NURS 6521 Advanced Pharmacology | Walden
University NURS 6521 Study Guide & Exam Prep
2026/2027 | Advanced Practice Nursing
Pharmacology, Pharmacokinetics,
Pharmacodynamics, Drug Interactions, Adverse
Effects, Safe Prescribing, Medication
Management, Therapeutic Drug Selection,
Disease-Specific Pharmacotherapy, Practice
Questions, Answers & Detailed Rationales
Question 1: A 68-year-old patient with a history of chronic kidney disease
(Stage 3) is prescribed apixaban for the prevention of stroke in non-valvular
atrial fibrillation. Which of the following is the most critical parameter to
monitor in this patient to ensure safe medication use?
A. Serum potassium levels
B. Serum creatinine and estimated glomerular filtration rate (eGFR)
C. International Normalized Ratio (INR)
D. Hepatic transaminase levels
CORRECT ANSWER: B. Serum creatinine and estimated glomerular filtration
rate (eGFR)
Rationale: Apixaban is partially renally eliminated. In patients with renal impairment
(CrCl 15-29 mL/min), dose reduction is recommended. Monitoring renal function is
crucial to prevent drug accumulation and increased bleeding risk. INR is not used to
monitor direct oral anticoagulants (DOACs).
Question 2: A 45-year-old female patient with moderate-to-severe major
depressive disorder has been taking fluoxetine 40 mg daily for the past six
months. She reports feeling "emotionally numb" and requests a medication
change. What is the most appropriate next step in her pharmacologic
management?
A. Add bupropion to the fluoxetine regimen
B. Discontinue fluoxetine abruptly and start sertraline
C. Cross-taper fluoxetine to vortioxetine
D. Increase fluoxetine to 60 mg daily
CORRECT ANSWER: C. Cross-taper fluoxetine to vortioxetine
Rationale: Fluoxetine has a long half-life, making abrupt discontinuation and immediate
switch to another SSRI less ideal. A cross-taper is recommended to minimize withdrawal
symptoms. Vortioxetine has a different mechanism (5-HT3, 5-HT7 antagonism) and may
address emotional blunting.
,Question 3: A 72-year-old male with Parkinson's disease is experiencing
significant "off" episodes. His current regimen includes carbidopa-levodopa
25/100 mg three times daily. Which adjunctive therapy is most appropriate to
reduce "off" time?
A. Amantadine
B. Entacapone
C. Benztropine
D. Selegiline
CORRECT ANSWER: B. Entacapone
Rationale: Entacapone is a COMT inhibitor that prevents the peripheral breakdown of
levodopa, thereby increasing its half-life and availability in the brain. This reduces "off"
time in patients with Parkinson's disease.
Question 4: A 34-year-old female with a history of migraine with aura is
seeking contraception. Which of the following contraceptive options is strictly
contraindicated due to increased risk of stroke?
A. Progestin-only pill
B. Combined oral contraceptive (COC)
C. Intrauterine device (IUD)
D. Etonogestrel implant
CORRECT ANSWER: B. Combined oral contraceptive (COC)
Rationale: Estrogen-containing contraceptives are contraindicated in women with
migraine with aura due to a significantly increased risk of ischemic stroke. Progestin-
only methods are considered safe alternatives.
Question 5: A patient is started on warfarin for deep vein thrombosis. Which of
the following dietary changes would most likely result in a subtherapeutic
INR?
A. Increased consumption of green leafy vegetables
B. Increased consumption of grapefruit juice
C. Increased consumption of cranberry juice
D. Decreased consumption of vitamin K-rich foods
CORRECT ANSWER: A. Increased consumption of green leafy vegetables
Rationale: Green leafy vegetables are rich in vitamin K, which is the antidote for
warfarin. Increased intake reverses the anticoagulant effect, leading to a lower INR
(subtherapeutic).
,Question 6: A 56-year-old male with type 2 diabetes mellitus and heart failure
with reduced ejection fraction (HFrEF) is started on a new medication. Which
antihyperglycemic agent has been proven to reduce cardiovascular mortality
and hospitalization for heart failure in this population?
A. Sitagliptin
B. Pioglitazone
C. Empagliflozin
D. Glipizide
CORRECT ANSWER: C. Empagliflozin
Rationale: SGLT2 inhibitors like empagliflozin have demonstrated significant reductions
in cardiovascular death and heart failure hospitalizations in patients with type 2 diabetes
and established cardiovascular disease or HFrEF, regardless of glycemic control.
Question 7: A patient is prescribed gentamicin for a severe Pseudomonas
infection. Which of the following is the primary mechanism of action for this
antibiotic class?
A. Inhibition of cell wall synthesis
B. Inhibition of protein synthesis by binding to the 30S ribosomal subunit
C. Inhibition of DNA gyrase
D. Disruption of the bacterial cell membrane
CORRECT ANSWER: B. Inhibition of protein synthesis by binding to the 30S
ribosomal subunit
Rationale: Gentamicin is an aminoglycoside that binds irreversibly to the 30S ribosomal
subunit, causing misreading of mRNA and ultimately inhibiting bacterial protein
synthesis. This is bactericidal.
