NR 568 Final Exam — Advanced Pharmacology for the AGPCNP (2026/2027) Chamberlain University
NR 568 / NR568 Final Exam (Latest Update )
Advanced Pharmacology for the Adult-Gerontology Primary
Care Nurse Practitioner
Questions with Answers & Comprehensive AGPCNP Rationales — A+ Guarantee
Chamberlain University | 100 Questions | Cognitive Distribution: 30% Recall, 50% Application, 20% Analysis | Style: 70%
Scenario-based, 20% Direct Recall, 10% Clinical Analysis
Examination Instructions: This comprehensive final examination contains 100 multiple-choice questions across nine content
domains aligned with the 2026–2027 Chamberlain University NR 568 curriculum and AGPCNP pharmacology competencies. Each
question has ONE best answer. Read each stem carefully, consider all four options, and select the response that reflects current
evidence-based pharmacology and adult-gerontology primary care practice. Rationales are provided after each question, explaining
both why the correct answer is correct and why the distractors are incorrect — including pharmacodynamics, pharmacokinetics,
drug interactions, contraindications, and monitoring parameters.
Section 1: Pharmacokinetics & Pharmacodynamics in Aging Adults
Tests aging-related pharmacokinetic changes (absorption, distribution, metabolism, excretion), polypharmacy, Beers Criteria, and
START/STOPP criteria for appropriate geriatric prescribing.
Q1: An 82-year-old patient is taking ketoconazole for a fungal infection. The patient has been prescribed a proton
pump inhibitor (PPI) for gastroesophageal reflux disease. The NP understands that the increased gastric pH caused
by the PPI will most likely result in which pharmacokinetic change in the older adult?
A. Increased absorption of ketoconazole due to faster gastric emptying
B. Decreased absorption of ketoconazole because it requires an acidic environment for dissolution
[CORRECT]
C. No change in absorption because aging does not affect gastric pH
D. Increased first-pass metabolism of ketoconazole due to higher gastric pH
Correct Answer: B
Rationale:
Aging is associated with increased gastric pH (due to reduced acid production and atrophic gastritis), and concurrent PPI use further raises
pH. Ketoconazole and other drugs requiring an acidic environment for dissolution have significantly decreased absorption in this setting.
Decreased GI motility and reduced splanchnic blood flow in older adults also slow absorption, although for most drugs the net effect on
absorption is clinically minor compared to distribution/metabolism/excretion changes. The NP should consider switching to fluconazole
(whose absorption is pH-independent) or spacing the PPI dosing appropriately.
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,NR 568 Final Exam — Advanced Pharmacology for the AGPCNP (2026/2027) Chamberlain University
Q2: A 78-year-old woman is prescribed diazepam for intermittent anxiety. The NP is concerned about drug
accumulation. Which pharmacokinetic change in aging most directly contributes to the prolonged half-life and
accumulation of lipophilic drugs like diazepam in older adults?
A. Decreased total body water leading to higher peak concentration
B. Increased body fat percentage, which expands the volume of distribution for lipophilic drugs and prolongs
their half-life [CORRECT]
C. Decreased serum albumin causing elevated free drug levels
D. Increased renal clearance compensating for hepatic changes
Correct Answer: B
Rationale:
Aging increases body fat percentage while decreasing lean body mass and total body water. Lipophilic drugs such as diazepam, fluoxetine,
and amiodarone distribute extensively into adipose tissue, expanding their volume of distribution (Vd) and dramatically prolonging half-life
(t½ = 0.693 × Vd / Cl). Diazepam's half-life can exceed 100 hours in older adults versus ~24 hours in younger adults, leading to
accumulation, sedation, falls, and delirium. Diazepam is on the Beers Criteria list of drugs to avoid in older adults. Options A and C
describe real but unrelated PK changes; D is incorrect because renal clearance declines with age.
Q3: A 75-year-old patient on long-term warfarin therapy is admitted with malnutrition and a serum albumin of 2.4
g/dL (normal 3.5–5.0). The NP recognizes that decreased serum albumin in this older adult will have what effect on
highly protein-bound drugs like warfarin?
