NR546 Week 8 Final Exam 2026 –Verified Questions &
Answers with Detailed Rationales | Advanced Pharmacology:
Psychopharmacology for the PMHNP | Chamberlain University
his study resource is built for PMHNP students preparing for the NR546 Week 8
Final Exam, Advanced Pharmacology: Psychopharmacology for the Psychiatric-
Mental Health Nurse Practitioner. It mirrors the style, difficulty, and topic
coverage of the Chamberlain University NR546 course assessments, covering
neuropharmacology foundations, pharmacokinetics, pharmacodynamics,
antidepressant pharmacology, antipsychotic medications, mood stabilizers,
anxiolytics, ADHD pharmacotherapy, substance use disorder treatment, and
special populations. The 300 unique MCQs include verified updated answers and
detailed rationales
1. A patient with long-standing hypertension develops left ventricular
hypertrophy. Which cellular adaptation best explains this change?
A) Hyperplasia
B) Hypertrophy
C) Metaplasia
D) Dysplasia
Explanation: Cardiac muscle cells cannot significantly divide after birth. In
response to increased workload caused by hypertension, existing myocardial cells
enlarge, resulting in hypertrophy rather than hyperplasia.
,2. A psychiatric medication undergoes extensive first-pass metabolism. The
clinical consequence is that:
A) The drug bypasses the liver entirely when taken orally
B) Only a fraction of the oral dose reaches systemic circulation, often
requiring higher oral than parenteral doses
C) All of the dose reaches the bloodstream unchanged after oral administration
D) The drug must always be given rectally to work
Explanation: Portal circulation delivers oral drugs directly to hepatic enzymes, so
first-pass metabolism degrades a portion before it reaches the blood, raising oral
dose requirements. The drug does not bypass the liver orally, full bioavailability is
false, and rectal dosing is not a general rule.
3. A client takes a new antidepressant with a half-life of 30 hours.
Approximately how long until steady-state plasma levels are reached?
A) About 5 to 7 days, since steady state requires roughly five half-lives
B) About 60 hours, since two half-lives suffice
C) About 30 minutes after the first dose
D) About 3 months regardless of half-life
Explanation: Steady state is achieved after approximately five half-lives, so five
times 30 hours equals 150 hours, about six days. Two half-lives, minutes, and
months all misapply the steady-state rule.
4. A client who smokes two packs daily takes a medication metabolized by
CYP1A2. After smoking cessation, the nurse anticipates that:
,A) Plasma levels will rise as the loss of CYP1A2 induction slows metabolism,
requiring dose reduction
B) Plasma levels will fall because smoking protects the drug
C) No change in levels occurs since smoking affects only the lungs
D) The drug must be switched to a parenteral form immediately
Explanation: Polycyclic aromatic hydrocarbons in smoke induce CYP1A2;
cessation removes the induction, slowing clearance and raising levels of drugs
such as olanzapine, clozapine, and theophylline. Smoking does not lower or ignore
drug levels, and the route is irrelevant.
5. A client with CYP2D6 poor metabolizer genotype takes nortriptyline and
develops marked side effects at a standard dose. The best explanation is:
A) The client has developed a sudden allergy to the medication
B) Poor metabolizers clear drugs faster than extensive metabolizers
C) Genotype has no influence on medication response
D) Reduced enzyme activity slows clearance, so the drug and its active
metabolites accumulate
Explanation: CYP2D6 poor metabolizers have significantly reduced enzyme
activity, leading to slower clearance and higher plasma concentrations of drugs
metabolized by this enzyme, increasing the risk of adverse effects.
6. A patient taking Lithium presents with coarse tremors, ataxia, and a
serum lithium level of 1.8 mEq/L. Which of the following is the most
appropriate next step?
, A) Hold the lithium dose and assess for toxicity symptoms
B) Increase fluid intake and maintain current dosage
C) Continue current dose and recheck level in one week
D) Provide a dose of Benztropine to manage the tremors
Explanation: Lithium levels between 1.5-2.0 mEq/L indicate mild to moderate
toxicity, characterized by coarse tremors and ataxia. The priority is to hold the
medication and assess the patient.
7. Which dopamine pathway is primarily responsible for the development of
extrapyramidal symptoms (EPS) when D2 receptors are blocked?
A) Mesolimbic pathway
B) Nigrostriatal pathway
C) Mesocortical pathway
D) Tuberoinfundibular pathway
Explanation: The nigrostriatal pathway controls motor function; blockade of D2
receptors here results in EPS. The mesolimbic relates to reward, mesocortical to
cognition/negative symptoms, and tuberoinfundibular to prolactin.
8. A client is prescribed Clozapine. Which Absolute Neutrophil Count (ANC)
result necessitates immediate discontinuation and prevents rechallenge?
