NR 546 Exam 2 V3 | NR 546 Advanced
Psychopharmacology | Chamberlain | Q&A
with Rationale (Chamberlain NR546 Exam
2)
1. A patient with Bipolar I Disorder is being treated with Lithium. Which of the following
serum levels indicates a potentially toxic concentration that requires immediate
intervention?
A. 0.6 mEq/L
B. 1.8 mEq/L
C. 1.2 mEq/L
D. 0.9 mEq/L
Answer: B
Rationale: The therapeutic window for Lithium is narrow, typically ranging from 0.6 to 1.2
mEq/L for maintenance. Serum levels above 1.5 mEq/L are considered toxic and can lead
to severe gastrointestinal, neurological, and cardiac symptoms. Immediate medical
assessment and potential dose adjustment or discontinuation are necessary when levels
reach 1.8 mEq/L to prevent permanent organ damage.
,2. A 24-year-old female is prescribed Valproic Acid (Depakote) for mood stabilization. Which
laboratory test is most critical to monitor before and during treatment due to potential side
effects?
A. Blood Urea Nitrogen (BUN)
B. Serum Potassium
C. Liver Function Tests (LFTs)
D. Thyroid Stimulating Hormone (TSH)
Answer: C
Rationale: Valproic Acid carries a black box warning for hepatotoxicity, making LFT
monitoring essential for patient safety. It can also cause thrombocytopenia, necessitating a
complete blood count (CBC) to monitor platelet levels. Providers must remain vigilant for
signs of hepatic failure, especially within the first six months of initiating treatment.
3. When initiating Lamotrigine (Lamictal) for a patient with Bipolar Depression, why is it
essential to follow a slow titration schedule?
A. To avoid rapid onset of sedation
B. To prevent the development of Stevens-Johnson Syndrome (SJS)
C. To ensure the drug reaches therapeutic levels in the first 24 hours
D. To prevent sudden hypertensive crisis
Answer: B
,Rationale: Lamotrigine must be titrated slowly over several weeks to minimize the risk of
life-threatening dermatological reactions like Stevens-Johnson Syndrome. If a patient
misses doses for more than a few days, the titration schedule must usually be restarted
from the beginning. This cautious approach is a hallmark of safe prescribing practices for
this specific anticonvulsant mood stabilizer.
4. A patient reports taking Phenelzine (Nardil) and recently consumed aged cheese and red
wine. Which clinical presentation should the PMHNP be most concerned about?
A. Severe occipital headache and hypertensive crisis
B. Profound hypotension and bradycardia
C. Acute renal failure and oliguria
D. Respiratory depression and coma
Answer: A
Rationale: Phenelzine is a Monoamine Oxidase Inhibitor (MAOI) that interacts with dietary
tyramine found in aged cheeses and wines. This interaction prevents the breakdown of
tyramine, leading to a massive release of norepinephrine and a subsequent hypertensive
crisis. Patients on MAOIs must be strictly educated on a low-tyramine diet to avoid this
potentially fatal complication.
5. Which neurotransmitter is primarily targeted by Selective Serotonin Reuptake Inhibitors
(SSRIs) to alleviate symptoms of Depression?
A. Dopamine
, B. Serotonin (5-HT)
C. GABA
D. Norepinephrine
Answer: B
Rationale: SSRIs work by inhibiting the reuptake pump of the serotonin transporter
(SERT) in the synaptic cleft. This increases the concentration of serotonin available to bind
to post-synaptic receptors, which is hypothesized to improve mood and emotional
regulation. While other neurotransmitters may be indirectly affected, the primary
mechanism of action is specific to the serotonergic system.
6. A patient diagnosed with ADHD is starting Methylphenidate (Ritalin). What is the primary
mechanism of action for this stimulant medication?
A. Agonism at the Alpha-2 adrenergic receptors
B. Antagonism of NMDA receptors
C. Inhibition of the reuptake of Dopamine and Norepinephrine
D. Selective inhibition of Serotonin reuptake
Answer: C
Rationale: Stimulants like Methylphenidate function by blocking the reuptake of dopamine
(DAT) and norepinephrine (NET) in the prefrontal cortex. This increases the levels of these
catecholamines in the synapse, enhancing focus and reducing impulsivity. Unlike
Psychopharmacology | Chamberlain | Q&A
with Rationale (Chamberlain NR546 Exam
2)
1. A patient with Bipolar I Disorder is being treated with Lithium. Which of the following
serum levels indicates a potentially toxic concentration that requires immediate
intervention?