A. Decreased free drug levels requiring dose increase
B. Increased free (unbound) drug levels, increasing the risk of bleeding and toxicity [CORRECT]
C. No clinically significant effect because warfarin is metabolized by the liver
D. Increased protein binding resulting in drug accumulation
Correct Answer: B
Rationale:
Warfarin is approximately 99% protein-bound to albumin. In older adults with hypoalbuminemia (from malnutrition, liver disease, or
chronic illness), fewer binding sites are available, increasing the free (pharmacologically active) fraction of the drug. This raises the risk of
bleeding even when the total warfarin dose and INR appear within range. The NP should monitor INR more frequently, consider dose
reduction, and assess nutritional status. Other highly protein-bound drugs affected include phenytoin, valproic acid, and digoxin — for
phenytoin, the NP should request free drug levels in hypoalbuminemia.
Q4: An 80-year-old patient is started on a medication that is metabolized primarily by Phase I (CYP450 oxidative)
reactions. Compared to a younger adult, how is Phase I metabolism expected to change in this older adult, and what
is the clinical implication?
A. Phase I metabolism increases, requiring higher doses for therapeutic effect
B. Phase I metabolism decreases due to reduced hepatic blood flow and CYP450 enzyme activity, requiring
lower maintenance doses [CORRECT]
C. Phase I metabolism is unaffected; only Phase II (conjugation) reactions decline
D. Phase I metabolism is preserved because CYP450 enzymes are not affected by aging
Correct Answer: B
Rationale:
Aging reduces hepatic blood flow by approximately 40% and decreases the activity of Phase I (oxidative, reductive, hydrolytic) CYP450
enzymes. Phase II conjugation reactions (glucuronidation, sulfonation) are relatively preserved. The clinical implication is that drugs relying
on Phase I metabolism — such as diazepam, alprazolam, theophylline, and quinidine — have reduced clearance and prolonged half-life,
often requiring lower maintenance doses or longer dosing intervals in older adults. The NP should also be aware that first-pass metabolism
decreases, increasing bioavailability of high-extraction drugs like propranolol and morphine.
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,NR 568 Final Exam — Advanced Pharmacology for the AGPCNP (2026/2027) Chamberlain University
Q5: A 79-year-old patient with a complicated MRSA infection is being started on IV vancomycin. The NP
understands that the patient's age-related decline in renal function will most directly affect which pharmacokinetic
parameter, and what adjustment is required?
A. Absorption — the drug should be given orally instead of IV
B. Excretion — decreased GFR reduces vancomycin clearance, requiring renal dose adjustment and therapeutic
drug monitoring of trough levels [CORRECT]
C. Distribution — increased body fat requires higher loading doses
D. Metabolism — hepatic clearance decreases, requiring longer dosing intervals
Correct Answer: B
Rationale:
Vancomycin is excreted primarily unchanged by the kidneys via glomerular filtration. GFR declines with age (approximately 1 mL/min per
year after age 40), even when serum creatinine appears normal because older adults have less muscle mass. Therefore, vancomycin — along
with penicillins, aminoglycosides, and many other renally cleared drugs — requires renal dose adjustment based on estimated CrCl
(Cockcroft-Gault) and therapeutic drug monitoring of trough levels (typically 15–20 mcg/mL for serious MRSA infections). The NP must
not rely on serum creatinine alone; estimated GFR or Cockcroft-Gault should guide dosing in older adults.
Q6: A 76-year-old woman is taking 14 prescription medications for hypertension, diabetes, atrial fibrillation,
osteoarthritis, hypothyroidism, depression, GERD, and overactive bladder. Which risk is most directly increased by
this level of polypharmacy, and what is the most appropriate NP intervention?
