NR 546 Exam 2 V2 | NR 546 Advanced
Psychopharmacology | Chamberlain | Q&A
with Rationale (Chamberlain NR546 Exam
2)
1. A 28-year-old female patient diagnosed with Bipolar I Disorder is being started on Lithium.
What is the most important clinical consideration regarding the therapeutic window of this
medication?
A. The therapeutic index is wide, allowing for flexible dosing.
B. Lithium does not require blood monitoring after the first month of treatment.
C. Serum levels must be monitored because the therapeutic window is narrow (0.6–1.2
mEq/L).
D. Levels should be drawn 2 hours after the morning dose for the most accurate reading.
Answer: C
Rationale: Lithium has a very narrow therapeutic index, meaning the difference between a
therapeutic dose and a toxic dose is small. Standard maintenance levels are typically
between 0.6 and 1.2 mEq/L. Levels above 1.5 mEq/L can lead to significant toxicity,
requiring urgent medical intervention.
,2. A patient taking Clozapine presents for a routine follow-up. Which laboratory value is the
most critical to monitor according to the Risk Evaluation and Mitigation Strategy (REMS)
program?
A. Hemoglobin A1c
B. Absolute Neutrophil Count (ANC)
C. Serum Potassium
D. Alanine Aminotransferase (ALT)
Answer: B
Rationale: Clozapine is associated with a risk of life-threatening agranulocytosis, which is
a severe decrease in white blood cell count. The REMS program mandates regular
monitoring of the Absolute Neutrophil Count (ANC) to ensure patient safety. If the ANC falls
below 1500/mm³, treatment must be adjusted or discontinued based on specific protocols.
3. Which mechanism of action explains why Second-Generation Antipsychotics (SGAs)
generally cause fewer Extrapyramidal Symptoms (EPS) than First-Generation Antipsychotics
(FGAs)?
A. Potent D2 receptor antagonism in the tuberoinfundibular pathway.
B. Selective blockade of Alpha-1 adrenergic receptors.
C. Complete inhibition of the nigrostriatal dopamine pathway.
D. 5-HT2A receptor antagonism combined with D2 receptor antagonism.
, Answer: D
Rationale: Second-Generation Antipsychotics (SGAs) utilize 5-HT2A antagonism to
modulate dopamine release in the nigrostriatal pathway. This serotonin-dopamine
antagonism reduces the intensity of D2 blockade compared to FGAs. Consequently, patients
experience a lower incidence of motor side effects like dystonia and akathisia.
4. A patient with Bipolar Disorder is prescribed Lamotrigine. The PMHNP must educate the
patient on the signs of which life-threatening condition?
A. Stevens-Johnson Syndrome (SJS)
B. Neuroleptic Malignant Syndrome (NMS)
C. Serotonin Syndrome
D. Agranulocytosis
Answer: A
Rationale: Lamotrigine carries a black box warning for severe, life-threatening rashes,
including Stevens-Johnson Syndrome (SJS). The risk is minimized by following a very slow
titration schedule when starting the medication. Patients must be instructed to report any
new skin rash or mucosal lesions immediately to their healthcare provider.
5. A 10-year-old child is diagnosed with ADHD, and the provider is considering
Methylphenidate. What is the primary mechanism of action for this stimulant?
A. It promotes the release of dopamine from presynaptic storage vesicles.
B. It acts as a selective Alpha-2A adrenergic receptor agonist.
Psychopharmacology | Chamberlain | Q&A
with Rationale (Chamberlain NR546 Exam
2)
1. A 28-year-old female patient diagnosed with Bipolar I Disorder is being started on Lithium.
What is the most important clinical consideration regarding the therapeutic window of this
medication?
A. The therapeutic index is wide, allowing for flexible dosing.
B. Lithium does not require blood monitoring after the first month of treatment.
C. Serum levels must be monitored because the therapeutic window is narrow (0.6–1.2
mEq/L).
D. Levels should be drawn 2 hours after the morning dose for the most accurate reading.
Answer: C
Rationale: Lithium has a very narrow therapeutic index, meaning the difference between a
therapeutic dose and a toxic dose is small. Standard maintenance levels are typically
between 0.6 and 1.2 mEq/L. Levels above 1.5 mEq/L can lead to significant toxicity,
requiring urgent medical intervention.
,2. A patient taking Clozapine presents for a routine follow-up. Which laboratory value is the
most critical to monitor according to the Risk Evaluation and Mitigation Strategy (REMS)
program?
A. Hemoglobin A1c
B. Absolute Neutrophil Count (ANC)
C. Serum Potassium
D. Alanine Aminotransferase (ALT)
Answer: B
Rationale: Clozapine is associated with a risk of life-threatening agranulocytosis, which is
a severe decrease in white blood cell count. The REMS program mandates regular
monitoring of the Absolute Neutrophil Count (ANC) to ensure patient safety. If the ANC falls
below 1500/mm³, treatment must be adjusted or discontinued based on specific protocols.
3. Which mechanism of action explains why Second-Generation Antipsychotics (SGAs)
generally cause fewer Extrapyramidal Symptoms (EPS) than First-Generation Antipsychotics
(FGAs)?
A. Potent D2 receptor antagonism in the tuberoinfundibular pathway.
B. Selective blockade of Alpha-1 adrenergic receptors.
C. Complete inhibition of the nigrostriatal dopamine pathway.
D. 5-HT2A receptor antagonism combined with D2 receptor antagonism.
, Answer: D
Rationale: Second-Generation Antipsychotics (SGAs) utilize 5-HT2A antagonism to
modulate dopamine release in the nigrostriatal pathway. This serotonin-dopamine
antagonism reduces the intensity of D2 blockade compared to FGAs. Consequently, patients
experience a lower incidence of motor side effects like dystonia and akathisia.
4. A patient with Bipolar Disorder is prescribed Lamotrigine. The PMHNP must educate the
patient on the signs of which life-threatening condition?
A. Stevens-Johnson Syndrome (SJS)
B. Neuroleptic Malignant Syndrome (NMS)
C. Serotonin Syndrome
D. Agranulocytosis
Answer: A
Rationale: Lamotrigine carries a black box warning for severe, life-threatening rashes,
including Stevens-Johnson Syndrome (SJS). The risk is minimized by following a very slow
titration schedule when starting the medication. Patients must be instructed to report any
new skin rash or mucosal lesions immediately to their healthcare provider.
5. A 10-year-old child is diagnosed with ADHD, and the provider is considering
Methylphenidate. What is the primary mechanism of action for this stimulant?
A. It promotes the release of dopamine from presynaptic storage vesicles.
B. It acts as a selective Alpha-2A adrenergic receptor agonist.
