NR546 /NR 546: Midterm Exam
-Psychopharmacology for the Psychiatric-Mental
Health Nurse Practitioner |
-Advanced Psychopharmacology
2026| 2027| 2028 Testing Cycle | Complete Guide
75 Questions With Answers & Expert Rationales
Guaranteed Pass | Graded A+ | Chamberlain
Q1: A 34-year-old patient with schizophrenia is prescribed an atypical antipsychotic. The
medication works primarily through antagonism at which receptor to reduce positive symptoms?
A. 5-HT1A
B. D2
C. GABA-A
D. NMDA
Correct Answer: B
Rationale: Correct because D2 receptor antagonism in the mesolimbic pathway is the primary
mechanism by which antipsychotics reduce positive symptoms such as hallucinations and
delusions. The mesolimbic pathway is hyperdopaminergic in schizophrenia, and blocking D2
receptors modulates this excess dopamine transmission. While 5-HT2A antagonism characterizes
atypical antipsychotics, the reduction of positive symptoms specifically requires D2 receptor
blockade.
,Q2: A 45-year-old patient on haloperidol for schizophrenia starts bupropion for smoking
cessation. Two weeks later, the patient develops severe rigidity, fever, and confusion. Which
metabolic interaction explains this presentation?
A. Bupropion inhibits CYP3A4, increasing haloperidol levels
B. Bupropion induces CYP2D6, decreasing haloperidol levels
C. Bupropion inhibits CYP1A2, increasing haloperidol levels
D. Bupropion inhibits CYP2D6, increasing haloperidol levels
Correct Answer: D
Rationale: Correct because bupropion is a potent CYP2D6 inhibitor, and haloperidol is a major
CYP2D6 substrate; this interaction significantly elevates haloperidol plasma concentrations. The
elevated haloperidol levels cause severe dopamine blockade, precipitating neuroleptic malignant
syndrome characterized by fever, rigidity, and altered mental status. CYP3A4 and CYP1A2 are
not the primary metabolic pathways involved in this specific drug-drug interaction.
Q3: A 28-year-old woman with major depressive disorder reports decreased libido and
anorgasmia since starting sertraline four weeks ago. Which neurotransmitter mechanism is
responsible for these adverse effects?
A. Increased synaptic serotonin via SERT inhibition
B. Increased synaptic norepinephrine via NET inhibition
C. Increased synaptic dopamine via DAT inhibition
D. Increased GABA activity via GABA-A modulation
Correct Answer: A
Rationale: Correct because SSRIs such as sertraline inhibit the serotonin transporter (SERT),
leading to increased synaptic serotonin levels that suppress sexual function through 5-HT2A
receptor activation in the spinal cord and hypothalamus. Serotonergic excess interferes with
dopamine-mediated sexual arousal and orgasm pathways, producing decreased libido and
anorgasmia. Norepinephrine and GABA mechanisms are not primarily responsible for SSRI-
induced sexual dysfunction.
,Q4: A 52-year-old patient on clozapine presents with fever, sore throat, and mouth ulcers.
Laboratory studies reveal an absolute neutrophil count of 850. What is the appropriate clinical
action?
A. Continue clozapine and monitor weekly
B. Stop clozapine immediately and monitor ANC
C. Reduce clozapine dose by 50% and recheck in one week
D. Start granulocyte colony-stimulating factor and continue clozapine
Correct Answer: B
Rationale: Correct because an ANC below 1000 mandates immediate discontinuation of
clozapine per the REMS program guidelines due to the risk of life-threatening agranulocytosis.
The patient must be monitored closely with frequent CBC differentials until the ANC recovers
above 1500, at which point rechallenging may be considered. Continuing or reducing the dose
places the patient at unacceptable risk for sepsis and infectious complications.
Q5: A researcher is studying a novel antidepressant that increases cyclic AMP (cAMP) through
activation of adenylyl cyclase. Which G-protein subtype mediates this effect?