A. Polypharmacy decreases the risk of drug interactions because each drug acts independently
B. Polypharmacy increases the risk of drug interactions, adverse drug reactions, and non-adherence; the NP
should perform a comprehensive medication review and deprescribe inappropriate medications [CORRECT]
C. Polypharmacy is appropriate as long as each drug has a clear indication
D. Polypharmacy increases adherence because patients follow structured routines
Correct Answer: B
Rationale:
Polypharmacy (typically defined as ≥5 medications) in older adults exponentially increases the risk of drug-drug interactions, adverse drug
reactions (ADRs), geriatric syndromes (falls, delirium, incontinence), hospitalization, and non-adherence. The risk of an ADR rises from
~13% with two drugs to ~58% with five drugs and ~82% with seven or more. The NP should conduct a comprehensive medication review
using the Beers Criteria and START/STOPP criteria at every visit, deprescribe inappropriate or duplicate medications, simplify dosing
schedules using once-daily formulations when possible, and reconcile medications at every transition of care.
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, NR 568 Final Exam — Advanced Pharmacology for the AGPCNP (2026/2027) Chamberlain University
Q7: A 79-year-old man with chronic insomnia requests a prescription for temazepam. The NP recognizes that
benzodiazepines are listed on the Beers Criteria for potentially inappropriate medications in older adults. Which
adverse effect is the primary concern that drives this recommendation?
A. Hepatic failure from long-term benzodiazepine use
B. Increased risk of falls, cognitive impairment, delirium, fractures, and motor vehicle accidents due to
prolonged sedation [CORRECT]
C. Renal toxicity requiring dose adjustment
D. Cardiac arrhythmias from QT prolongation
Correct Answer: B
Rationale:
The Beers Criteria explicitly list benzodiazepines (including temazepam, lorazepam, diazepam, alprazolam) as potentially inappropriate in
older adults because of their enhanced sensitivity (increased receptor sensitivity and prolonged half-life from increased adipose
distribution), leading to falls, hip fractures, cognitive impairment, delirium, and motor vehicle accidents. The Beers Criteria recommend
avoiding benzodiazepines for the treatment of insomnia, agitation, and delirium in older adults. Preferred alternatives for insomnia include
non-pharmacologic measures (sleep hygiene, CBT-I), low-dose melatonin, or, if pharmacotherapy is required, low-dose doxepin (≤6 mg) or
zolpidem with caution.
Q8: An 81-year-old woman is prescribed oxybutynin for overactive bladder. The NP is concerned because oxybutynin
is on the Beers Criteria list due to its strong anticholinergic properties. Which adverse effect is the NP most
concerned about in this patient?
A. Hypoglycemia due to enhanced insulin sensitivity
B. Cognitive impairment, delirium, constipation, urinary retention, dry mouth, and falls due to anticholinergic
burden [CORRECT]
C. Hepatotoxicity requiring LFT monitoring
D. Bone marrow suppression requiring CBC monitoring
Correct Answer: B
Rationale:
Oxybutynin is a strong anticholinergic and is on the Beers Criteria list of potentially inappropriate medications in older adults.
Anticholinergic effects include cognitive impairment and delirium (especially in patients with underlying dementia), constipation, urinary
retention (which can worsen the very symptoms being treated), dry mouth, blurred vision, tachycardia, and falls. Cumulative anticholinergic
burden is associated with increased mortality in older adults. The NP should consider alternatives such as mirabegron (a beta-3 agonist
without anticholinergic effects), behavioral therapies (bladder training, pelvic floor exercises), or, if an antimuscarinic is necessary,
trospium or darifenacin (which have less CNS penetration).
A+ Guarantee — Verified Correct Answers with Comprehensive Rationales Page 4
NR 568 / NR568 Final Exam (Latest Update )
Advanced Pharmacology for the Adult-Gerontology Primary
Care Nurse Practitioner
Questions with Answers & Comprehensive AGPCNP Rationales — A+ Guarantee
Chamberlain University | 100 Questions | Cognitive Distribution: 30% Recall, 50% Application, 20% Analysis | Style: 70%
Scenario-based, 20% Direct Recall, 10% Clinical Analysis
Examination Instructions: This comprehensive final examination contains 100 multiple-choice questions across nine content
domains aligned with the 2026–2027 Chamberlain University NR 568 curriculum and AGPCNP pharmacology competencies. Each
question has ONE best answer. Read each stem carefully, consider all four options, and select the response that reflects current
evidence-based pharmacology and adult-gerontology primary care practice. Rationales are provided after each question, explaining
both why the correct answer is correct and why the distractors are incorrect — including pharmacodynamics, pharmacokinetics,
drug interactions, contraindications, and monitoring parameters.