Question 8: A 28-year-old female with generalized anxiety disorder (GAD) is
prescribed buspirone. The patient asks why this medication is not a
benzodiazepine. What is the most appropriate explanation regarding the
mechanism of buspirone?
A. It potentiates GABA at the GABA-A receptor.
B. It acts as a partial agonist at 5-HT1A receptors.
C. It blocks dopamine D2 receptors in the mesolimbic pathway.
D. It inhibits the reuptake of serotonin and norepinephrine.
CORRECT ANSWER: B. It acts as a partial agonist at 5-HT1A receptors.
Rationale: Buspirone is a non-benzodiazepine anxiolytic. Its primary mechanism is as a
partial agonist at serotonin 5-HT1A receptors. It does not have the GABA-ergic activity
associated with benzodiazepines, nor does it carry the same risk of dependence.
, Question 9: A 65-year-old patient with chronic obstructive pulmonary disease
(COPD) and a history of narrow-angle glaucoma is prescribed a medication for
his COPD. Which of the following medications is contraindicated in this
patient?
A. Albuterol
B. Tiotropium
C. Budesonide
D. Roflumilast
CORRECT ANSWER: B. Tiotropium
Rationale: Tiotropium is a long-acting anticholinergic (LAMA). Anticholinergics can
precipitate acute angle-closure glaucoma in patients with narrow angles due to
mydriasis and obstruction of aqueous humor outflow.
Question 10: A patient is receiving a continuous infusion of heparin. Which of
the following laboratory values is most appropriate to monitor for dose
adjustment to achieve therapeutic anticoagulation?
A. Prothrombin time (PT)
B. Activated partial thromboplastin time (aPTT)
C. International Normalized Ratio (INR)
D. Platelet count
CORRECT ANSWER: B. Activated partial thromboplastin time (aPTT)
Rationale: Heparin primarily affects the intrinsic pathway of the coagulation cascade.
aPTT is the standard test used to monitor unfractionated heparin therapy. PT/INR is
used for warfarin monitoring.
Question 11: A 72-year-old male with Alzheimer's disease is prescribed
donepezil. The patient's family reports that he has been experiencing vivid
nightmares and insomnia. What is the most likely underlying cause of these
adverse effects?
A. Antagonism of NMDA receptors
B. Overstimulation of central cholinergic pathways
C. Inhibition of acetylcholinesterase in the peripheral nervous system
D. Activation of dopamine D2 receptors in the limbic system
CORRECT ANSWER: B. Overstimulation of central cholinergic pathways
University NURS 6521 Study Guide & Exam Prep
2026/2027 | Advanced Practice Nursing
Pharmacology, Pharmacokinetics,
Pharmacodynamics, Drug Interactions, Adverse
Effects, Safe Prescribing, Medication
Management, Therapeutic Drug Selection,
Disease-Specific Pharmacotherapy, Practice
Questions, Answers & Detailed Rationales
Question 1: A 68-year-old patient with a history of chronic kidney disease
(Stage 3) is prescribed apixaban for the prevention of stroke in non-valvular
atrial fibrillation. Which of the following is the most critical parameter to
monitor in this patient to ensure safe medication use?
A. Serum potassium levels
B. Serum creatinine and estimated glomerular filtration rate (eGFR)
C. International Normalized Ratio (INR)
D. Hepatic transaminase levels
CORRECT ANSWER: B. Serum creatinine and estimated glomerular filtration
rate (eGFR)
Rationale: Apixaban is partially renally eliminated. In patients with renal impairment
(CrCl 15-29 mL/min), dose reduction is recommended. Monitoring renal function is
crucial to prevent drug accumulation and increased bleeding risk. INR is not used to
monitor direct oral anticoagulants (DOACs).
Question 2: A 45-year-old female patient with moderate-to-severe major
depressive disorder has been taking fluoxetine 40 mg daily for the past six
months. She reports feeling "emotionally numb" and requests a medication
change. What is the most appropriate next step in her pharmacologic
management?
A. Add bupropion to the fluoxetine regimen
B. Discontinue fluoxetine abruptly and start sertraline
C. Cross-taper fluoxetine to vortioxetine
D. Increase fluoxetine to 60 mg daily
CORRECT ANSWER: C. Cross-taper fluoxetine to vortioxetine
Rationale: Fluoxetine has a long half-life, making abrupt discontinuation and immediate
switch to another SSRI less ideal. A cross-taper is recommended to minimize withdrawal
symptoms. Vortioxetine has a different mechanism (5-HT3, 5-HT7 antagonism) and may
address emotional blunting.
,Question 3: A 72-year-old male with Parkinson's disease is experiencing
significant "off" episodes. His current regimen includes carbidopa-levodopa
25/100 mg three times daily. Which adjunctive therapy is most appropriate to
reduce "off" time?
A. Amantadine
B. Entacapone
C. Benztropine
D. Selegiline
CORRECT ANSWER: B. Entacapone
Rationale: Entacapone is a COMT inhibitor that prevents the peripheral breakdown of
levodopa, thereby increasing its half-life and availability in the brain. This reduces "off"
time in patients with Parkinson's disease.