A. Gi
B. Gq
C. Gs
D. Go
Correct Answer: C
Rationale: Correct because Gs proteins stimulate adenylyl cyclase, catalyzing the conversion of
ATP to cyclic AMP and activating downstream protein kinase A signaling. This second
messenger cascade is critical for antidepressant-induced neuroplasticity involving BDNF and
CREB phosphorylation. Gi proteins inhibit adenylyl cyclase, while Gq proteins activate
phospholipase C to generate IP3 and DAG.
, Q6: An 82-year-old patient with insomnia is prescribed a benzodiazepine. According to the
Beers Criteria, which agent is preferred in this geriatric population?
A. Diazepam
B. Lorazepam
C. Chlordiazepoxide
D. Clonazepam
Correct Answer: B
Rationale: Correct because lorazepam is a short-acting benzodiazepine with a relatively
straightforward metabolic pathway that avoids excessive accumulation in elderly patients with
reduced hepatic function. The Beers Criteria explicitly warn against long-acting agents such as
diazepam and chlordiazepoxide due to prolonged half-lives, increased fall risk, cognitive
impairment, and sedation in geriatric patients. Clonazepam, while useful for seizure disorders,
carries intermediate duration risks that make lorazepam preferable for acute anxiety or insomnia
in older adults.
Q7: A 16-year-old adolescent with major depressive disorder is started on fluoxetine. What is the
most critical monitoring requirement during the first two months of treatment?
A. Close observation for suicidal ideation and behavior
B. Weekly fasting glucose monitoring
C. Monthly liver function testing
D. Baseline and quarterly AIMS assessment
Correct Answer: A
Rationale: Correct because all antidepressants carry an FDA Black Box Warning for increased
suicidal ideation and behavior in children, adolescents, and young adults under 24 years of age
during initial treatment and dose adjustments. Close clinical observation, including weekly visits
and caregiver education, is mandatory to detect emergent suicidal thoughts. Fasting glucose, liver
function tests, and AIMS assessments are not standard initial monitoring requirements for
fluoxetine in adolescents.
-Psychopharmacology for the Psychiatric-Mental
Health Nurse Practitioner |
-Advanced Psychopharmacology
2026| 2027| 2028 Testing Cycle | Complete Guide
75 Questions With Answers & Expert Rationales
Guaranteed Pass | Graded A+ | Chamberlain
Q1: A 34-year-old patient with schizophrenia is prescribed an atypical antipsychotic. The
medication works primarily through antagonism at which receptor to reduce positive symptoms?
A. 5-HT1A
B. D2
C. GABA-A
D. NMDA
Correct Answer: B
Rationale: Correct because D2 receptor antagonism in the mesolimbic pathway is the primary
mechanism by which antipsychotics reduce positive symptoms such as hallucinations and
delusions. The mesolimbic pathway is hyperdopaminergic in schizophrenia, and blocking D2
receptors modulates this excess dopamine transmission. While 5-HT2A antagonism characterizes
atypical antipsychotics, the reduction of positive symptoms specifically requires D2 receptor
blockade.
,Q2: A 45-year-old patient on haloperidol for schizophrenia starts bupropion for smoking
cessation. Two weeks later, the patient develops severe rigidity, fever, and confusion. Which
metabolic interaction explains this presentation?
A. Bupropion inhibits CYP3A4, increasing haloperidol levels
B. Bupropion induces CYP2D6, decreasing haloperidol levels
C. Bupropion inhibits CYP1A2, increasing haloperidol levels
D. Bupropion inhibits CYP2D6, increasing haloperidol levels
Correct Answer: D
Rationale: Correct because bupropion is a potent CYP2D6 inhibitor, and haloperidol is a major
CYP2D6 substrate; this interaction significantly elevates haloperidol plasma concentrations. The
elevated haloperidol levels cause severe dopamine blockade, precipitating neuroleptic malignant
syndrome characterized by fever, rigidity, and altered mental status. CYP3A4 and CYP1A2 are
not the primary metabolic pathways involved in this specific drug-drug interaction.
