NR 547 MENTAL HEALTH EXAM
PREP 2026 | MIDTERM & FINAL
QUESTIONS AND ANSWERS WITH
RATIONALES
1. A patient is started on fluoxetine (Prozac) for major depressive disorder. The PMHNP
understands that the therapeutic effect of SSRIs is primarily due to:
• A. Blocking dopamine D2 receptors
• B. Inhibiting the reuptake of serotonin at the presynaptic neuron
• C. Increasing the breakdown of acetylcholine
• D. Enhancing GABA activity in the central nervous system
Rationale: SSRIs like fluoxetine work by selectively blocking the reuptake of serotonin at the
presynaptic neuron, which increases the availability of serotonin in the synaptic cleft . Option A
is incorrect as it describes the mechanism of antipsychotics. Option C describes the mechanism
of Alzheimer's medications (e.g., donepezil). Option D is incorrect as it describes the mechanism
of benzodiazepines and other GABAergic drugs.
2. A patient with schizophrenia is prescribed aripiprazole (Abilify). The PMHNP explains that
this medication is classified as a:
• A. First-generation (typical) antipsychotic
• B. Dopamine D2 partial agonist
• C. Selective serotonin reuptake inhibitor (SSRI)
• D. Tricyclic antidepressant (TCA)
,Rationale: Aripiprazole is a second-generation (atypical) antipsychotic that acts as a dopamine
D2 partial agonist and serotonin 5-HT1A partial agonist . This mechanism allows it to stabilize
dopamine activity. Option A is incorrect (typical antipsychotics are first-generation, e.g.,
haloperidol). Options C and D are antidepressant classes unrelated to the primary antipsychotic
effect.
3. A patient with bipolar disorder is prescribed lithium carbonate. The PMHNP should
monitor which of the following laboratory values to assess for toxicity?
• A. Liver function tests (LFTs)
• B. Serum lithium level
• C. Complete blood count (CBC)
• D. Thyroid-stimulating hormone (TSH)
Rationale: Lithium has a narrow therapeutic index (0.6-1.2 mEq/L). Serum levels greater than
1.5 mEq/L risk toxicity, which can present with symptoms like tremor, confusion, and seizures .
While thyroid and renal function are monitored during lithium therapy, the primary laboratory
value for assessing acute toxicity is the serum lithium level.
4. Which of the following is a legal exception to client confidentiality?
• A. Routine therapy updates
• B. Client dissatisfaction with care
• C. Mandatory reporting of abuse
• D. Patient request for privacy
Rationale: Providers are legally required to report suspected abuse, neglect, or imminent harm,
even without client consent . This is a well-established exception to confidentiality. Options A
and B do not override confidentiality; Option D reinforces the principle of confidentiality rather
than breaking it.
,5. A 22-year-old patient presents with hallucinations, delusions, and disorganized speech that
have been present for 4 months, accompanied by significant social and occupational decline.
A family history is positive for schizophrenia. What is the most appropriate DSM-5-TR
diagnosis?
• A. Brief Psychotic Disorder
• B. Schizophreniform Disorder
• C. Schizophrenia
• D. Schizoaffective Disorder
Rationale: Schizophrenia requires the presence of active and prodromal symptoms for at least
6 months with a decline in functioning . The scenario's 4-month duration is too short for a
schizophrenia diagnosis. Schizophreniform disorder is the correct diagnosis when symptoms
meet the criteria for schizophrenia but have lasted between 1 and 6 months . Brief Psychotic
Disorder is for episodes lasting less than 1 month, and Schizoaffective Disorder requires a major
mood episode occurring concurrently with the psychotic symptoms .
6. A 45-year-old immigrant patient presents with multiple somatic complaints and expresses
distress using culturally specific idioms. To ensure diagnostic accuracy, what is the PMHNP's
priority action?
• A. Administer a standardized Western symptom checklist.
• B. Immediately diagnose a Somatic Symptom Disorder.
• C. Refer to a medical specialist to rule out physical causes.
• D. Conduct the Cultural Formulation Interview (CFI) to understand cultural identity
and explanations.
Rationale: The DSM-5 Cultural Formulation Interview (CFI) is a validated tool designed to help
clinicians systematically assess cultural factors that influence symptom expression, meaning,
and help-seeking behavior . This is the priority to avoid misdiagnosis. Standardized Western
, checklists may lack cultural validity, and diagnosing a somatic disorder without cultural context
is premature . While ruling out medical causes is important, it is not the first action to ensure
accurate diagnostic formulation in this culturally complex presentation.
7. A 28-year-old patient presents with tangential speech, clang associations, and grossly
disorganized behavior during a mental status exam. The PMHNP recognizes these findings as
most consistent with which domain of psychopathology?
• A. Thought process disorder
• B. Thought content disorder
• C. Perceptual disturbance
• D. Sensorium impairment
Rationale: Tangentiality and clang associations are classic examples of formal thought
disorders, reflecting disturbances in the form or process of thinking . Thought content disorders
involve delusions or preoccupations, perceptual disturbances include hallucinations, and
sensorium impairment refers to disturbances in consciousness or orientation .
8. A 62-year-old patient presents with new-onset depression, apathy, and slowed
psychomotor activity. Which medical condition must be ruled out before confirming a
primary psychiatric diagnosis?
