NU 643 Final Exam V1 | NU 643 Advanced
Psychopharmacology | Actual Q&A with Rationale
(NU643 Final Exam) | Regis University
1. A 24-year-old male is diagnosed with Schizophrenia. According to the Dopamine
Hypothesis, which pathway is associated with the positive symptoms like hallucinations and
delusions?
A. Mesocortical pathway
B. Mesolimbic pathway
C. Nigrostriatal pathway
D. Tuberoinfundibular pathway
Correct Answer: B
Explanation: The mesolimbic pathway is primarily responsible for the positive symptoms
of schizophrenia due to an overabundance of dopamine. Antipsychotics work by blocking
D2 receptors in this specific tract to alleviate these symptoms. Understanding these
pathways helps providers predict both the therapeutic and adverse effects of dopaminergic
medications.
2. When prescribing Clozapine (Clozaril), which laboratory parameter must be monitored via
the REMS program to prevent life-threatening complications?
A. Liver Function Tests (LFTs)
B. Blood Urea Nitrogen (BUN)
,C. Thyroid Stimulating Hormone (TSH)
D. Absolute Neutrophil Count (ANC)
Correct Answer: D
Explanation: Clozapine carries a high risk for severe neutropenia, which can lead to fatal
infections if not caught early. The Risk Evaluation and Mitigation Strategy (REMS) requires
regular Absolute Neutrophil Count monitoring for all patients. If the ANC falls below a
specific threshold, the medication must be discontinued immediately to protect the patient.
3. A patient taking Lithium for Bipolar I Disorder presents with coarse tremors, ataxia, and
confusion. What is the most likely cause of these symptoms?
A. Serotonin Syndrome
B. Extrapyramidal Side Effects
C. Lithium toxicity
D. Neuroleptic Malignant Syndrome
Correct Answer: C
Explanation: Lithium has a very narrow therapeutic index, and levels above 1.5 mEq/L are
generally considered toxic. Symptoms such as coarse tremors, mental status changes, and
ataxia are hallmarks of moderate to severe lithium poisoning. Immediate serum level
testing and hydration are required to manage this potentially lethal condition.
,4. Which mechanism of action is primarily responsible for the efficacy of Selective Serotonin
Reuptake Inhibitors (SSRIs) in treating depression?
A. Inhibition of Monoamine Oxidase
B. Blockade of the 5-HT transporter (SERT)
C. Antagonism of D2 receptors
D. Stimulation of GABA-A receptors
Correct Answer: B
Explanation: SSRIs work by inhibiting the SERT transporter, which prevents the reuptake
of serotonin into the presynaptic neuron. This increases the availability of serotonin in the
synaptic cleft, leading to improved mood and emotional regulation over time. It typically
takes 4 to 6 weeks for full therapeutic effects to be observed in clinical practice.
5. A patient with a history of seizures requires an antidepressant. Which of the following
medications is contraindicated due to its potential to lower the seizure threshold?
A. Fluoxetine
B. Sertraline
C. Bupropion
D. Escitalopram
Correct Answer: C
, Explanation: Bupropion is known to significantly lower the seizure threshold, especially at
higher doses or in patients with eating disorders. It is absolutely contraindicated in
individuals with a history of epilepsy or bulimia/anorexia. Clinicians must screen for these
conditions before initiating treatment to ensure patient safety.
6. Which antipsychotic medication is most strongly associated with significant weight gain
and metabolic syndrome?
A. Ziprasidone
B. Aripiprazole
C. Olanzapine
D. Lurasidone
Correct Answer: C
Explanation: Olanzapine (Zyprexa) is one of the second-generation antipsychotics with the
highest risk for weight gain, dyslipidemia, and glucose intolerance. Monitoring of BMI,
fasting glucose, and lipid profiles is essential during the course of treatment. This metabolic
profile often necessitates a switch to weight-neutral options like Aripiprazole or
Ziprasidone.
7. A patient is prescribed Lamotrigine (Lamictal) for Bipolar II depression. Why is it crucial to
use a very slow dose titration?