Q3: A 28-year-old woman with major depressive disorder reports decreased libido and
anorgasmia since starting sertraline four weeks ago. Which neurotransmitter mechanism is
responsible for these adverse effects?
A. Increased synaptic serotonin via SERT inhibition
B. Increased synaptic norepinephrine via NET inhibition
C. Increased synaptic dopamine via DAT inhibition
D. Increased GABA activity via GABA-A modulation
Correct Answer: A
Rationale: Correct because SSRIs such as sertraline inhibit the serotonin transporter (SERT),
leading to increased synaptic serotonin levels that suppress sexual function through 5-HT2A
receptor activation in the spinal cord and hypothalamus. Serotonergic excess interferes with
dopamine-mediated sexual arousal and orgasm pathways, producing decreased libido and
anorgasmia. Norepinephrine and GABA mechanisms are not primarily responsible for SSRI-
induced sexual dysfunction.
,Q4: A 52-year-old patient on clozapine presents with fever, sore throat, and mouth ulcers.
Laboratory studies reveal an absolute neutrophil count of 850. What is the appropriate clinical
action?
A. Continue clozapine and monitor weekly
B. Stop clozapine immediately and monitor ANC
C. Reduce clozapine dose by 50% and recheck in one week
D. Start granulocyte colony-stimulating factor and continue clozapine
Correct Answer: B
Rationale: Correct because an ANC below 1000 mandates immediate discontinuation of
clozapine per the REMS program guidelines due to the risk of life-threatening agranulocytosis.
The patient must be monitored closely with frequent CBC differentials until the ANC recovers
above 1500, at which point rechallenging may be considered. Continuing or reducing the dose
places the patient at unacceptable risk for sepsis and infectious complications.
Q5: A researcher is studying a novel antidepressant that increases cyclic AMP (cAMP) through
activation of adenylyl cyclase. Which G-protein subtype mediates this effect?
A. Gi
B. Gq
C. Gs
D. Go
Correct Answer: C
Rationale: Correct because Gs proteins stimulate adenylyl cyclase, catalyzing the conversion of
ATP to cyclic AMP and activating downstream protein kinase A signaling. This second
messenger cascade is critical for antidepressant-induced neuroplasticity involving BDNF and
CREB phosphorylation. Gi proteins inhibit adenylyl cyclase, while Gq proteins activate
phospholipase C to generate IP3 and DAG.
, Q6: An 82-year-old patient with insomnia is prescribed a benzodiazepine. According to the
Beers Criteria, which agent is preferred in this geriatric population?
A. Diazepam
B. Lorazepam
C. Chlordiazepoxide
D. Clonazepam
Correct Answer: B
Rationale: Correct because lorazepam is a short-acting benzodiazepine with a relatively
straightforward metabolic pathway that avoids excessive accumulation in elderly patients with
reduced hepatic function. The Beers Criteria explicitly warn against long-acting agents such as
diazepam and chlordiazepoxide due to prolonged half-lives, increased fall risk, cognitive
impairment, and sedation in geriatric patients. Clonazepam, while useful for seizure disorders,
carries intermediate duration risks that make lorazepam preferable for acute anxiety or insomnia
in older adults.
Q7: A 16-year-old adolescent with major depressive disorder is started on fluoxetine. What is the
most critical monitoring requirement during the first two months of treatment?
A. Close observation for suicidal ideation and behavior
B. Weekly fasting glucose monitoring
C. Monthly liver function testing
D. Baseline and quarterly AIMS assessment
Correct Answer: A
Rationale: Correct because all antidepressants carry an FDA Black Box Warning for increased
suicidal ideation and behavior in children, adolescents, and young adults under 24 years of age
during initial treatment and dose adjustments. Close clinical observation, including weekly visits
and caregiver education, is mandatory to detect emergent suicidal thoughts. Fasting glucose, liver
function tests, and AIMS assessments are not standard initial monitoring requirements for
fluoxetine in adolescents.