• A. Hyperthyroidism
• B. Hypothyroidism
• C. Cushing's syndrome
• D. Pheochromocytoma
Rationale: Hypothyroidism is one of the most common medical mimics of major depressive
disorder, frequently presenting with fatigue, depressed mood, psychomotor retardation, and
cognitive slowing . Hyperthyroidism typically presents with anxiety and insomnia, Cushing's
syndrome is a less common cause of depression, and Pheochromocytoma typically presents
PREP 2026 | MIDTERM & FINAL
QUESTIONS AND ANSWERS WITH
RATIONALES
1. A patient is started on fluoxetine (Prozac) for major depressive disorder. The PMHNP
understands that the therapeutic effect of SSRIs is primarily due to:
• A. Blocking dopamine D2 receptors
• B. Inhibiting the reuptake of serotonin at the presynaptic neuron
• C. Increasing the breakdown of acetylcholine
• D. Enhancing GABA activity in the central nervous system
Rationale: SSRIs like fluoxetine work by selectively blocking the reuptake of serotonin at the
presynaptic neuron, which increases the availability of serotonin in the synaptic cleft . Option A
is incorrect as it describes the mechanism of antipsychotics. Option C describes the mechanism
of Alzheimer's medications (e.g., donepezil). Option D is incorrect as it describes the mechanism
of benzodiazepines and other GABAergic drugs.
2. A patient with schizophrenia is prescribed aripiprazole (Abilify). The PMHNP explains that
this medication is classified as a:
• A. First-generation (typical) antipsychotic
• B. Dopamine D2 partial agonist
• C. Selective serotonin reuptake inhibitor (SSRI)
• D. Tricyclic antidepressant (TCA)
,Rationale: Aripiprazole is a second-generation (atypical) antipsychotic that acts as a dopamine
D2 partial agonist and serotonin 5-HT1A partial agonist . This mechanism allows it to stabilize
dopamine activity. Option A is incorrect (typical antipsychotics are first-generation, e.g.,
haloperidol). Options C and D are antidepressant classes unrelated to the primary antipsychotic
effect.
3. A patient with bipolar disorder is prescribed lithium carbonate. The PMHNP should
monitor which of the following laboratory values to assess for toxicity?
• A. Liver function tests (LFTs)
• B. Serum lithium level
• C. Complete blood count (CBC)
• D. Thyroid-stimulating hormone (TSH)
Rationale: Lithium has a narrow therapeutic index (0.6-1.2 mEq/L). Serum levels greater than
1.5 mEq/L risk toxicity, which can present with symptoms like tremor, confusion, and seizures .
While thyroid and renal function are monitored during lithium therapy, the primary laboratory
value for assessing acute toxicity is the serum lithium level.
4. Which of the following is a legal exception to client confidentiality?
• A. Routine therapy updates
• B. Client dissatisfaction with care
• C. Mandatory reporting of abuse
• D. Patient request for privacy
Rationale: Providers are legally required to report suspected abuse, neglect, or imminent harm,
even without client consent . This is a well-established exception to confidentiality. Options A
and B do not override confidentiality; Option D reinforces the principle of confidentiality rather
than breaking it.
,5. A 22-year-old patient presents with hallucinations, delusions, and disorganized speech that
have been present for 4 months, accompanied by significant social and occupational decline.
A family history is positive for schizophrenia. What is the most appropriate DSM-5-TR
diagnosis?
• A. Brief Psychotic Disorder
• B. Schizophreniform Disorder
• C. Schizophrenia
• D. Schizoaffective Disorder
Rationale: Schizophrenia requires the presence of active and prodromal symptoms for at least
6 months with a decline in functioning . The scenario's 4-month duration is too short for a
schizophrenia diagnosis. Schizophreniform disorder is the correct diagnosis when symptoms
meet the criteria for schizophrenia but have lasted between 1 and 6 months . Brief Psychotic
Disorder is for episodes lasting less than 1 month, and Schizoaffective Disorder requires a major
mood episode occurring concurrently with the psychotic symptoms .
6. A 45-year-old immigrant patient presents with multiple somatic complaints and expresses
distress using culturally specific idioms. To ensure diagnostic accuracy, what is the PMHNP's
priority action?
• A. Administer a standardized Western symptom checklist.
• B. Immediately diagnose a Somatic Symptom Disorder.
• C. Refer to a medical specialist to rule out physical causes.
• D. Conduct the Cultural Formulation Interview (CFI) to understand cultural identity
and explanations.
Rationale: The DSM-5 Cultural Formulation Interview (CFI) is a validated tool designed to help
clinicians systematically assess cultural factors that influence symptom expression, meaning,
and help-seeking behavior . This is the priority to avoid misdiagnosis. Standardized Western
, checklists may lack cultural validity, and diagnosing a somatic disorder without cultural context
is premature . While ruling out medical causes is important, it is not the first action to ensure
accurate diagnostic formulation in this culturally complex presentation.
7. A 28-year-old patient presents with tangential speech, clang associations, and grossly
disorganized behavior during a mental status exam. The PMHNP recognizes these findings as
most consistent with which domain of psychopathology?
• A. Thought process disorder
• B. Thought content disorder
• C. Perceptual disturbance
• D. Sensorium impairment
Rationale: Tangentiality and clang associations are classic examples of formal thought
disorders, reflecting disturbances in the form or process of thinking . Thought content disorders
involve delusions or preoccupations, perceptual disturbances include hallucinations, and
sensorium impairment refers to disturbances in consciousness or orientation .
8. A 62-year-old patient presents with new-onset depression, apathy, and slowed
psychomotor activity. Which medical condition must be ruled out before confirming a
primary psychiatric diagnosis?
• A. Hyperthyroidism
• B. Hypothyroidism
• C. Cushing's syndrome
• D. Pheochromocytoma
Rationale: Hypothyroidism is one of the most common medical mimics of major depressive
disorder, frequently presenting with fatigue, depressed mood, psychomotor retardation, and
cognitive slowing . Hyperthyroidism typically presents with anxiety and insomnia, Cushing's
syndrome is a less common cause of depression, and Pheochromocytoma typically presents
