Barkley PMHNP Exam Practice Questions:
Complete 250-Q Test Bank with Verified
Answers & Detailed Rationales | Psychiatric-
Mental Health Nurse Practitioner
Certification Review | 2026/2027 Edition |
100% Pass Guarantee
SECTION 1: NEUROBIOLOGY AND PSYCHOPHARMACOLOGY (Questions 1-50)
1. Which neurotransmitter is most closely associated with the regulation of mood,
appetite, and sleep, and is often targeted in the treatment of depression?
• A. Dopamine
• B. GABA
• C. Serotonin
• D. Acetylcholine
Answer: C (Serotonin)
Rationale: Serotonin plays a key role in mood regulation, appetite, and sleep. SSRIs
increase serotonin availability, alleviating depressive symptoms. Dopamine relates more
to reward and motivation, GABA to inhibition, and acetylcholine to cognition .
2. Which neurotransmitter is primarily associated with positive symptoms of
schizophrenia?
• A. Serotonin
• B. Dopamine
• C. GABA
• D. Acetylcholine
,Answer: B (Dopamine)
Rationale: Hyperactivity of dopaminergic pathways (mesolimbic) is associated with
positive psychotic symptoms like hallucinations and delusions .
3. Which neurotransmitter deficiency is associated with Alzheimer's disease?
• A. Dopamine
• B. Acetylcholine
• C. GABA
• D. Glutamate
Answer: B (Acetylcholine)
Rationale: Cholinergic neuronal loss in the basal forebrain contributes to memory
impairment in Alzheimer's disease .
4. Which antipsychotic has the greatest risk of metabolic side effects, including
significant weight gain?
• A. Ziprasidone
• B. Aripiprazole
• C. Clozapine
• D. Lurasidone
Answer: C (Clozapine)
Rationale: Clozapine is associated with the highest risk of metabolic syndrome,
including significant weight gain, dyslipidemia, and diabetes. Olanzapine also carries
high risk, but clozapine is the highest. While both are high-risk, clozapine's risk profile is
the most severe, requiring routine metabolic monitoring .
5. Which atypical antipsychotic is most associated with weight gain, dyslipidemia,
and diabetes risk?
, • A. Risperidone
• B. Aripiprazole
• C. Olanzapine
• D. Ziprasidone
Answer: C (Olanzapine)
Rationale: Olanzapine is associated with weight gain, dyslipidemia, and diabetes risk.
Aripiprazole and ziprasidone have lower metabolic risk profiles .
6. Which lab monitoring is necessary for a patient starting lithium?
• A. CBC and LFTs
• B. Serum lithium, renal function, thyroid function
• C. Fasting glucose and lipids
• D. TSH only
Answer: B (Serum lithium, renal function, thyroid function)
Rationale: Lithium is renally cleared and can affect thyroid function; regular monitoring
prevents toxicity. Baseline kidney and thyroid studies ensure safe initiation. CBC or liver
tests are important for other medications like valproate .
7. A patient on lithium with a serum level of 1.8 mEq/L develops tremors and
nausea. What is the appropriate next step?
• A. Continue lithium at the same dose
• B. Add propranolol to control tremors
• C. Hold lithium and monitor hydration status
• D. Decrease lithium by 50%
Answer: C (Hold lithium and monitor hydration status)
Rationale: A level of 1.8 mEq/L is toxic (therapeutic range 0.6-1.2 mEq/L). The drug
, should be held, and hydration maintained to promote excretion. Once the patient
stabilizes, a lower dose may be restarted .
8. Common side effects of lithium therapy include: (Select all that apply)
• A. Polyuria/polydipsia
• B. Weight gain
• C. Tremor
• D. Bradycardia
• E. Hypothyroidism
Answer: A, B, C, E
Rationale: Lithium can cause renal (polyuria/polydipsia), metabolic (weight gain),
neurologic (tremor), and endocrine (hypothyroidism) effects. Bradycardia is uncommon .
9. A patient on clozapine complains of fatigue and fever. What laboratory test is
indicated immediately?
• A. Liver function test
• B. Absolute neutrophil count (ANC)
• C. Serum prolactin
• D. TSH
Answer: B (Absolute neutrophil count/ANC)
Rationale: Clozapine can cause agranulocytosis; any infection-like symptoms (fever,
sore throat, malaise) necessitate checking ANC per REMS requirements .