A. 0.6 mEq/L
B. 1.8 mEq/L
C. 1.2 mEq/L
D. 0.9 mEq/L
Answer: B
Rationale: The therapeutic window for Lithium is narrow, typically ranging from 0.6 to 1.2
mEq/L for maintenance. Serum levels above 1.5 mEq/L are considered toxic and can lead
to severe gastrointestinal, neurological, and cardiac symptoms. Immediate medical
assessment and potential dose adjustment or discontinuation are necessary when levels
reach 1.8 mEq/L to prevent permanent organ damage.
,2. A 24-year-old female is prescribed Valproic Acid (Depakote) for mood stabilization. Which
laboratory test is most critical to monitor before and during treatment due to potential side
effects?
A. Blood Urea Nitrogen (BUN)
B. Serum Potassium
C. Liver Function Tests (LFTs)
D. Thyroid Stimulating Hormone (TSH)
Answer: C
Rationale: Valproic Acid carries a black box warning for hepatotoxicity, making LFT
monitoring essential for patient safety. It can also cause thrombocytopenia, necessitating a
complete blood count (CBC) to monitor platelet levels. Providers must remain vigilant for
signs of hepatic failure, especially within the first six months of initiating treatment.
3. When initiating Lamotrigine (Lamictal) for a patient with Bipolar Depression, why is it
essential to follow a slow titration schedule?
A. To avoid rapid onset of sedation
B. To prevent the development of Stevens-Johnson Syndrome (SJS)
C. To ensure the drug reaches therapeutic levels in the first 24 hours
D. To prevent sudden hypertensive crisis
Answer: B
,Rationale: Lamotrigine must be titrated slowly over several weeks to minimize the risk of
life-threatening dermatological reactions like Stevens-Johnson Syndrome. If a patient
misses doses for more than a few days, the titration schedule must usually be restarted
from the beginning. This cautious approach is a hallmark of safe prescribing practices for
this specific anticonvulsant mood stabilizer.
4. A patient reports taking Phenelzine (Nardil) and recently consumed aged cheese and red
wine. Which clinical presentation should the PMHNP be most concerned about?
A. Severe occipital headache and hypertensive crisis
B. Profound hypotension and bradycardia
C. Acute renal failure and oliguria
D. Respiratory depression and coma
Answer: A
Rationale: Phenelzine is a Monoamine Oxidase Inhibitor (MAOI) that interacts with dietary
tyramine found in aged cheeses and wines. This interaction prevents the breakdown of
tyramine, leading to a massive release of norepinephrine and a subsequent hypertensive
crisis. Patients on MAOIs must be strictly educated on a low-tyramine diet to avoid this
potentially fatal complication.
5. Which neurotransmitter is primarily targeted by Selective Serotonin Reuptake Inhibitors
(SSRIs) to alleviate symptoms of Depression?
A. Dopamine
, B. Serotonin (5-HT)
C. GABA
D. Norepinephrine
Answer: B
Rationale: SSRIs work by inhibiting the reuptake pump of the serotonin transporter
(SERT) in the synaptic cleft. This increases the concentration of serotonin available to bind
to post-synaptic receptors, which is hypothesized to improve mood and emotional
regulation. While other neurotransmitters may be indirectly affected, the primary
mechanism of action is specific to the serotonergic system.
6. A patient diagnosed with ADHD is starting Methylphenidate (Ritalin). What is the primary
mechanism of action for this stimulant medication?
A. Agonism at the Alpha-2 adrenergic receptors
B. Antagonism of NMDA receptors
C. Inhibition of the reuptake of Dopamine and Norepinephrine
D. Selective inhibition of Serotonin reuptake
Answer: C
Rationale: Stimulants like Methylphenidate function by blocking the reuptake of dopamine
(DAT) and norepinephrine (NET) in the prefrontal cortex. This increases the levels of these
catecholamines in the synapse, enhancing focus and reducing impulsivity. Unlike