A. To prevent gastrointestinal upset
B. To avoid rapid mood switching into mania
Psychopharmacology | Actual Q&A with Rationale
(NU643 Final Exam) | Regis University
1. A 24-year-old male is diagnosed with Schizophrenia. According to the Dopamine
Hypothesis, which pathway is associated with the positive symptoms like hallucinations and
delusions?
A. Mesocortical pathway
B. Mesolimbic pathway
C. Nigrostriatal pathway
D. Tuberoinfundibular pathway
Correct Answer: B
Explanation: The mesolimbic pathway is primarily responsible for the positive symptoms
of schizophrenia due to an overabundance of dopamine. Antipsychotics work by blocking
D2 receptors in this specific tract to alleviate these symptoms. Understanding these
pathways helps providers predict both the therapeutic and adverse effects of dopaminergic
medications.
2. When prescribing Clozapine (Clozaril), which laboratory parameter must be monitored via
the REMS program to prevent life-threatening complications?
A. Liver Function Tests (LFTs)
B. Blood Urea Nitrogen (BUN)
,C. Thyroid Stimulating Hormone (TSH)
D. Absolute Neutrophil Count (ANC)
Correct Answer: D
Explanation: Clozapine carries a high risk for severe neutropenia, which can lead to fatal
infections if not caught early. The Risk Evaluation and Mitigation Strategy (REMS) requires
regular Absolute Neutrophil Count monitoring for all patients. If the ANC falls below a
specific threshold, the medication must be discontinued immediately to protect the patient.
3. A patient taking Lithium for Bipolar I Disorder presents with coarse tremors, ataxia, and
confusion. What is the most likely cause of these symptoms?
A. Serotonin Syndrome
B. Extrapyramidal Side Effects
C. Lithium toxicity
D. Neuroleptic Malignant Syndrome
Correct Answer: C
Explanation: Lithium has a very narrow therapeutic index, and levels above 1.5 mEq/L are
generally considered toxic. Symptoms such as coarse tremors, mental status changes, and
ataxia are hallmarks of moderate to severe lithium poisoning. Immediate serum level
testing and hydration are required to manage this potentially lethal condition.
,4. Which mechanism of action is primarily responsible for the efficacy of Selective Serotonin
Reuptake Inhibitors (SSRIs) in treating depression?
A. Inhibition of Monoamine Oxidase
B. Blockade of the 5-HT transporter (SERT)
C. Antagonism of D2 receptors
D. Stimulation of GABA-A receptors
Correct Answer: B
Explanation: SSRIs work by inhibiting the SERT transporter, which prevents the reuptake
of serotonin into the presynaptic neuron. This increases the availability of serotonin in the
synaptic cleft, leading to improved mood and emotional regulation over time. It typically
takes 4 to 6 weeks for full therapeutic effects to be observed in clinical practice.
5. A patient with a history of seizures requires an antidepressant. Which of the following
medications is contraindicated due to its potential to lower the seizure threshold?
A. Fluoxetine
B. Sertraline
C. Bupropion
D. Escitalopram
Correct Answer: C
, Explanation: Bupropion is known to significantly lower the seizure threshold, especially at
higher doses or in patients with eating disorders. It is absolutely contraindicated in
individuals with a history of epilepsy or bulimia/anorexia. Clinicians must screen for these
conditions before initiating treatment to ensure patient safety.
6. Which antipsychotic medication is most strongly associated with significant weight gain
and metabolic syndrome?
A. Ziprasidone
B. Aripiprazole
C. Olanzapine
D. Lurasidone
Correct Answer: C
Explanation: Olanzapine (Zyprexa) is one of the second-generation antipsychotics with the
highest risk for weight gain, dyslipidemia, and glucose intolerance. Monitoring of BMI,
fasting glucose, and lipid profiles is essential during the course of treatment. This metabolic
profile often necessitates a switch to weight-neutral options like Aripiprazole or
Ziprasidone.
7. A patient is prescribed Lamotrigine (Lamictal) for Bipolar II depression. Why is it crucial to
use a very slow dose titration?
A. To prevent gastrointestinal upset
B. To avoid rapid mood switching into mania
