Comprehensive PMHNP Board Certification
Practice Examination: 150 High-Yield
Multiple-Choice Questions with Evidence-
Based Rationales Covering
Psychopharmacology, Neurobiology,
Differential Diagnosis, Psychotherapy, Ethics,
and Advanced Clinical Decision-Making for
Psychiatric-Mental Health Nurse Practitioner
Certification a well detailed one
written and graded A+ upgraded
Instructions
Select the single best answer for each question. Each question is designed to test
advanced clinical knowledge, diagnostic reasoning, and evidence-based practice at the
level expected for PMHNP board certification.
,Section 1: Psychopharmacology (Questions 1–30)
1. A 45-year-old patient with major depressive disorder has been taking fluoxetine
40 mg daily for 8 weeks with partial response. The PMHNP decides to augment
with aripiprazole. Which receptor profile makes aripiprazole uniquely suited as an
adjunctive agent in depression?
A. High-affinity 5-HT2A antagonism with mild D2 antagonism
B. Partial agonism at D2 and 5-HT1A receptors with 5-HT2A antagonism
C. Selective norepinephrine reuptake inhibition with 5-HT2C antagonism
D. Full D2 antagonism with 5-HT2A inverse agonism
Correct Answer: B
Rationale: Aripiprazole is a partial agonist at dopamine D2 and serotonin 5-HT1A
receptors and an antagonist at 5-HT2A receptors. This unique "dopamine system
stabilizer" profile provides antidepressant augmentation effects while minimizing
extrapyramidal symptoms and prolactin elevation seen with full D2 antagonists. The
partial agonism stabilizes dopamine transmission in key mesocorticolimbic pathways
involved in mood regulation.
2. A 28-year-old patient with bipolar I disorder is maintained on lithium 900
mg/day. She reports new-onset fine hand tremor, polyuria, and weight gain of 8
lbs over 3 months. Her serum lithium level is 1.2 mEq/L. What is the most
appropriate next step?
A. Decrease lithium to 600 mg/day and recheck level in 1 week
B. Add propranolol 20 mg TID for tremor management
C. Switch to valproic acid due to lithium intolerance
D. Obtain baseline thyroid function tests and renal function studies
,Correct Answer: D
Rationale: Lithium's adverse effects include nephrogenic diabetes insipidus (polyuria)
and hypothyroidism (weight gain). Before adjusting the lithium dose or adding
medications, the PMHNP should evaluate end-organ function with thyroid (TSH, free T4)
and renal (BUN, creatinine, urinalysis) studies. The serum level of 1.2 mEq/L is within
therapeutic range (0.8–1.2 mEq/L for acute maintenance), so dose reduction is not
immediately indicated without further evaluation.
3. Which of the following cytochrome P450 enzymes is primarily responsible for
the metabolism of fluoxetine and its active metabolite norfluoxetine, and what
clinical significance does this have for drug interactions?
A. CYP2D6; fluoxetine is a potent inhibitor, increasing levels of substrates like
risperidone and atomoxetine
B. CYP3A4; fluoxetine induces this enzyme, reducing levels of oral contraceptives
C. CYP1A2; fluoxetine is a substrate and inhibitor, affecting clozapine levels
D. CYP2C19; fluoxetine inhibits this enzyme, increasing citalopram levels
Correct Answer: A
Rationale: Fluoxetine and its active metabolite norfluoxetine are potent inhibitors of
CYP2D6. This interaction is clinically significant because many psychiatric medications
(e.g., risperidone, atomoxetine, tricyclic antidepressants) are CYP2D6 substrates. Co-
administration can lead to elevated levels of these medications, increasing the risk of
adverse effects. Fluoxetine also inhibits CYP2C19 and CYP3A4 to a lesser degree.
, 4. A 32-year-old patient with schizophrenia has been non-adherent to oral
antipsychotics. The PMHNP is considering long-acting injectable (LAI)
antipsychotics. Which LAI has the longest dosing interval and what is its
mechanism of action?
A. Fluphenazine decanoate – every 2–3 weeks; D2 antagonist
B. Aripiprazole lauroxil – every 4–6 weeks; D2 partial agonist
C. Paliperidone palmitate – every 1 month; D2 and 5-HT2A antagonist
D. Risperidone microspheres – every 2 weeks; D2 and 5-HT2A antagonist
Correct Answer: B
Rationale: Aripiprazole lauroxil can be administered at intervals of up to 6 weeks (441
mg, 662 mg, or 882 mg doses), making it one of the longest-acting LAIs available. It is a
partial agonist at D2 and 5-HT1A receptors and an antagonist at 5-HT2A receptors.
Paliperidone palmitate is available in monthly (1-month) and 3-month formulations; the
3-month formulation (Trinza) has the longest interval overall at 3 months.
5. A patient with treatment-resistant depression has been started on phenelzine,
an MAOI. Which dietary restriction is most critical to communicate to this patient
to prevent a hypertensive crisis?