A) ANC < 1500/mm³
B) ANC < 1000/mm³
C) ANC < 2000/mm³
D) ANC < 500/mm³
Answers with Detailed Rationales | Advanced Pharmacology:
Psychopharmacology for the PMHNP | Chamberlain University
his study resource is built for PMHNP students preparing for the NR546 Week 8
Final Exam, Advanced Pharmacology: Psychopharmacology for the Psychiatric-
Mental Health Nurse Practitioner. It mirrors the style, difficulty, and topic
coverage of the Chamberlain University NR546 course assessments, covering
neuropharmacology foundations, pharmacokinetics, pharmacodynamics,
antidepressant pharmacology, antipsychotic medications, mood stabilizers,
anxiolytics, ADHD pharmacotherapy, substance use disorder treatment, and
special populations. The 300 unique MCQs include verified updated answers and
detailed rationales
1. A patient with long-standing hypertension develops left ventricular
hypertrophy. Which cellular adaptation best explains this change?
A) Hyperplasia
B) Hypertrophy
C) Metaplasia
D) Dysplasia
Explanation: Cardiac muscle cells cannot significantly divide after birth. In
response to increased workload caused by hypertension, existing myocardial cells
enlarge, resulting in hypertrophy rather than hyperplasia.
,2. A psychiatric medication undergoes extensive first-pass metabolism. The
clinical consequence is that:
A) The drug bypasses the liver entirely when taken orally
B) Only a fraction of the oral dose reaches systemic circulation, often
requiring higher oral than parenteral doses
C) All of the dose reaches the bloodstream unchanged after oral administration
D) The drug must always be given rectally to work
Explanation: Portal circulation delivers oral drugs directly to hepatic enzymes, so
first-pass metabolism degrades a portion before it reaches the blood, raising oral
dose requirements. The drug does not bypass the liver orally, full bioavailability is
false, and rectal dosing is not a general rule.
3. A client takes a new antidepressant with a half-life of 30 hours.
Approximately how long until steady-state plasma levels are reached?
A) About 5 to 7 days, since steady state requires roughly five half-lives
B) About 60 hours, since two half-lives suffice
C) About 30 minutes after the first dose
D) About 3 months regardless of half-life
Explanation: Steady state is achieved after approximately five half-lives, so five
times 30 hours equals 150 hours, about six days. Two half-lives, minutes, and
months all misapply the steady-state rule.
4. A client who smokes two packs daily takes a medication metabolized by
CYP1A2. After smoking cessation, the nurse anticipates that:
,A) Plasma levels will rise as the loss of CYP1A2 induction slows metabolism,
requiring dose reduction
B) Plasma levels will fall because smoking protects the drug
C) No change in levels occurs since smoking affects only the lungs
D) The drug must be switched to a parenteral form immediately
Explanation: Polycyclic aromatic hydrocarbons in smoke induce CYP1A2;
cessation removes the induction, slowing clearance and raising levels of drugs
such as olanzapine, clozapine, and theophylline. Smoking does not lower or ignore
drug levels, and the route is irrelevant.
5. A client with CYP2D6 poor metabolizer genotype takes nortriptyline and
develops marked side effects at a standard dose. The best explanation is:
A) The client has developed a sudden allergy to the medication
B) Poor metabolizers clear drugs faster than extensive metabolizers
C) Genotype has no influence on medication response
D) Reduced enzyme activity slows clearance, so the drug and its active
metabolites accumulate
Explanation: CYP2D6 poor metabolizers have significantly reduced enzyme
activity, leading to slower clearance and higher plasma concentrations of drugs
metabolized by this enzyme, increasing the risk of adverse effects.
6. A patient taking Lithium presents with coarse tremors, ataxia, and a
serum lithium level of 1.8 mEq/L. Which of the following is the most
appropriate next step?
, A) Hold the lithium dose and assess for toxicity symptoms
B) Increase fluid intake and maintain current dosage
C) Continue current dose and recheck level in one week
D) Provide a dose of Benztropine to manage the tremors
Explanation: Lithium levels between 1.5-2.0 mEq/L indicate mild to moderate
toxicity, characterized by coarse tremors and ataxia. The priority is to hold the
medication and assess the patient.
7. Which dopamine pathway is primarily responsible for the development of
extrapyramidal symptoms (EPS) when D2 receptors are blocked?
A) Mesolimbic pathway
B) Nigrostriatal pathway
C) Mesocortical pathway
D) Tuberoinfundibular pathway
Explanation: The nigrostriatal pathway controls motor function; blockade of D2
receptors here results in EPS. The mesolimbic relates to reward, mesocortical to
cognition/negative symptoms, and tuberoinfundibular to prolactin.
8. A client is prescribed Clozapine. Which Absolute Neutrophil Count (ANC)
result necessitates immediate discontinuation and prevents rechallenge?
A) ANC < 1500/mm³
B) ANC < 1000/mm³
C) ANC < 2000/mm³
D) ANC < 500/mm³
