Walden University NURS-6521N Final Exam Pharm Actual Exam 2026/2027:
Complete Exam-Style Questions with Detailed Rationales | 100% Verified | Pass
Guaranteed – A+ Graded
TABLE OF CONTENTS
Section 1 | Pharmacokinetics, Pharmacodynamics & Drug Interactions | Q1 – Q10
Section 2 | Anti-Infective & Immunologic Agents | Q11 – Q20
Section 3 | Cardiovascular, Renal & Hematologic Drugs | Q21 – Q30
Section 4 | Endocrine, Neurologic & Psychopharmacology | Q31 – Q40
Section 5 | Special Populations, Safety & Prescribing Principles | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: PHARMACOKINETICS, PHARMACODYNAMICS & DRUG INTERACTIONS Q1
– Q10
══════════════════════════════════════
Question 1 of 50
A 68-year-old client with chronic kidney disease and a creatinine clearance of 28
mL/min is prescribed levofloxacin 750 mg daily for pneumonia. The nurse practitioner
reviews the pharmacokinetic profile and recognizes that:
A. The dose should be increased because renal impairment enhances drug elimination
B. The dose should be reduced because renal clearance is decreased and drug
accumulation will occur ✓ CORRECT
C. The standard dose is appropriate because levofloxacin is primarily hepatically
metabolized
D. The dose should be given twice daily to maintain therapeutic trough levels
Correct Answer: B
Rationale: Levofloxacin is predominantly renally eliminated, and decreased creatinine
clearance significantly prolongs its half-life, increasing the risk of QT prolongation and
,tendon rupture with standard dosing. Dose reduction or extended interval dosing is
required in renal impairment. Increasing the dose or frequency would worsen toxicity,
and levofloxacin is not primarily hepatically metabolized.
Question 2 of 50
A 55-year-old client taking warfarin for atrial fibrillation is started on amiodarone for
ventricular arrhythmias. Two weeks later, the INR is 5.2, up from a baseline of 2.3. The
nurse practitioner should recognize that this interaction occurs because amiodarone:
A. Induces hepatic CYP2C9 enzymes, increasing warfarin metabolism
B. Inhibits hepatic CYP2C9 and CYP1A2 enzymes, decreasing warfarin clearance ✓
CORRECT
C. Displaces warfarin from albumin binding sites, increasing free drug concentration
D. Accelerates renal excretion of the inactive R-warfarin enantiomer
Correct Answer: B
Rationale: Amiodarone is a potent inhibitor of multiple cytochrome P450 enzymes
including CYP2C9 and CYP1A2, which are responsible for metabolizing S-warfarin and
R-warfarin respectively, leading to decreased clearance and increased INR. It does not
induce these enzymes, and while displacement from albumin can occur with some
drugs, the primary mechanism with amiodarone is metabolic inhibition.
Question 3 of 50
A 42-year-old client with major depressive disorder is prescribed fluoxetine 20 mg daily.
After 3 weeks, the client reports improved mood but new-onset anxiety and insomnia.
The nurse practitioner explains that these symptoms are likely related to:
A. The delayed onset of fluoxetine's therapeutic effect on serotonin reuptake
B. Fluoxetine's active metabolite norfluoxetine accumulating due to its long half-life ✓
CORRECT
C. A paradoxical reaction indicating the need to discontinue the antidepressant
D. The development of serotonin syndrome requiring immediate hospitalization
, Correct Answer: B
Rationale: Fluoxetine has a half-life of 1 to 3 days, but its active metabolite norfluoxetine
has a half-life of 4 to 16 days, leading to gradual accumulation and potential activation
side effects such as anxiety and insomnia early in treatment. These are common initial
side effects rather than paradoxical reactions or serotonin syndrome, which would
present with hyperthermia, clonus, and autonomic instability.
Question 4 of 50
A 35-year-old client with epilepsy taking phenytoin is prescribed isoniazid for latent
tuberculosis. The nurse practitioner should monitor for which potential interaction?
A. Decreased phenytoin levels due to isoniazid-induced hepatic enzyme induction
B. Increased phenytoin levels due to isoniazid inhibiting phenytoin metabolism ✓
CORRECT
C. Decreased isoniazid absorption due to phenytoin altering gastric pH
D. No interaction because phenytoin and isoniazid are metabolized by different enzyme
systems
Correct Answer: B
Rationale: Isoniazid inhibits hepatic microsomal enzymes that metabolize phenytoin,
leading to increased phenytoin levels and risk of neurotoxicity including nystagmus,
ataxia, and confusion. Phenytoin is actually an enzyme inducer, not an inhibitor, and the
two drugs do interact through shared hepatic metabolism.
