NR 565 Final Exam Advanced Pharmacology Actual 2026/2027 with
Detailed Rationales | Complete Exam-Style Questions | Pass
Guaranteed – A+ Graded (Chamberlain)
EXAM INFORMATION
Total Questions: 50
Recommended Time: 75 Minutes
Passing Threshold: 80%
Exam Format: Multiple Choice Questions (MCQs)
Question Style: Scenario-Based, Applied, and Clinical Decision-Making Questions
Difficulty Level: Advanced (Chamberlain)
==============================
SECTION 1: Pharmacokinetics, Pharmacodynamics, and Pharmacogenomics
Question 1
A 58-year-old male with cirrhosis presents with a serum albumin of 2.8 g/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 atrial fibrillation has been stable on warfarin with an INR of
2.5. After starting trimethoprim-sulfamethoxazole for a urinary tract infection, the INR
increases to 4.2. The patient has no signs of bleeding.
A. Trimethoprim-sulfamethoxazole increases warfarin absorption from the
gastrointestinal tract
B. Inhibition of CYP2C9 metabolism and displacement of warfarin from protein binding
sites
C. Sulfamethoxazole increases intestinal synthesis of vitamin K
D. Trimethoprim reduces renal excretion of the inactive warfarin metabolites
Correct Answer: B
Rationale: Trimethoprim-sulfamethoxazole inhibits the CYP2C9 enzyme responsible for
metabolizing the more potent S-warfarin isomer. Additionally, sulfonamides can
displace warfarin from albumin binding sites, transiently increasing free warfarin.
Option A is incorrect because warfarin absorption is not significantly altered. Option C is
incorrect because sulfonamides do not increase vitamin K synthesis. Option D is
incorrect because renal excretion of metabolites is not the primary mechanism.
, 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
Detailed Rationales | Complete Exam-Style Questions | Pass
Guaranteed – A+ Graded (Chamberlain)
EXAM INFORMATION
Total Questions: 50
Recommended Time: 75 Minutes
Passing Threshold: 80%
Exam Format: Multiple Choice Questions (MCQs)
Question Style: Scenario-Based, Applied, and Clinical Decision-Making Questions
Difficulty Level: Advanced (Chamberlain)
==============================
SECTION 1: Pharmacokinetics, Pharmacodynamics, and Pharmacogenomics
Question 1
A 58-year-old male with cirrhosis presents with a serum albumin of 2.8 g/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 atrial fibrillation has been stable on warfarin with an INR of
2.5. After starting trimethoprim-sulfamethoxazole for a urinary tract infection, the INR
increases to 4.2. The patient has no signs of bleeding.
A. Trimethoprim-sulfamethoxazole increases warfarin absorption from the
gastrointestinal tract
B. Inhibition of CYP2C9 metabolism and displacement of warfarin from protein binding
sites
C. Sulfamethoxazole increases intestinal synthesis of vitamin K
D. Trimethoprim reduces renal excretion of the inactive warfarin metabolites
Correct Answer: B
Rationale: Trimethoprim-sulfamethoxazole inhibits the CYP2C9 enzyme responsible for
metabolizing the more potent S-warfarin isomer. Additionally, sulfonamides can
displace warfarin from albumin binding sites, transiently increasing free warfarin.
Option A is incorrect because warfarin absorption is not significantly altered. Option C is
incorrect because sulfonamides do not increase vitamin K synthesis. Option D is
incorrect because renal excretion of metabolites is not the primary mechanism.
, 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