Question 4: A 34-year-old female with a history of migraine with aura is
seeking contraception. Which of the following contraceptive options is strictly
contraindicated due to increased risk of stroke?
A. Progestin-only pill
B. Combined oral contraceptive (COC)
C. Intrauterine device (IUD)
D. Etonogestrel implant
CORRECT ANSWER: B. Combined oral contraceptive (COC)
Rationale: Estrogen-containing contraceptives are contraindicated in women with
migraine with aura due to a significantly increased risk of ischemic stroke. Progestin-
only methods are considered safe alternatives.
Question 5: A patient is started on warfarin for deep vein thrombosis. Which of
the following dietary changes would most likely result in a subtherapeutic
INR?
A. Increased consumption of green leafy vegetables
B. Increased consumption of grapefruit juice
C. Increased consumption of cranberry juice
D. Decreased consumption of vitamin K-rich foods
CORRECT ANSWER: A. Increased consumption of green leafy vegetables
Rationale: Green leafy vegetables are rich in vitamin K, which is the antidote for
warfarin. Increased intake reverses the anticoagulant effect, leading to a lower INR
(subtherapeutic).
,Question 6: A 56-year-old male with type 2 diabetes mellitus and heart failure
with reduced ejection fraction (HFrEF) is started on a new medication. Which
antihyperglycemic agent has been proven to reduce cardiovascular mortality
and hospitalization for heart failure in this population?
A. Sitagliptin
B. Pioglitazone
C. Empagliflozin
D. Glipizide
CORRECT ANSWER: C. Empagliflozin
Rationale: SGLT2 inhibitors like empagliflozin have demonstrated significant reductions
in cardiovascular death and heart failure hospitalizations in patients with type 2 diabetes
and established cardiovascular disease or HFrEF, regardless of glycemic control.
Question 7: A patient is prescribed gentamicin for a severe Pseudomonas
infection. Which of the following is the primary mechanism of action for this
antibiotic class?
A. Inhibition of cell wall synthesis
B. Inhibition of protein synthesis by binding to the 30S ribosomal subunit
C. Inhibition of DNA gyrase
D. Disruption of the bacterial cell membrane
CORRECT ANSWER: B. Inhibition of protein synthesis by binding to the 30S
ribosomal subunit
Rationale: Gentamicin is an aminoglycoside that binds irreversibly to the 30S ribosomal
subunit, causing misreading of mRNA and ultimately inhibiting bacterial protein
synthesis. This is bactericidal.
Question 8: A 28-year-old female with generalized anxiety disorder (GAD) is
prescribed buspirone. The patient asks why this medication is not a
benzodiazepine. What is the most appropriate explanation regarding the
mechanism of buspirone?
A. It potentiates GABA at the GABA-A receptor.
B. It acts as a partial agonist at 5-HT1A receptors.
C. It blocks dopamine D2 receptors in the mesolimbic pathway.
D. It inhibits the reuptake of serotonin and norepinephrine.
CORRECT ANSWER: B. It acts as a partial agonist at 5-HT1A receptors.
Rationale: Buspirone is a non-benzodiazepine anxiolytic. Its primary mechanism is as a
partial agonist at serotonin 5-HT1A receptors. It does not have the GABA-ergic activity
associated with benzodiazepines, nor does it carry the same risk of dependence.
, Question 9: A 65-year-old patient with chronic obstructive pulmonary disease
(COPD) and a history of narrow-angle glaucoma is prescribed a medication for
his COPD. Which of the following medications is contraindicated in this
patient?
A. Albuterol
B. Tiotropium
C. Budesonide
D. Roflumilast
CORRECT ANSWER: B. Tiotropium
Rationale: Tiotropium is a long-acting anticholinergic (LAMA). Anticholinergics can
precipitate acute angle-closure glaucoma in patients with narrow angles due to
mydriasis and obstruction of aqueous humor outflow.
Question 10: A patient is receiving a continuous infusion of heparin. Which of
the following laboratory values is most appropriate to monitor for dose
adjustment to achieve therapeutic anticoagulation?
A. Prothrombin time (PT)
B. Activated partial thromboplastin time (aPTT)
C. International Normalized Ratio (INR)
D. Platelet count
CORRECT ANSWER: B. Activated partial thromboplastin time (aPTT)
Rationale: Heparin primarily affects the intrinsic pathway of the coagulation cascade.
aPTT is the standard test used to monitor unfractionated heparin therapy. PT/INR is
used for warfarin monitoring.
Question 11: A 72-year-old male with Alzheimer's disease is prescribed
donepezil. The patient's family reports that he has been experiencing vivid
nightmares and insomnia. What is the most likely underlying cause of these
adverse effects?
A. Antagonism of NMDA receptors
B. Overstimulation of central cholinergic pathways
C. Inhibition of acetylcholinesterase in the peripheral nervous system
D. Activation of dopamine D2 receptors in the limbic system
CORRECT ANSWER: B. Overstimulation of central cholinergic pathways