Question 5 of 50
A 60-year-old client with osteoarthritis is taking ibuprofen 800 mg three times daily and
is started on lisinopril for newly diagnosed hypertension. The nurse practitioner should
counsel the client that this combination:
A. Enhances the antihypertensive effect of lisinopril through prostaglandin inhibition
Complete Exam-Style Questions with Detailed Rationales | 100% Verified | Pass
Guaranteed – A+ Graded
TABLE OF CONTENTS
Section 1 | Pharmacokinetics, Pharmacodynamics & Drug Interactions | Q1 – Q10
Section 2 | Anti-Infective & Immunologic Agents | Q11 – Q20
Section 3 | Cardiovascular, Renal & Hematologic Drugs | Q21 – Q30
Section 4 | Endocrine, Neurologic & Psychopharmacology | Q31 – Q40
Section 5 | Special Populations, Safety & Prescribing Principles | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: PHARMACOKINETICS, PHARMACODYNAMICS & DRUG INTERACTIONS Q1
– Q10
══════════════════════════════════════
Question 1 of 50
A 68-year-old client with chronic kidney disease and a creatinine clearance of 28
mL/min is prescribed levofloxacin 750 mg daily for pneumonia. The nurse practitioner
reviews the pharmacokinetic profile and recognizes that:
A. The dose should be increased because renal impairment enhances drug elimination
B. The dose should be reduced because renal clearance is decreased and drug
accumulation will occur ✓ CORRECT
C. The standard dose is appropriate because levofloxacin is primarily hepatically
metabolized
D. The dose should be given twice daily to maintain therapeutic trough levels
Correct Answer: B
Rationale: Levofloxacin is predominantly renally eliminated, and decreased creatinine
clearance significantly prolongs its half-life, increasing the risk of QT prolongation and
,tendon rupture with standard dosing. Dose reduction or extended interval dosing is
required in renal impairment. Increasing the dose or frequency would worsen toxicity,
and levofloxacin is not primarily hepatically metabolized.
Question 2 of 50
A 55-year-old client taking warfarin for atrial fibrillation is started on amiodarone for
ventricular arrhythmias. Two weeks later, the INR is 5.2, up from a baseline of 2.3. The
nurse practitioner should recognize that this interaction occurs because amiodarone:
A. Induces hepatic CYP2C9 enzymes, increasing warfarin metabolism
B. Inhibits hepatic CYP2C9 and CYP1A2 enzymes, decreasing warfarin clearance ✓
CORRECT
C. Displaces warfarin from albumin binding sites, increasing free drug concentration
D. Accelerates renal excretion of the inactive R-warfarin enantiomer
Correct Answer: B
Rationale: Amiodarone is a potent inhibitor of multiple cytochrome P450 enzymes
including CYP2C9 and CYP1A2, which are responsible for metabolizing S-warfarin and
R-warfarin respectively, leading to decreased clearance and increased INR. It does not
induce these enzymes, and while displacement from albumin can occur with some
drugs, the primary mechanism with amiodarone is metabolic inhibition.
Question 3 of 50
A 42-year-old client with major depressive disorder is prescribed fluoxetine 20 mg daily.
After 3 weeks, the client reports improved mood but new-onset anxiety and insomnia.
The nurse practitioner explains that these symptoms are likely related to:
A. The delayed onset of fluoxetine's therapeutic effect on serotonin reuptake
B. Fluoxetine's active metabolite norfluoxetine accumulating due to its long half-life ✓
CORRECT
C. A paradoxical reaction indicating the need to discontinue the antidepressant
D. The development of serotonin syndrome requiring immediate hospitalization
, Correct Answer: B
Rationale: Fluoxetine has a half-life of 1 to 3 days, but its active metabolite norfluoxetine
has a half-life of 4 to 16 days, leading to gradual accumulation and potential activation
side effects such as anxiety and insomnia early in treatment. These are common initial
side effects rather than paradoxical reactions or serotonin syndrome, which would
present with hyperthermia, clonus, and autonomic instability.
Question 4 of 50
A 35-year-old client with epilepsy taking phenytoin is prescribed isoniazid for latent
tuberculosis. The nurse practitioner should monitor for which potential interaction?
A. Decreased phenytoin levels due to isoniazid-induced hepatic enzyme induction
B. Increased phenytoin levels due to isoniazid inhibiting phenytoin metabolism ✓
CORRECT
C. Decreased isoniazid absorption due to phenytoin altering gastric pH
D. No interaction because phenytoin and isoniazid are metabolized by different enzyme
systems
Correct Answer: B
Rationale: Isoniazid inhibits hepatic microsomal enzymes that metabolize phenytoin,
leading to increased phenytoin levels and risk of neurotoxicity including nystagmus,
ataxia, and confusion. Phenytoin is actually an enzyme inducer, not an inhibitor, and the
two drugs do interact through shared hepatic metabolism.
Question 5 of 50
A 60-year-old client with osteoarthritis is taking ibuprofen 800 mg three times daily and
is started on lisinopril for newly diagnosed hypertension. The nurse practitioner should
counsel the client that this combination:
A. Enhances the antihypertensive effect of lisinopril through prostaglandin inhibition
