressive muscle relaxation only
Correct Answer: Sleep hygiene, stimulus control, and sleep restriction
Rationale: CBT-I includes multiple core components: sleep hygiene, stimulus
control, sleep restriction, cognitive restructuring, and relaxation training. This
