NR 565 Advanced Pharmacology Final Exam Actual
2026/2027 with Detailed Rationales | Complete Exam-Style
Questions | Pass Guaranteed – A+ Graded
EXAM INFORMATION
Total Questions: 70
Recommended Time: 105 Minutes
Passing Threshold: 85%
Exam Format: Multiple Choice Questions (MCQs)
Question Style: Scenario-Based, Applied, and Clinical Decision-Making Questions
Difficulty Level: Advanced
==============================
SECTION 1: Pharmacokinetics, Pharmacodynamics, and Pharmacogenomics
Question 1
A 62-year-old male with cirrhosis presents with a serum albumin of 2.8 g per dL. He is
prescribed phenytoin for seizure prophylaxis following a traumatic brain injury. The
nurse practitioner recognizes that dosage adjustment is required due to altered protein
binding.
A. Increase the phenytoin dose by 50 percent to achieve therapeutic total levels
B. Monitor free phenytoin levels and reduce the total daily dose accordingly
C. No dosage adjustment is necessary because hepatic metabolism is unaffected
D. Switch to valproic acid because it is not protein bound
,Correct Answer: B
Rationale: Phenytoin is highly protein bound (approximately 90 percent). In patients with
hypoalbuminemia, the free fraction of phenytoin increases, leading to greater
pharmacologic effect at lower total serum concentrations. The practitioner should
monitor free phenytoin levels and reduce the total dose to avoid toxicity. Option A would
cause toxicity. Option C is incorrect because hepatic impairment and hypoalbuminemia
significantly alter phenytoin pharmacokinetics. Option D is incorrect because valproic
acid is also highly protein bound.
Question 2
A patient with CYP2D6 poor metabolizer status is prescribed codeine 30 mg every 4
hours as needed for postoperative pain following knee arthroplasty. After 24 hours, the
patient reports pain remains at 8 out of 10.
A. The patient is at increased risk for respiratory depression due to accumulation of
codeine
B. Inadequate analgesia is expected due to reduced conversion of codeine to morphine
C. The patient will experience increased sedation due to active metabolite accumulation
D. CYP2D6 status has no clinical significance for codeine analgesic efficacy
Correct Answer: B
Rationale: Codeine is a prodrug that requires metabolism by CYP2D6 to its active
metabolite, morphine. Poor metabolizers have significantly reduced or absent CYP2D6
activity, resulting in minimal morphine conversion and inadequate analgesia. Option A is
,incorrect because codeine itself has weak opioid activity and does not accumulate to
cause respiratory depression in poor metabolizers. Option C is incorrect because active
metabolites do not accumulate. Option D is incorrect because CYP2D6 genotype
directly determines codeine efficacy.
Question 3
A 68-year-old patient with nonvalvular atrial fibrillation has a CHA2DS2-VASc score of 4
and has been taking warfarin. The INR today is 1.4. The patient has no signs of
bleeding.
A. The patient is at increased risk for major bleeding
B. The patient is at increased risk for thromboembolic stroke
C. The subtherapeutic INR has no clinical significance
D. The patient is at increased risk for digoxin toxicity
Correct Answer: B
Rationale: An INR below 2.0 in a patient with atrial fibrillation indicates subtherapeutic
anticoagulation, significantly increasing the risk of thromboembolic stroke. The
CHA2DS2-VASc score of 4 indicates high baseline stroke risk. Option A is incorrect
because bleeding risk increases with supratherapeutic INR, not subtherapeutic. Option
C is incorrect because subtherapeutic INR is clinically significant. Option D is irrelevant
because digoxin is not mentioned.
, Question 4
A patient with severe hepatic cirrhosis requires nitroglycerin for acute anginal episodes.
The prescriber wants to avoid first-pass hepatic metabolism.
A. Oral propranolol 40 mg daily
B. Sublingual nitroglycerin 0.4 mg as needed
C. Oral metoprolol succinate 50 mg daily
D. Oral morphine sulfate 15 mg every 4 hours as needed
Correct Answer: B
Rationale: Sublingual administration of nitroglycerin bypasses the hepatic first-pass
effect because the drug is absorbed directly into the systemic circulation via the
sublingual vasculature. Options A, C, and D are all oral medications subject to first-pass
metabolism, making them inappropriate choices when the goal is to avoid hepatic
extraction.
Question 5
A drug has a volume of distribution of 0.15 L per kg, while another drug has a volume of
distribution of 5 L per kg. Both drugs are removed by hemodialysis. Which drug will be
more significantly affected by dialysis?
