NRNP 6665 PMHNP Care Across the Lifespan I - Walden
University - Academic Year 2026/2027 - Midterm
Comprehensive Examination with 100 Verified Questions and
Correct Answer Rationales
About This Exam Bank
This comprehensive 148-question exam bank is designed to prepare candidates for NRNP 6665 PMHNP Care
Across the Lifespan I - Walden University - Academic Year 2026/2027 - Midterm Comprehensive Examination with
100 Verified Questions and Correct Answer Rationales. Every question is aligned with the latest official content
outline and includes a detailed, evidence-based rationale, an explanation of why each remaining option is incorrect,
and a supporting reference.
Keywords
NRNP 6665 PMHNP Care Across the Lifespan I - Walden University - Academic Year 2026/2027 - Midterm
Comprehensive Examination with 100 Verified Questions and Correct Answer Rationales, exam bank, practice
questions, verified answers, detailed rationales, test prep, study guide, review questions, certification exam, latest
update, NRNP 6665 PMHNP Care Across the Lifespan I - Walden University - Academic Year 2026/2027 - Midterm
Comprehensive Examination with 100 Verified Questions and Correct Answer Rationales, exam bank, practice
questions, verified answers, detailed rationales
PART 1: SYNTHESIZE NEUROBIOLOGICAL, DEVELOPMENTAL, AND PSYCHOSOCIAL
DATA TO FORMULATE DIFFERENTIAL DIAGNOSES ACROSS THE LIFESPAN
1. A patient with bipolar I disorder on lithium presents with coarse tremor, ataxia, and confusion. Serum lithium is
2.1 mEq/L, creatinine 1.8 mg/dL, and TSH elevated. Which intervention is most appropriate?
A) Continue lithium at reduced dose and monitor levels q12h.
B) Hold lithium, initiate hemodialysis, and evaluate for nephrogenic diabetes insipidus.
C) Administer levothyroxine and continue lithium with increased fluid intake.
D) Switch to valproate immediately and discharge with outpatient follow-up.
' Correct Answer: B
Rationale: Lithium level >2.0 mEq/L with neurotoxicity and renal impairment requires hemodialysis.
Hypothyroidism and NDI are chronic complications, not acute management. Continuing lithium or immediate
switch without stabilization is unsafe.
2. A patient with schizophrenia on clozapine develops fever, tachycardia, and rigidity. Labs show CK 1200 U/L,
WBC 12,000/µL, and eosinophilia. Which is the priority nursing action?
A) Administer benztropine for extrapyramidal symptoms.
B) Hold clozapine, obtain blood cultures, and prepare for ICU transfer.
C) Increase clozapine dose to stabilize psychosis.
D) Start lithium for mood stabilization.
' Correct Answer: B
Rationale: This presentation suggests neuroleptic malignant syndrome (NMS) or clozapine-induced myocarditis.
Immediate hold, cultures, and ICU monitoring are critical. Benztropine treats EPS, not NMS. Increasing clozapine or
adding lithium is contraindicated.
Page 1
,3. Which statement best reflects the neurobiological mechanism of ketamine in treatment-resistant depression?
A) It primarily inhibits serotonin reuptake, similar to SSRIs.
B) It antagonizes NMDA receptors, leading to rapid mTORC1 activation and synaptogenesis.
C) It blocks dopamine D2 receptors, reducing psychotic symptoms.
D) It enhances GABA-A receptor activity, producing sedation and mood elevation.
' Correct Answer: B
Rationale: Ketamine's rapid antidepressant effect is mediated by NMDA receptor antagonism, which triggers
mTORC1 signaling and synapse formation. SSRIs, D2 blockade, and GABA-A enhancement do not explain its rapid
action.
4. A patient with generalized anxiety disorder and opioid use disorder on buprenorphine/naloxone reports worsening
anxiety. Which medication is most appropriate to initiate?
A) Alprazolam
B) Duloxetine
C) Hydroxyzine
D) Quetiapine
' Correct Answer: B
Rationale: Duloxetine is FDA-approved for GAD and has no interaction with buprenorphine. Benzodiazepines like
alprazolam are contraindicated with opioids due to respiratory depression risk. Hydroxyzine is sedating but not
first-line. Quetiapine may worsen metabolic profile and is not first-line.