Section 1: Pharmacokinetics & Pharmacodynamics in Aging Adults
Tests aging-related pharmacokinetic changes (absorption, distribution, metabolism, excretion), polypharmacy, Beers Criteria, and
START/STOPP criteria for appropriate geriatric prescribing.
Q1: An 82-year-old patient is taking ketoconazole for a fungal infection. The patient has been prescribed a proton
pump inhibitor (PPI) for gastroesophageal reflux disease. The NP understands that the increased gastric pH caused
by the PPI will most likely result in which pharmacokinetic change in the older adult?
A. Increased absorption of ketoconazole due to faster gastric emptying
B. Decreased absorption of ketoconazole because it requires an acidic environment for dissolution
[CORRECT]
C. No change in absorption because aging does not affect gastric pH
D. Increased first-pass metabolism of ketoconazole due to higher gastric pH
Correct Answer: B
Rationale:
Aging is associated with increased gastric pH (due to reduced acid production and atrophic gastritis), and concurrent PPI use further raises
pH. Ketoconazole and other drugs requiring an acidic environment for dissolution have significantly decreased absorption in this setting.
Decreased GI motility and reduced splanchnic blood flow in older adults also slow absorption, although for most drugs the net effect on
absorption is clinically minor compared to distribution/metabolism/excretion changes. The NP should consider switching to fluconazole
(whose absorption is pH-independent) or spacing the PPI dosing appropriately.
A+ Guarantee — Verified Correct Answers with Comprehensive Rationales Page 1
,NR 568 Final Exam — Advanced Pharmacology for the AGPCNP (2026/2027) Chamberlain University
Q2: A 78-year-old woman is prescribed diazepam for intermittent anxiety. The NP is concerned about drug
accumulation. Which pharmacokinetic change in aging most directly contributes to the prolonged half-life and
accumulation of lipophilic drugs like diazepam in older adults?
A. Decreased total body water leading to higher peak concentration
B. Increased body fat percentage, which expands the volume of distribution for lipophilic drugs and prolongs
their half-life [CORRECT]
C. Decreased serum albumin causing elevated free drug levels
D. Increased renal clearance compensating for hepatic changes
Correct Answer: B
Rationale:
Aging increases body fat percentage while decreasing lean body mass and total body water. Lipophilic drugs such as diazepam, fluoxetine,
and amiodarone distribute extensively into adipose tissue, expanding their volume of distribution (Vd) and dramatically prolonging half-life
(t½ = 0.693 × Vd / Cl). Diazepam's half-life can exceed 100 hours in older adults versus ~24 hours in younger adults, leading to
accumulation, sedation, falls, and delirium. Diazepam is on the Beers Criteria list of drugs to avoid in older adults. Options A and C
describe real but unrelated PK changes; D is incorrect because renal clearance declines with age.
Q3: A 75-year-old patient on long-term warfarin therapy is admitted with malnutrition and a serum albumin of 2.4
g/dL (normal 3.5–5.0). The NP recognizes that decreased serum albumin in this older adult will have what effect on
highly protein-bound drugs like warfarin?
A. Decreased free drug levels requiring dose increase
B. Increased free (unbound) drug levels, increasing the risk of bleeding and toxicity [CORRECT]
C. No clinically significant effect because warfarin is metabolized by the liver
D. Increased protein binding resulting in drug accumulation
Correct Answer: B
Rationale:
Warfarin is approximately 99% protein-bound to albumin. In older adults with hypoalbuminemia (from malnutrition, liver disease, or
chronic illness), fewer binding sites are available, increasing the free (pharmacologically active) fraction of the drug. This raises the risk of
bleeding even when the total warfarin dose and INR appear within range. The NP should monitor INR more frequently, consider dose
reduction, and assess nutritional status. Other highly protein-bound drugs affected include phenytoin, valproic acid, and digoxin — for
phenytoin, the NP should request free drug levels in hypoalbuminemia.