A. The drug with a volume of distribution of 5 L per kg
B. The drug with a volume of distribution of 0.15 L per kg
C. Both drugs will be equally affected by hemodialysis
2026/2027 with Detailed Rationales | Complete Exam-Style
Questions | Pass Guaranteed – A+ Graded
EXAM INFORMATION
Total Questions: 70
Recommended Time: 105 Minutes
Passing Threshold: 85%
Exam Format: Multiple Choice Questions (MCQs)
Question Style: Scenario-Based, Applied, and Clinical Decision-Making Questions
Difficulty Level: Advanced
==============================
SECTION 1: Pharmacokinetics, Pharmacodynamics, and Pharmacogenomics
Question 1
A 62-year-old male with cirrhosis presents with a serum albumin of 2.8 g per dL. He is
prescribed phenytoin for seizure prophylaxis following a traumatic brain injury. The
nurse practitioner recognizes that dosage adjustment is required due to altered protein
binding.
A. Increase the phenytoin dose by 50 percent to achieve therapeutic total levels
B. Monitor free phenytoin levels and reduce the total daily dose accordingly
C. No dosage adjustment is necessary because hepatic metabolism is unaffected
D. Switch to valproic acid because it is not protein bound
,Correct Answer: B
Rationale: Phenytoin is highly protein bound (approximately 90 percent). In patients with
hypoalbuminemia, the free fraction of phenytoin increases, leading to greater
pharmacologic effect at lower total serum concentrations. The practitioner should
monitor free phenytoin levels and reduce the total dose to avoid toxicity. Option A would
cause toxicity. Option C is incorrect because hepatic impairment and hypoalbuminemia
significantly alter phenytoin pharmacokinetics. Option D is incorrect because valproic
acid is also highly protein bound.
Question 2
A patient with CYP2D6 poor metabolizer status is prescribed codeine 30 mg every 4
hours as needed for postoperative pain following knee arthroplasty. After 24 hours, the
patient reports pain remains at 8 out of 10.
A. The patient is at increased risk for respiratory depression due to accumulation of
codeine
B. Inadequate analgesia is expected due to reduced conversion of codeine to morphine
C. The patient will experience increased sedation due to active metabolite accumulation
D. CYP2D6 status has no clinical significance for codeine analgesic efficacy
Correct Answer: B
Rationale: Codeine is a prodrug that requires metabolism by CYP2D6 to its active
metabolite, morphine. Poor metabolizers have significantly reduced or absent CYP2D6
activity, resulting in minimal morphine conversion and inadequate analgesia. Option A is
,incorrect because codeine itself has weak opioid activity and does not accumulate to
cause respiratory depression in poor metabolizers. Option C is incorrect because active
metabolites do not accumulate. Option D is incorrect because CYP2D6 genotype
directly determines codeine efficacy.
Question 3
A 68-year-old patient with nonvalvular atrial fibrillation has a CHA2DS2-VASc score of 4
and has been taking warfarin. The INR today is 1.4. The patient has no signs of
bleeding.
A. The patient is at increased risk for major bleeding
B. The patient is at increased risk for thromboembolic stroke
C. The subtherapeutic INR has no clinical significance
D. The patient is at increased risk for digoxin toxicity
Correct Answer: B
Rationale: An INR below 2.0 in a patient with atrial fibrillation indicates subtherapeutic
anticoagulation, significantly increasing the risk of thromboembolic stroke. The
CHA2DS2-VASc score of 4 indicates high baseline stroke risk. Option A is incorrect
because bleeding risk increases with supratherapeutic INR, not subtherapeutic. Option
C is incorrect because subtherapeutic INR is clinically significant. Option D is irrelevant
because digoxin is not mentioned.
, Question 4
A patient with severe hepatic cirrhosis requires nitroglycerin for acute anginal episodes.
The prescriber wants to avoid first-pass hepatic metabolism.
A. Oral propranolol 40 mg daily
B. Sublingual nitroglycerin 0.4 mg as needed
C. Oral metoprolol succinate 50 mg daily
D. Oral morphine sulfate 15 mg every 4 hours as needed
Correct Answer: B
Rationale: Sublingual administration of nitroglycerin bypasses the hepatic first-pass
effect because the drug is absorbed directly into the systemic circulation via the
sublingual vasculature. Options A, C, and D are all oral medications subject to first-pass
metabolism, making them inappropriate choices when the goal is to avoid hepatic
extraction.
Question 5
A drug has a volume of distribution of 0.15 L per kg, while another drug has a volume of
distribution of 5 L per kg. Both drugs are removed by hemodialysis. Which drug will be
more significantly affected by dialysis?
A. The drug with a volume of distribution of 5 L per kg
B. The drug with a volume of distribution of 0.15 L per kg
C. Both drugs will be equally affected by hemodialysis
