NR 546 Advanced Pharmacology
Psychopharmacology for the PMHNP Week 4
Midterm Exam 2026/2027 – Questions and
Answers | 100% Verified | Detailed Rationales –
Pass Guaranteed – A+ Graded
1. Which of the following best describes the mechanism of action for Selective
Serotonin Reuptake Inhibitors (SSRIs)?
A. Antagonism of serotonin 5-HT2A receptors
B. Inhibition of the serotonin transporter protein (SERT)
C. Inhibition of monoamine oxidase enzymes
D. Direct agonism of serotonin 5-HT1A receptors
Correct Answer: B. Inhibition of the serotonin transporter protein (SERT)
Rationale: SSRIs work by blocking the serotonin transporter (SERT), which is
responsible for the reuptake of serotonin from the synaptic cleft back into the
presynaptic neuron. This blockade increases the concentration of serotonin
available in the synapse to bind to postsynaptic receptors, which is thought to
underlie their therapeutic effect. Choice A describes atypical antipsychotics, C
describes MAOIs, and D describes buspirone.
2. A patient on an SSRI for 10 days reports feeling no improvement in their
depressive symptoms. What is the most appropriate action by the PMHNP?
A. Immediately switch to a different class of antidepressant.
B. Augment the SSRI with a low-dose antipsychotic.
C. Educate the patient that the full therapeutic effect may take 4-8 weeks.
D. Discontinue the SSRI as it is not working.
Correct Answer: C. Educate the patient that the full therapeutic effect may
take 4-8 weeks.
Rationale: The onset of therapeutic action for SSRIs and other antidepressants
,typically requires 2-4 weeks for an initial response and 6-8 weeks for a full
response. It is crucial for the PMHNP to manage patient expectations and provide
psychoeducation about this delayed onset before considering a change in therapy.
Choices A, B, and D are premature at this stage.
3. Which of the following medications is most associated with the side effect of
sexual dysfunction?
A. Bupropion
B. Mirtazapine
C. Sertraline
D. Vortioxetine
Correct Answer: C. Sertraline
Rationale: SSRIs, including sertraline, are well-known for causing sexual
dysfunction, including decreased libido, delayed ejaculation, and anorgasmia, due
to their serotonergic effects. Bupropion (A) is often used to counteract this side
effect. Mirtazapine (B) has a lower incidence, and vortioxetine (D) was designed to
have a lower rate of sexual side effects.
4. What is a Black Box Warning associated with all antidepressants?
A. Risk of tardive dyskinesia
B. Risk of suicidal thoughts and behaviors in patients under 25
C. Risk of severe hypertension
D. Risk of agranulocytosis
Correct Answer: B. Risk of suicidal thoughts and behaviors in patients under
25
Rationale: The FDA has issued a Black Box Warning for all antidepressants
regarding an increased risk of suicidal thinking and behavior in children,
adolescents, and young adults (up to age 24) during the initial phase of treatment.
This necessitates close monitoring. TD (A) is associated with antipsychotics,
hypertension (C) with MAOIs and SNRIs, and agranulocytosis (D) with clozapine.
5. A patient presents with symptoms of depression and reports significant
fatigue and hypersomnia. Which antidepressant might be a particularly good
,choice to help with these specific symptoms?
A. Fluoxetine
B. Paroxetine
C. Bupropion
D. Sertraline
Correct Answer: C. Bupropion
Rationale: Bupropion is an NDRI (norepinephrine-dopamine reuptake
inhibitor) that tends to be more activating. It is often a good choice for patients
whose depression is characterized by prominent fatigue, hypersomnia, and
psychomotor retardation. In contrast, SSRIs like fluoxetine, paroxetine, and
sertraline can sometimes worsen insomnia and fatigue, especially early in
treatment.
6. Which of the following is a potentially life-threatening adverse effect of
Monoamine Oxidase Inhibitors (MAOIs) that requires a tyramine-restricted diet?