5. Which factor most strongly predicts increased suicide risk in a patient with borderline personality disorder?
A) Chronic feelings of emptiness
B) Recent discharge from psychiatric hospitalization
C) History of self-harm with low lethality
D) Comorbid narcissistic traits
' Correct Answer: B
Rationale: Recent psychiatric discharge is a high-risk period for suicide, especially in BPD. Chronic emptiness and
low-lethality self-harm are less predictive. Narcissistic traits are not primary predictors.
6. A patient with autism spectrum disorder and irritability is started on risperidone. Which adverse effect requires
immediate intervention?
A) Weight gain of 2 kg over 3 months
B) Prolactin level of 45 ng/mL
C) Tardive dyskinesia with tongue protrusion
D) Sedation in the morning
' Correct Answer: C
Rationale: Tardive dyskinesia is a potentially irreversible movement disorder requiring immediate discontinuation.
Weight gain, hyperprolactinemia, and sedation are monitored but not emergent.
7. Which psychotherapy modality has the strongest evidence for treating PTSD in adults?
A) Psychodynamic therapy
B) Prolonged exposure therapy
C) Dialectical behavior therapy
D) Supportive therapy
' Correct Answer: B
Rationale: Prolonged exposure therapy is a first-line, evidence-based treatment for PTSD. DBT is for BPD.
Psychodynamic and supportive therapies lack strong RCT evidence for PTSD.
Page 2
,8. A patient on fluoxetine reports sweating, diarrhea, and tremor after starting linezolid for MRSA. Which is the
most likely diagnosis?
A) Serotonin syndrome
B) Neuroleptic malignant syndrome
C) Anticholinergic toxicity
D) Thyroid storm
' Correct Answer: A
Rationale: Linezolid is a weak MAOI and can precipitate serotonin syndrome with SSRIs. Symptoms include
autonomic instability, neuromuscular excitation, and altered mental status. NMS, anticholinergic toxicity, and
thyroid storm have different presentations.
9. Which statement about transcranial magnetic stimulation (TMS) for depression is accurate?
A) It requires general anesthesia.
B) It is contraindicated in patients with cochlear implants.
C) It has a higher seizure risk than ECT.
D) It is ineffective for treatment-resistant depression.
' Correct Answer: B
Rationale: TMS is contraindicated with metallic implants in the head, including cochlear implants, due to heating
risk. It does not require anesthesia, has lower seizure risk than ECT, and is effective for treatment-resistant
depression.
10. A patient with schizophrenia has failed adequate trials of risperidone and olanzapine. Which agent is most
supported by current evidence for treatment-resistant psychosis, and what monitoring does it uniquely require?
A) Aripiprazole; monitor for akathisia and prolactin elevation
B) Clozapine; monitor absolute neutrophil count with REMS-mandated ANC monitoring
C) Quetiapine; monitor for QT prolongation and thyroid dysfunction
D) Haloperidol; monitor for tardive dyskinesia and neuroleptic malignant syndrome
' Correct Answer: B
Rationale: Clozapine is the only antipsychotic with established superiority in treatment-resistant schizophrenia and
requires ANC monitoring through the REMS program due to agranulocytosis risk. The other agents lack this unique
efficacy evidence and REMS requirement.
11. Which neurobiological mechanism best explains the therapeutic latency of SSRIs in major depressive disorder,
despite immediate serotonin reuptake inhibition?
A) Delayed increase in synaptic serotonin concentrations
B) Progressive downregulation of presynaptic 5-HT1A autoreceptors
C) Immediate upregulation of postsynaptic 5-HT2A receptors
D) Rapid desensitization of norepinephrine transporters
' Correct Answer: B
Rationale: SSRIs block reuptake immediately, but therapeutic effects require weeks of
desensitization/downregulation of somatodendritic 5-HT1A autoreceptors, which disinhibits serotonergic firing.
Synaptic serotonin rises quickly, so latency is not due to delayed concentration increases; 5-HT2A upregulation and
NET desensitization are not primary mechanisms.
12. A patient on lithium presents with coarse tremor, ataxia, and confusion. Lithium level is 2.1 mEq/L, creatinine
has risen, and TSH is elevated. Which intervention is most appropriate?
A) Continue lithium at a reduced dose and monitor levels
B) Hold lithium, administer IV fluids, and consider hemodialysis
Page 3
, C) Add a beta-blocker for tremor and recheck level in 24 hours
D) Switch to valproate and start levothyroxine
' Correct Answer: B
Rationale: This is moderate-to-severe lithium toxicity with renal and neurologic involvement; management
includes holding lithium, IV hydration, and hemodialysis for levels >2.0 mEq/L with symptoms. Reducing dose or
adding beta-blockers does not address toxicity, and switching agents is not acute management.