10. Clozapine requires routine monitoring of which laboratory value?
• A. Serum lithium levels
• B. CBC with differential (ANC)
Complete 250-Q Test Bank with Verified
Answers & Detailed Rationales | Psychiatric-
Mental Health Nurse Practitioner
Certification Review | 2026/2027 Edition |
100% Pass Guarantee
SECTION 1: NEUROBIOLOGY AND PSYCHOPHARMACOLOGY (Questions 1-50)
1. Which neurotransmitter is most closely associated with the regulation of mood,
appetite, and sleep, and is often targeted in the treatment of depression?
• A. Dopamine
• B. GABA
• C. Serotonin
• D. Acetylcholine
Answer: C (Serotonin)
Rationale: Serotonin plays a key role in mood regulation, appetite, and sleep. SSRIs
increase serotonin availability, alleviating depressive symptoms. Dopamine relates more
to reward and motivation, GABA to inhibition, and acetylcholine to cognition .
2. Which neurotransmitter is primarily associated with positive symptoms of
schizophrenia?
• A. Serotonin
• B. Dopamine
• C. GABA
• D. Acetylcholine
,Answer: B (Dopamine)
Rationale: Hyperactivity of dopaminergic pathways (mesolimbic) is associated with
positive psychotic symptoms like hallucinations and delusions .
3. Which neurotransmitter deficiency is associated with Alzheimer's disease?
• A. Dopamine
• B. Acetylcholine
• C. GABA
• D. Glutamate
Answer: B (Acetylcholine)
Rationale: Cholinergic neuronal loss in the basal forebrain contributes to memory
impairment in Alzheimer's disease .
4. Which antipsychotic has the greatest risk of metabolic side effects, including
significant weight gain?
• A. Ziprasidone
• B. Aripiprazole
• C. Clozapine
• D. Lurasidone
Answer: C (Clozapine)
Rationale: Clozapine is associated with the highest risk of metabolic syndrome,
including significant weight gain, dyslipidemia, and diabetes. Olanzapine also carries
high risk, but clozapine is the highest. While both are high-risk, clozapine's risk profile is
the most severe, requiring routine metabolic monitoring .
5. Which atypical antipsychotic is most associated with weight gain, dyslipidemia,
and diabetes risk?
, • A. Risperidone
• B. Aripiprazole
• C. Olanzapine
• D. Ziprasidone
Answer: C (Olanzapine)
Rationale: Olanzapine is associated with weight gain, dyslipidemia, and diabetes risk.
Aripiprazole and ziprasidone have lower metabolic risk profiles .
6. Which lab monitoring is necessary for a patient starting lithium?
• A. CBC and LFTs
• B. Serum lithium, renal function, thyroid function
• C. Fasting glucose and lipids
• D. TSH only
Answer: B (Serum lithium, renal function, thyroid function)
Rationale: Lithium is renally cleared and can affect thyroid function; regular monitoring
prevents toxicity. Baseline kidney and thyroid studies ensure safe initiation. CBC or liver
tests are important for other medications like valproate .
7. A patient on lithium with a serum level of 1.8 mEq/L develops tremors and
nausea. What is the appropriate next step?
• A. Continue lithium at the same dose
• B. Add propranolol to control tremors
• C. Hold lithium and monitor hydration status
• D. Decrease lithium by 50%
Answer: C (Hold lithium and monitor hydration status)
Rationale: A level of 1.8 mEq/L is toxic (therapeutic range 0.6-1.2 mEq/L). The drug
, should be held, and hydration maintained to promote excretion. Once the patient
stabilizes, a lower dose may be restarted .
8. Common side effects of lithium therapy include: (Select all that apply)
• A. Polyuria/polydipsia
• B. Weight gain
• C. Tremor
• D. Bradycardia
• E. Hypothyroidism
Answer: A, B, C, E
Rationale: Lithium can cause renal (polyuria/polydipsia), metabolic (weight gain),
neurologic (tremor), and endocrine (hypothyroidism) effects. Bradycardia is uncommon .
9. A patient on clozapine complains of fatigue and fever. What laboratory test is
indicated immediately?
• A. Liver function test
• B. Absolute neutrophil count (ANC)
• C. Serum prolactin
• D. TSH
Answer: B (Absolute neutrophil count/ANC)
Rationale: Clozapine can cause agranulocytosis; any infection-like symptoms (fever,
sore throat, malaise) necessitate checking ANC per REMS requirements .
10. Clozapine requires routine monitoring of which laboratory value?
• A. Serum lithium levels
• B. CBC with differential (ANC)