A. Serotonin syndrome
B. Hypertensive crisis
C. Neuroleptic malignant syndrome
D. Agranulocytosis
Correct Answer: B. Hypertensive crisis
Rationale: MAOIs inhibit the breakdown of tyramine, a substance found in
aged cheeses, cured meats, and fermented products. Consuming high-tyramine
foods while on an MAOI can lead to a massive release of norepinephrine, causing
a hypertensive crisis. This is a classic and critical patient teaching point.
7. A patient on an MAOI is prescribed a new medication. Which of the following
would be contraindicated?
A. Acetaminophen
B. Lisinopril
C. Pseudoephedrine
D. Omeprazole
, Correct Answer: C. Pseudoephedrine
Rationale: Pseudoephedrine is a sympathomimetic amine that causes the
release of norepinephrine. When combined with an MAOI, it can precipitate a
hypertensive crisis. All sympathomimetic drugs (e.g., decongestants,
amphetamines) are contraindicated with MAOIs.
8. What is the primary mechanism of action of benzodiazepines?
A. They increase the release of GABA.
B. They are direct agonists at GABA-A receptors.
C. They increase the frequency of chloride channel opening at the GABA-A
receptor.
D. They inhibit the reuptake of GABA.
Correct Answer: C. They increase the frequency of chloride channel opening
at the GABA-A receptor.
Rationale: Benzodiazepines bind to a specific site on the GABA-A receptor
complex and act as positive allosteric modulators. They increase the frequency of
chloride channel opening in the presence of GABA, enhancing the inhibitory effect
of the neurotransmitter. Barbiturates, in contrast, increase the duration of channel
opening.
9. Which benzodiazepine is preferred for a patient with significant liver
impairment?
A. Diazepam
B. Chlordiazepoxide
C. Lorazepam
D. Clorazepate
Correct Answer: C. Lorazepam
Rationale: Lorazepam, along with oxazepam and temazepam, undergoes
glucuronidation, a phase II metabolic process that is less affected by hepatic
impairment or advanced age. The other benzodiazepines listed (A, B, D) undergo
phase I metabolism (cytochrome P450 oxidation), producing active metabolites
that can accumulate and cause prolonged sedation in patients with liver disease.
Psychopharmacology for the PMHNP Week 4
Midterm Exam 2026/2027 – Questions and
Answers | 100% Verified | Detailed Rationales –
Pass Guaranteed – A+ Graded
1. Which of the following best describes the mechanism of action for Selective
Serotonin Reuptake Inhibitors (SSRIs)?
A. Antagonism of serotonin 5-HT2A receptors
B. Inhibition of the serotonin transporter protein (SERT)
C. Inhibition of monoamine oxidase enzymes
D. Direct agonism of serotonin 5-HT1A receptors
Correct Answer: B. Inhibition of the serotonin transporter protein (SERT)
Rationale: SSRIs work by blocking the serotonin transporter (SERT), which is
responsible for the reuptake of serotonin from the synaptic cleft back into the
presynaptic neuron. This blockade increases the concentration of serotonin
available in the synapse to bind to postsynaptic receptors, which is thought to
underlie their therapeutic effect. Choice A describes atypical antipsychotics, C
describes MAOIs, and D describes buspirone.
2. A patient on an SSRI for 10 days reports feeling no improvement in their
depressive symptoms. What is the most appropriate action by the PMHNP?
A. Immediately switch to a different class of antidepressant.
B. Augment the SSRI with a low-dose antipsychotic.
C. Educate the patient that the full therapeutic effect may take 4-8 weeks.
D. Discontinue the SSRI as it is not working.
Correct Answer: C. Educate the patient that the full therapeutic effect may
take 4-8 weeks.
Rationale: The onset of therapeutic action for SSRIs and other antidepressants
,typically requires 2-4 weeks for an initial response and 6-8 weeks for a full
response. It is crucial for the PMHNP to manage patient expectations and provide
psychoeducation about this delayed onset before considering a change in therapy.
Choices A, B, and D are premature at this stage.
3. Which of the following medications is most associated with the side effect of
sexual dysfunction?