13. Which finding on the Mental Status Exam most strongly suggests delirium rather than dementia?
A) Impaired recent memory with preserved attention
B) Fluctuating level of consciousness and disorientation
C) Gradual onset of word-finding difficulty
D) Stable cognitive deficits over months
' Correct Answer: B
Rationale: Delirium is characterized by acute onset, fluctuating consciousness, and inattention, distinguishing it
from dementia's chronic, stable course. Memory impairment alone is nonspecific, and gradual or stable deficits point
toward dementia.
14. Which assessment tool is most appropriate for quantifying suicide risk in an outpatient psychiatric setting and
guiding disposition?
A) PHQ-9
B) C-SSRS
C) GAD-7
D) MMSE
' Correct Answer: B
Rationale: The Columbia-Suicide Severity Rating Scale (C-SSRS) is specifically designed to assess suicidal
ideation and behavior, aiding risk stratification. PHQ-9 and GAD-7 screen for depression and anxiety, and MMSE
assesses cognition.
15. A patient with bipolar I disorder on lamotrigine develops a rapidly spreading rash with mucosal involvement and
fever. What is the priority action?
A) Continue lamotrigine and add antihistamine
B) Discontinue lamotrigine immediately and seek emergency care
C) Reduce lamotrigine dose and monitor closely
D) Switch to valproate and start corticosteroid
' Correct Answer: B
Rationale: Mucosal involvement, fever, and rapid spread suggest Stevens-Johnson syndrome or toxic epidermal
necrolysis, a life-threatening reaction requiring immediate discontinuation and emergency care. Continuing or
reducing dose is dangerous, and switching agents does not address the acute emergency.
16. Which statement best reflects the concept of 'diagnostic overshadowing' in psychiatric care?
A) Attributing all physical symptoms to a psychiatric disorder, potentially missing medical illness
B) Misdiagnosing a psychiatric disorder as a medical condition
C) Overemphasis on psychosocial factors in treatment planning
D) Underreporting of side effects due to stigma
' Correct Answer: A
Rationale: Diagnostic overshadowing occurs when clinicians attribute physical symptoms to a known psychiatric
condition, leading to missed medical diagnoses. The other options describe different biases or phenomena, not this
specific error.
Page 4
University - Academic Year 2026/2027 - Midterm
Comprehensive Examination with 100 Verified Questions and
Correct Answer Rationales
About This Exam Bank
This comprehensive 148-question exam bank is designed to prepare candidates for NRNP 6665 PMHNP Care
Across the Lifespan I - Walden University - Academic Year 2026/2027 - Midterm Comprehensive Examination with
100 Verified Questions and Correct Answer Rationales. Every question is aligned with the latest official content
outline and includes a detailed, evidence-based rationale, an explanation of why each remaining option is incorrect,
and a supporting reference.
Keywords
NRNP 6665 PMHNP Care Across the Lifespan I - Walden University - Academic Year 2026/2027 - Midterm
Comprehensive Examination with 100 Verified Questions and Correct Answer Rationales, exam bank, practice
questions, verified answers, detailed rationales, test prep, study guide, review questions, certification exam, latest
update, NRNP 6665 PMHNP Care Across the Lifespan I - Walden University - Academic Year 2026/2027 - Midterm
Comprehensive Examination with 100 Verified Questions and Correct Answer Rationales, exam bank, practice
questions, verified answers, detailed rationales
PART 1: SYNTHESIZE NEUROBIOLOGICAL, DEVELOPMENTAL, AND PSYCHOSOCIAL
DATA TO FORMULATE DIFFERENTIAL DIAGNOSES ACROSS THE LIFESPAN
1. A patient with bipolar I disorder on lithium presents with coarse tremor, ataxia, and confusion. Serum lithium is
2.1 mEq/L, creatinine 1.8 mg/dL, and TSH elevated. Which intervention is most appropriate?
A) Continue lithium at reduced dose and monitor levels q12h.
B) Hold lithium, initiate hemodialysis, and evaluate for nephrogenic diabetes insipidus.
C) Administer levothyroxine and continue lithium with increased fluid intake.
D) Switch to valproate immediately and discharge with outpatient follow-up.
' Correct Answer: B
Rationale: Lithium level >2.0 mEq/L with neurotoxicity and renal impairment requires hemodialysis.
Hypothyroidism and NDI are chronic complications, not acute management. Continuing lithium or immediate
switch without stabilization is unsafe.
