NR 546 EXAM - ADVANCED
PSYCHOPHARMACOLOGY FOR THE
PMHNP QUESTIONS AND ANSWERS
(LATEST), (A+ GUARANTEE). JUST
RELEASED
1. A patient is being treated with Fluoxetine and exhibits significant clinical improvement but
experiences distressing insomnia. Which pharmacokinetic property of Fluoxetine explains its
tendency to cause activation and insomnia?
A. Its potent antagonism of H1 receptors
B. Its high affinity for the 5-HT2C receptor
C. Its long half-life and active metabolite Norfluoxetine
D. Its inhibition of the Norepinephrine Transporter (NET)
Answer: B
Conceptual Explanation: Fluoxetine has a unique profile among SSRIs due to its 5-HT2C
antagonism, which can lead to increased dopamine and norepinephrine release in the
prefrontal cortex, often manifesting as an energizing or activating effect
(insomnia/anxiety).
,2. Which of the following describes the mechanism of action of Vortioxetine (Trintellix)?
A. Multimodal antidepressant involving reuptake inhibition and several receptor
modulations (5-HT1A, 5-HT1B, 5-HT3, 5-HT7)
B. Selective Serotonin Reuptake Inhibitor and 5-HT1A partial agonist
C. Dual Serotonin and Norepinephrine reuptake inhibitor with D2 antagonism
D. Selective inhibitor of the Dopamine Transporter (DAT) and 5-HT2A antagonist
Answer: A
Conceptual Explanation: Vortioxetine is classified as a multimodal antidepressant
because it inhibits the serotonin transporter (SERT) while also acting as a 5-HT1A agonist,
5-HT1B partial agonist, and 5-HT3, 5-HT1D, and 5-HT7 antagonist.
3. When prescribing Clozapine, the provider must monitor the Absolute Neutrophil Count
(ANC). What is the minimum ANC level required to initiate Clozapine therapy in a non-benign
ethnic neutropenia (BEN) patient?
A. 500/mm³
B. 1000/mm³
C. 2000/mm³
D. 1500/mm³
Answer: D
, Conceptual Explanation: The FDA Clozapine REMS program requires a baseline ANC of at
least 1500/mm³ for the general population to start treatment due to the risk of severe
neutropenia.
4. A 45-year-old male with Schizophrenia presents with new-onset involuntary tongue
thrusting and facial grimacing after 10 years of Haloperidol use. Which mechanism is
primarily responsible for this condition?
A. Dopamine deficiency in the mesocortical pathway
B. Upregulation and supersensitivity of D2 receptors in the nigrostriatal pathway
C. Excessive serotonin activity in the basal ganglia
D. Acute blockade of muscarinic acetylcholine receptors
Answer: B
Conceptual Explanation: Tardive Dyskinesia (TD) is thought to result from the long-term
blockade of D2 receptors, leading to receptor upregulation and supersensitivity in the
nigrostriatal dopamine pathway.
5. Which Cytochrome P450 enzyme is primarily responsible for the metabolism of many
antipsychotics, and is inhibited by SSRIs like Paroxetine and Fluoxetine?
A. CYP1A2
B. CYP2C19
C. CYP3A4
PSYCHOPHARMACOLOGY FOR THE
PMHNP QUESTIONS AND ANSWERS
(LATEST), (A+ GUARANTEE). JUST
RELEASED
1. A patient is being treated with Fluoxetine and exhibits significant clinical improvement but
experiences distressing insomnia. Which pharmacokinetic property of Fluoxetine explains its
tendency to cause activation and insomnia?
A. Its potent antagonism of H1 receptors
B. Its high affinity for the 5-HT2C receptor
C. Its long half-life and active metabolite Norfluoxetine
D. Its inhibition of the Norepinephrine Transporter (NET)
Answer: B
Conceptual Explanation: Fluoxetine has a unique profile among SSRIs due to its 5-HT2C
antagonism, which can lead to increased dopamine and norepinephrine release in the
prefrontal cortex, often manifesting as an energizing or activating effect
(insomnia/anxiety).
,2. Which of the following describes the mechanism of action of Vortioxetine (Trintellix)?
A. Multimodal antidepressant involving reuptake inhibition and several receptor
modulations (5-HT1A, 5-HT1B, 5-HT3, 5-HT7)
B. Selective Serotonin Reuptake Inhibitor and 5-HT1A partial agonist
C. Dual Serotonin and Norepinephrine reuptake inhibitor with D2 antagonism
D. Selective inhibitor of the Dopamine Transporter (DAT) and 5-HT2A antagonist
Answer: A
Conceptual Explanation: Vortioxetine is classified as a multimodal antidepressant
because it inhibits the serotonin transporter (SERT) while also acting as a 5-HT1A agonist,
5-HT1B partial agonist, and 5-HT3, 5-HT1D, and 5-HT7 antagonist.
3. When prescribing Clozapine, the provider must monitor the Absolute Neutrophil Count
(ANC). What is the minimum ANC level required to initiate Clozapine therapy in a non-benign
ethnic neutropenia (BEN) patient?
A. 500/mm³
B. 1000/mm³
C. 2000/mm³
D. 1500/mm³
Answer: D
, Conceptual Explanation: The FDA Clozapine REMS program requires a baseline ANC of at
least 1500/mm³ for the general population to start treatment due to the risk of severe
neutropenia.
4. A 45-year-old male with Schizophrenia presents with new-onset involuntary tongue
thrusting and facial grimacing after 10 years of Haloperidol use. Which mechanism is
primarily responsible for this condition?
A. Dopamine deficiency in the mesocortical pathway
B. Upregulation and supersensitivity of D2 receptors in the nigrostriatal pathway
C. Excessive serotonin activity in the basal ganglia
D. Acute blockade of muscarinic acetylcholine receptors
Answer: B
Conceptual Explanation: Tardive Dyskinesia (TD) is thought to result from the long-term
blockade of D2 receptors, leading to receptor upregulation and supersensitivity in the
nigrostriatal dopamine pathway.
5. Which Cytochrome P450 enzyme is primarily responsible for the metabolism of many
antipsychotics, and is inhibited by SSRIs like Paroxetine and Fluoxetine?
A. CYP1A2
B. CYP2C19
C. CYP3A4