A. Bupropion
B. Mirtazapine
C. Sertraline
D. Vortioxetine
Correct Answer: C. Sertraline
Rationale: SSRIs, including sertraline, are well-known for causing sexual
dysfunction, including decreased libido, delayed ejaculation, and anorgasmia, due
to their serotonergic effects. Bupropion (A) is often used to counteract this side
effect. Mirtazapine (B) has a lower incidence, and vortioxetine (D) was designed to
have a lower rate of sexual side effects.
4. What is a Black Box Warning associated with all antidepressants?
A. Risk of tardive dyskinesia
B. Risk of suicidal thoughts and behaviors in patients under 25
C. Risk of severe hypertension
D. Risk of agranulocytosis
Correct Answer: B. Risk of suicidal thoughts and behaviors in patients under
25
Rationale: The FDA has issued a Black Box Warning for all antidepressants
regarding an increased risk of suicidal thinking and behavior in children,
adolescents, and young adults (up to age 24) during the initial phase of treatment.
This necessitates close monitoring. TD (A) is associated with antipsychotics,
hypertension (C) with MAOIs and SNRIs, and agranulocytosis (D) with clozapine.
5. A patient presents with symptoms of depression and reports significant
fatigue and hypersomnia. Which antidepressant might be a particularly good
,choice to help with these specific symptoms?
A. Fluoxetine
B. Paroxetine
C. Bupropion
D. Sertraline
Correct Answer: C. Bupropion
Rationale: Bupropion is an NDRI (norepinephrine-dopamine reuptake
inhibitor) that tends to be more activating. It is often a good choice for patients
whose depression is characterized by prominent fatigue, hypersomnia, and
psychomotor retardation. In contrast, SSRIs like fluoxetine, paroxetine, and
sertraline can sometimes worsen insomnia and fatigue, especially early in
treatment.
6. Which of the following is a potentially life-threatening adverse effect of
Monoamine Oxidase Inhibitors (MAOIs) that requires a tyramine-restricted diet?
A. Serotonin syndrome
B. Hypertensive crisis
C. Neuroleptic malignant syndrome
D. Agranulocytosis
Correct Answer: B. Hypertensive crisis
Rationale: MAOIs inhibit the breakdown of tyramine, a substance found in
aged cheeses, cured meats, and fermented products. Consuming high-tyramine
foods while on an MAOI can lead to a massive release of norepinephrine, causing
a hypertensive crisis. This is a classic and critical patient teaching point.
7. A patient on an MAOI is prescribed a new medication. Which of the following
would be contraindicated?
A. Acetaminophen
B. Lisinopril
C. Pseudoephedrine
D. Omeprazole
, Correct Answer: C. Pseudoephedrine
Rationale: Pseudoephedrine is a sympathomimetic amine that causes the
release of norepinephrine. When combined with an MAOI, it can precipitate a
hypertensive crisis. All sympathomimetic drugs (e.g., decongestants,
amphetamines) are contraindicated with MAOIs.
8. What is the primary mechanism of action of benzodiazepines?
A. They increase the release of GABA.
B. They are direct agonists at GABA-A receptors.
C. They increase the frequency of chloride channel opening at the GABA-A
receptor.
D. They inhibit the reuptake of GABA.
Correct Answer: C. They increase the frequency of chloride channel opening
at the GABA-A receptor.
Rationale: Benzodiazepines bind to a specific site on the GABA-A receptor
complex and act as positive allosteric modulators. They increase the frequency of
chloride channel opening in the presence of GABA, enhancing the inhibitory effect
of the neurotransmitter. Barbiturates, in contrast, increase the duration of channel
opening.
9. Which benzodiazepine is preferred for a patient with significant liver
impairment?
A. Diazepam
B. Chlordiazepoxide
C. Lorazepam
D. Clorazepate
Correct Answer: C. Lorazepam
Rationale: Lorazepam, along with oxazepam and temazepam, undergoes
glucuronidation, a phase II metabolic process that is less affected by hepatic
impairment or advanced age. The other benzodiazepines listed (A, B, D) undergo
phase I metabolism (cytochrome P450 oxidation), producing active metabolites
that can accumulate and cause prolonged sedation in patients with liver disease.