2. A patient with schizophrenia on clozapine develops fever, tachycardia, and rigidity. Labs show CK 1200 U/L,
WBC 12,000/µL, and eosinophilia. Which is the priority nursing action?
A) Administer benztropine for extrapyramidal symptoms.
B) Hold clozapine, obtain blood cultures, and prepare for ICU transfer.
C) Increase clozapine dose to stabilize psychosis.
D) Start lithium for mood stabilization.
' Correct Answer: B
Rationale: This presentation suggests neuroleptic malignant syndrome (NMS) or clozapine-induced myocarditis.
Immediate hold, cultures, and ICU monitoring are critical. Benztropine treats EPS, not NMS. Increasing clozapine or
adding lithium is contraindicated.
Page 1
,3. Which statement best reflects the neurobiological mechanism of ketamine in treatment-resistant depression?
A) It primarily inhibits serotonin reuptake, similar to SSRIs.
B) It antagonizes NMDA receptors, leading to rapid mTORC1 activation and synaptogenesis.
C) It blocks dopamine D2 receptors, reducing psychotic symptoms.
D) It enhances GABA-A receptor activity, producing sedation and mood elevation.
' Correct Answer: B
Rationale: Ketamine's rapid antidepressant effect is mediated by NMDA receptor antagonism, which triggers
mTORC1 signaling and synapse formation. SSRIs, D2 blockade, and GABA-A enhancement do not explain its rapid
action.
4. A patient with generalized anxiety disorder and opioid use disorder on buprenorphine/naloxone reports worsening
anxiety. Which medication is most appropriate to initiate?
A) Alprazolam
B) Duloxetine
C) Hydroxyzine
D) Quetiapine
' Correct Answer: B
Rationale: Duloxetine is FDA-approved for GAD and has no interaction with buprenorphine. Benzodiazepines like
alprazolam are contraindicated with opioids due to respiratory depression risk. Hydroxyzine is sedating but not
first-line. Quetiapine may worsen metabolic profile and is not first-line.
5. Which factor most strongly predicts increased suicide risk in a patient with borderline personality disorder?
A) Chronic feelings of emptiness
B) Recent discharge from psychiatric hospitalization
C) History of self-harm with low lethality
D) Comorbid narcissistic traits
' Correct Answer: B
Rationale: Recent psychiatric discharge is a high-risk period for suicide, especially in BPD. Chronic emptiness and
low-lethality self-harm are less predictive. Narcissistic traits are not primary predictors.
6. A patient with autism spectrum disorder and irritability is started on risperidone. Which adverse effect requires
immediate intervention?
A) Weight gain of 2 kg over 3 months
B) Prolactin level of 45 ng/mL
C) Tardive dyskinesia with tongue protrusion
D) Sedation in the morning
' Correct Answer: C
Rationale: Tardive dyskinesia is a potentially irreversible movement disorder requiring immediate discontinuation.
Weight gain, hyperprolactinemia, and sedation are monitored but not emergent.
7. Which psychotherapy modality has the strongest evidence for treating PTSD in adults?
A) Psychodynamic therapy
B) Prolonged exposure therapy
C) Dialectical behavior therapy
D) Supportive therapy
' Correct Answer: B
Rationale: Prolonged exposure therapy is a first-line, evidence-based treatment for PTSD. DBT is for BPD.
Psychodynamic and supportive therapies lack strong RCT evidence for PTSD.
Page 2
,8. A patient on fluoxetine reports sweating, diarrhea, and tremor after starting linezolid for MRSA. Which is the
most likely diagnosis?
A) Serotonin syndrome
B) Neuroleptic malignant syndrome
C) Anticholinergic toxicity
D) Thyroid storm
' Correct Answer: A
Rationale: Linezolid is a weak MAOI and can precipitate serotonin syndrome with SSRIs. Symptoms include
autonomic instability, neuromuscular excitation, and altered mental status. NMS, anticholinergic toxicity, and
thyroid storm have different presentations.
9. Which statement about transcranial magnetic stimulation (TMS) for depression is accurate?
A) It requires general anesthesia.
B) It is contraindicated in patients with cochlear implants.
C) It has a higher seizure risk than ECT.
D) It is ineffective for treatment-resistant depression.
' Correct Answer: B
Rationale: TMS is contraindicated with metallic implants in the head, including cochlear implants, due to heating
risk. It does not require anesthesia, has lower seizure risk than ECT, and is effective for treatment-resistant
depression.