A. Avoid aged cheeses, cured meats, and fermented foods
B. Avoid grapefruit juice and high-fat meals
C. Limit caffeine intake to less than 200 mg/day
D. Avoid foods high in tyramine, including aged cheeses, cured meats, and fermented
soy products
Correct Answer: D
Practice Examination: 150 High-Yield
Multiple-Choice Questions with Evidence-
Based Rationales Covering
Psychopharmacology, Neurobiology,
Differential Diagnosis, Psychotherapy, Ethics,
and Advanced Clinical Decision-Making for
Psychiatric-Mental Health Nurse Practitioner
Certification a well detailed one
written and graded A+ upgraded
Instructions
Select the single best answer for each question. Each question is designed to test
advanced clinical knowledge, diagnostic reasoning, and evidence-based practice at the
level expected for PMHNP board certification.
,Section 1: Psychopharmacology (Questions 1–30)
1. A 45-year-old patient with major depressive disorder has been taking fluoxetine
40 mg daily for 8 weeks with partial response. The PMHNP decides to augment
with aripiprazole. Which receptor profile makes aripiprazole uniquely suited as an
adjunctive agent in depression?
A. High-affinity 5-HT2A antagonism with mild D2 antagonism
B. Partial agonism at D2 and 5-HT1A receptors with 5-HT2A antagonism
C. Selective norepinephrine reuptake inhibition with 5-HT2C antagonism
D. Full D2 antagonism with 5-HT2A inverse agonism
Correct Answer: B
Rationale: Aripiprazole is a partial agonist at dopamine D2 and serotonin 5-HT1A
receptors and an antagonist at 5-HT2A receptors. This unique "dopamine system
stabilizer" profile provides antidepressant augmentation effects while minimizing
extrapyramidal symptoms and prolactin elevation seen with full D2 antagonists. The
partial agonism stabilizes dopamine transmission in key mesocorticolimbic pathways
involved in mood regulation.
2. A 28-year-old patient with bipolar I disorder is maintained on lithium 900
mg/day. She reports new-onset fine hand tremor, polyuria, and weight gain of 8
lbs over 3 months. Her serum lithium level is 1.2 mEq/L. What is the most
appropriate next step?
A. Decrease lithium to 600 mg/day and recheck level in 1 week
B. Add propranolol 20 mg TID for tremor management
C. Switch to valproic acid due to lithium intolerance
D. Obtain baseline thyroid function tests and renal function studies
,Correct Answer: D
Rationale: Lithium's adverse effects include nephrogenic diabetes insipidus (polyuria)
and hypothyroidism (weight gain). Before adjusting the lithium dose or adding
medications, the PMHNP should evaluate end-organ function with thyroid (TSH, free T4)
and renal (BUN, creatinine, urinalysis) studies. The serum level of 1.2 mEq/L is within
therapeutic range (0.8–1.2 mEq/L for acute maintenance), so dose reduction is not
immediately indicated without further evaluation.
3. Which of the following cytochrome P450 enzymes is primarily responsible for
the metabolism of fluoxetine and its active metabolite norfluoxetine, and what
clinical significance does this have for drug interactions?
A. CYP2D6; fluoxetine is a potent inhibitor, increasing levels of substrates like
risperidone and atomoxetine
B. CYP3A4; fluoxetine induces this enzyme, reducing levels of oral contraceptives
C. CYP1A2; fluoxetine is a substrate and inhibitor, affecting clozapine levels
D. CYP2C19; fluoxetine inhibits this enzyme, increasing citalopram levels
Correct Answer: A
Rationale: Fluoxetine and its active metabolite norfluoxetine are potent inhibitors of
CYP2D6. This interaction is clinically significant because many psychiatric medications
(e.g., risperidone, atomoxetine, tricyclic antidepressants) are CYP2D6 substrates. Co-
administration can lead to elevated levels of these medications, increasing the risk of
adverse effects. Fluoxetine also inhibits CYP2C19 and CYP3A4 to a lesser degree.
, 4. A 32-year-old patient with schizophrenia has been non-adherent to oral
antipsychotics. The PMHNP is considering long-acting injectable (LAI)
antipsychotics. Which LAI has the longest dosing interval and what is its
mechanism of action?
A. Fluphenazine decanoate – every 2–3 weeks; D2 antagonist
B. Aripiprazole lauroxil – every 4–6 weeks; D2 partial agonist
C. Paliperidone palmitate – every 1 month; D2 and 5-HT2A antagonist
D. Risperidone microspheres – every 2 weeks; D2 and 5-HT2A antagonist
Correct Answer: B
Rationale: Aripiprazole lauroxil can be administered at intervals of up to 6 weeks (441
mg, 662 mg, or 882 mg doses), making it one of the longest-acting LAIs available. It is a
partial agonist at D2 and 5-HT1A receptors and an antagonist at 5-HT2A receptors.
Paliperidone palmitate is available in monthly (1-month) and 3-month formulations; the
3-month formulation (Trinza) has the longest interval overall at 3 months.
5. A patient with treatment-resistant depression has been started on phenelzine,
an MAOI. Which dietary restriction is most critical to communicate to this patient
to prevent a hypertensive crisis?
A. Avoid aged cheeses, cured meats, and fermented foods
B. Avoid grapefruit juice and high-fat meals
C. Limit caffeine intake to less than 200 mg/day
D. Avoid foods high in tyramine, including aged cheeses, cured meats, and fermented
soy products
Correct Answer: D
