ANCC PMHNP Board Exam Prep:
Practice Questions with Answers &
Detailed Rationales (2025/2026
Update)
Domain 1: Neurobiology & Psychopharmacology
Q1. Norepinephrine is a neurotransmitter implicated in alertness and
anxiety. What area of the brain has a large majority of norepinephrine
neurons?
A) Amygdala
B) Hippocampus
C) Locus Coeruleus
D) Nucleus Accumbens
Answer: C) Locus Coeruleus
Rationale: The locus coeruleus is the primary site of norepinephrine
synthesis in the brain. Along with the medullary reticular formation, it
produces the majority of norepinephrine neurons. The amygdala is
associated with fear processing, the hippocampus with memory, and the
nucleus accumbens with reward.
,Q2. Which cytochrome (CYP) enzyme is induced by tobacco use and
affects clozapine metabolism?
A) 1A2
B) 2D6
C) 2C9
D) 2C19
Answer: A) 1A2
Rationale: Tobacco smoke induces CYP1A2, increasing the metabolism of
clozapine. If a patient decreases or stops tobacco use, clozapine levels may
rise, requiring dose adjustment.
Q3. Which of the following lab findings would raise the greatest
concern when prescribing lithium?
A) BUN 20 mg/dL
B) GFR 115 mL/min
C) Serum Creatinine 3.0 mg/dL
D) Serum Na⁺ 120 mEq/L
Answer: C) Serum Creatinine 3.0 mg/dL
Rationale: Normal serum creatinine is <1.5 mg/dL. Elevated creatinine
indicates decreased renal function. Lithium is renally excreted, and impaired
renal function significantly increases the risk of lithium toxicity.
,Q4. A 43-year-old male treated for Bipolar I disorder on lithium
develops which hematologic change commonly associated with
lithium?
A) Agranulocytosis
B) Anemia
C) Leukocytosis
D) Leukopenia
Answer: C) Leukocytosis
Rationale: Lithium commonly causes benign, reversible leukocytosis
(elevated white blood cell count). Agranulocytosis and leukopenia are more
associated with clozapine.
Q5. A patient on clozapine reports smoking cessation. What is the
most appropriate next step?
A) Decrease clozapine dose
B) Increase clozapine dose
C) Add fluvoxamine
D) No change needed
Answer: A) Decrease clozapine dose
Rationale: Tobacco induces CYP1A2, increasing clozapine metabolism.
When smoking stops, clozapine levels rise, increasing toxicity risk. Dose
reduction is indicated.
, Q6. Which serotonin receptor is primarily targeted by atypical
antipsychotics for efficacy?
A) 5-HT₁A
B) 5-HT₂A
C) 5-HT₃
D) 5-HT₄
Answer: B) 5-HT₂A
Rationale: Atypical antipsychotics antagonize 5-HT₂A receptors, which
contributes to their efficacy in treating positive and negative symptoms of
schizophrenia with lower extrapyramidal side effect risk.
Q7. What is the mechanism of action of SSRIs?
A) Blockade of dopamine D₂ receptors
B) Inhibition of serotonin reuptake at the presynaptic terminal
C) Agonism at GABA-A receptors
D) Inhibition of monoamine oxidase
Answer: B) Inhibition of serotonin reuptake at the presynaptic terminal
Rationale: SSRIs selectively block the serotonin transporter (SERT),
increasing synaptic serotonin. MAOIs inhibit monoamine oxidase, and
antipsychotics block D₂ receptors.
Q8. Which medication is most associated with QTc prolongation and
requires baseline and follow-up EKGs?
Practice Questions with Answers &
Detailed Rationales (2025/2026
Update)
Domain 1: Neurobiology & Psychopharmacology
Q1. Norepinephrine is a neurotransmitter implicated in alertness and
anxiety. What area of the brain has a large majority of norepinephrine
neurons?
A) Amygdala
B) Hippocampus
C) Locus Coeruleus
D) Nucleus Accumbens
Answer: C) Locus Coeruleus
Rationale: The locus coeruleus is the primary site of norepinephrine
synthesis in the brain. Along with the medullary reticular formation, it
produces the majority of norepinephrine neurons. The amygdala is
associated with fear processing, the hippocampus with memory, and the
nucleus accumbens with reward.
,Q2. Which cytochrome (CYP) enzyme is induced by tobacco use and
affects clozapine metabolism?
A) 1A2
B) 2D6
C) 2C9
D) 2C19
Answer: A) 1A2
Rationale: Tobacco smoke induces CYP1A2, increasing the metabolism of
clozapine. If a patient decreases or stops tobacco use, clozapine levels may
rise, requiring dose adjustment.
Q3. Which of the following lab findings would raise the greatest
concern when prescribing lithium?
A) BUN 20 mg/dL
B) GFR 115 mL/min
C) Serum Creatinine 3.0 mg/dL
D) Serum Na⁺ 120 mEq/L
Answer: C) Serum Creatinine 3.0 mg/dL
Rationale: Normal serum creatinine is <1.5 mg/dL. Elevated creatinine
indicates decreased renal function. Lithium is renally excreted, and impaired
renal function significantly increases the risk of lithium toxicity.
,Q4. A 43-year-old male treated for Bipolar I disorder on lithium
develops which hematologic change commonly associated with
lithium?
A) Agranulocytosis
B) Anemia
C) Leukocytosis
D) Leukopenia
Answer: C) Leukocytosis
Rationale: Lithium commonly causes benign, reversible leukocytosis
(elevated white blood cell count). Agranulocytosis and leukopenia are more
associated with clozapine.
Q5. A patient on clozapine reports smoking cessation. What is the
most appropriate next step?
A) Decrease clozapine dose
B) Increase clozapine dose
C) Add fluvoxamine
D) No change needed
Answer: A) Decrease clozapine dose
Rationale: Tobacco induces CYP1A2, increasing clozapine metabolism.
When smoking stops, clozapine levels rise, increasing toxicity risk. Dose
reduction is indicated.
, Q6. Which serotonin receptor is primarily targeted by atypical
antipsychotics for efficacy?
A) 5-HT₁A
B) 5-HT₂A
C) 5-HT₃
D) 5-HT₄
Answer: B) 5-HT₂A
Rationale: Atypical antipsychotics antagonize 5-HT₂A receptors, which
contributes to their efficacy in treating positive and negative symptoms of
schizophrenia with lower extrapyramidal side effect risk.
Q7. What is the mechanism of action of SSRIs?
A) Blockade of dopamine D₂ receptors
B) Inhibition of serotonin reuptake at the presynaptic terminal
C) Agonism at GABA-A receptors
D) Inhibition of monoamine oxidase
Answer: B) Inhibition of serotonin reuptake at the presynaptic terminal
Rationale: SSRIs selectively block the serotonin transporter (SERT),
increasing synaptic serotonin. MAOIs inhibit monoamine oxidase, and
antipsychotics block D₂ receptors.
Q8. Which medication is most associated with QTc prolongation and
requires baseline and follow-up EKGs?