10. A patient with schizophrenia has failed adequate trials of risperidone and olanzapine. Which agent is most
supported by current evidence for treatment-resistant psychosis, and what monitoring does it uniquely require?
A) Aripiprazole; monitor for akathisia and prolactin elevation
B) Clozapine; monitor absolute neutrophil count with REMS-mandated ANC monitoring
C) Quetiapine; monitor for QT prolongation and thyroid dysfunction
D) Haloperidol; monitor for tardive dyskinesia and neuroleptic malignant syndrome
' Correct Answer: B
Rationale: Clozapine is the only antipsychotic with established superiority in treatment-resistant schizophrenia and
requires ANC monitoring through the REMS program due to agranulocytosis risk. The other agents lack this unique
efficacy evidence and REMS requirement.
11. Which neurobiological mechanism best explains the therapeutic latency of SSRIs in major depressive disorder,
despite immediate serotonin reuptake inhibition?
A) Delayed increase in synaptic serotonin concentrations
B) Progressive downregulation of presynaptic 5-HT1A autoreceptors
C) Immediate upregulation of postsynaptic 5-HT2A receptors
D) Rapid desensitization of norepinephrine transporters
' Correct Answer: B
Rationale: SSRIs block reuptake immediately, but therapeutic effects require weeks of
desensitization/downregulation of somatodendritic 5-HT1A autoreceptors, which disinhibits serotonergic firing.
Synaptic serotonin rises quickly, so latency is not due to delayed concentration increases; 5-HT2A upregulation and
NET desensitization are not primary mechanisms.
12. A patient on lithium presents with coarse tremor, ataxia, and confusion. Lithium level is 2.1 mEq/L, creatinine
has risen, and TSH is elevated. Which intervention is most appropriate?
A) Continue lithium at a reduced dose and monitor levels
B) Hold lithium, administer IV fluids, and consider hemodialysis
Page 3
, C) Add a beta-blocker for tremor and recheck level in 24 hours
D) Switch to valproate and start levothyroxine
' Correct Answer: B
Rationale: This is moderate-to-severe lithium toxicity with renal and neurologic involvement; management
includes holding lithium, IV hydration, and hemodialysis for levels >2.0 mEq/L with symptoms. Reducing dose or
adding beta-blockers does not address toxicity, and switching agents is not acute management.
13. Which finding on the Mental Status Exam most strongly suggests delirium rather than dementia?
A) Impaired recent memory with preserved attention
B) Fluctuating level of consciousness and disorientation
C) Gradual onset of word-finding difficulty
D) Stable cognitive deficits over months
' Correct Answer: B
Rationale: Delirium is characterized by acute onset, fluctuating consciousness, and inattention, distinguishing it
from dementia's chronic, stable course. Memory impairment alone is nonspecific, and gradual or stable deficits point
toward dementia.
14. Which assessment tool is most appropriate for quantifying suicide risk in an outpatient psychiatric setting and
guiding disposition?
A) PHQ-9
B) C-SSRS
C) GAD-7
D) MMSE
' Correct Answer: B
Rationale: The Columbia-Suicide Severity Rating Scale (C-SSRS) is specifically designed to assess suicidal
ideation and behavior, aiding risk stratification. PHQ-9 and GAD-7 screen for depression and anxiety, and MMSE
assesses cognition.
15. A patient with bipolar I disorder on lamotrigine develops a rapidly spreading rash with mucosal involvement and
fever. What is the priority action?
A) Continue lamotrigine and add antihistamine
B) Discontinue lamotrigine immediately and seek emergency care
C) Reduce lamotrigine dose and monitor closely
D) Switch to valproate and start corticosteroid
' Correct Answer: B
Rationale: Mucosal involvement, fever, and rapid spread suggest Stevens-Johnson syndrome or toxic epidermal
necrolysis, a life-threatening reaction requiring immediate discontinuation and emergency care. Continuing or
reducing dose is dangerous, and switching agents does not address the acute emergency.
16. Which statement best reflects the concept of 'diagnostic overshadowing' in psychiatric care?
A) Attributing all physical symptoms to a psychiatric disorder, potentially missing medical illness
B) Misdiagnosing a psychiatric disorder as a medical condition
C) Overemphasis on psychosocial factors in treatment planning
D) Underreporting of side effects due to stigma
' Correct Answer: A
Rationale: Diagnostic overshadowing occurs when clinicians attribute physical symptoms to a known psychiatric
condition, leading to missed medical diagnoses. The other options describe different biases or phenomena, not this
specific error.
Page 4