Q4: An 80-year-old patient is started on a medication that is metabolized primarily by Phase I (CYP450 oxidative)
reactions. Compared to a younger adult, how is Phase I metabolism expected to change in this older adult, and what
is the clinical implication?
A. Phase I metabolism increases, requiring higher doses for therapeutic effect
B. Phase I metabolism decreases due to reduced hepatic blood flow and CYP450 enzyme activity, requiring
lower maintenance doses [CORRECT]
C. Phase I metabolism is unaffected; only Phase II (conjugation) reactions decline
D. Phase I metabolism is preserved because CYP450 enzymes are not affected by aging
Correct Answer: B
Rationale:
Aging reduces hepatic blood flow by approximately 40% and decreases the activity of Phase I (oxidative, reductive, hydrolytic) CYP450
enzymes. Phase II conjugation reactions (glucuronidation, sulfonation) are relatively preserved. The clinical implication is that drugs relying
on Phase I metabolism — such as diazepam, alprazolam, theophylline, and quinidine — have reduced clearance and prolonged half-life,
often requiring lower maintenance doses or longer dosing intervals in older adults. The NP should also be aware that first-pass metabolism
decreases, increasing bioavailability of high-extraction drugs like propranolol and morphine.
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,NR 568 Final Exam — Advanced Pharmacology for the AGPCNP (2026/2027) Chamberlain University
Q5: A 79-year-old patient with a complicated MRSA infection is being started on IV vancomycin. The NP
understands that the patient's age-related decline in renal function will most directly affect which pharmacokinetic
parameter, and what adjustment is required?
A. Absorption — the drug should be given orally instead of IV
B. Excretion — decreased GFR reduces vancomycin clearance, requiring renal dose adjustment and therapeutic
drug monitoring of trough levels [CORRECT]
C. Distribution — increased body fat requires higher loading doses
D. Metabolism — hepatic clearance decreases, requiring longer dosing intervals
Correct Answer: B
Rationale:
Vancomycin is excreted primarily unchanged by the kidneys via glomerular filtration. GFR declines with age (approximately 1 mL/min per
year after age 40), even when serum creatinine appears normal because older adults have less muscle mass. Therefore, vancomycin — along
with penicillins, aminoglycosides, and many other renally cleared drugs — requires renal dose adjustment based on estimated CrCl
(Cockcroft-Gault) and therapeutic drug monitoring of trough levels (typically 15–20 mcg/mL for serious MRSA infections). The NP must
not rely on serum creatinine alone; estimated GFR or Cockcroft-Gault should guide dosing in older adults.
Q6: A 76-year-old woman is taking 14 prescription medications for hypertension, diabetes, atrial fibrillation,
osteoarthritis, hypothyroidism, depression, GERD, and overactive bladder. Which risk is most directly increased by
this level of polypharmacy, and what is the most appropriate NP intervention?
A. Polypharmacy decreases the risk of drug interactions because each drug acts independently
B. Polypharmacy increases the risk of drug interactions, adverse drug reactions, and non-adherence; the NP
should perform a comprehensive medication review and deprescribe inappropriate medications [CORRECT]
C. Polypharmacy is appropriate as long as each drug has a clear indication
D. Polypharmacy increases adherence because patients follow structured routines
Correct Answer: B
Rationale:
Polypharmacy (typically defined as ≥5 medications) in older adults exponentially increases the risk of drug-drug interactions, adverse drug
reactions (ADRs), geriatric syndromes (falls, delirium, incontinence), hospitalization, and non-adherence. The risk of an ADR rises from
~13% with two drugs to ~58% with five drugs and ~82% with seven or more. The NP should conduct a comprehensive medication review
using the Beers Criteria and START/STOPP criteria at every visit, deprescribe inappropriate or duplicate medications, simplify dosing
schedules using once-daily formulations when possible, and reconcile medications at every transition of care.
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, NR 568 Final Exam — Advanced Pharmacology for the AGPCNP (2026/2027) Chamberlain University
Q7: A 79-year-old man with chronic insomnia requests a prescription for temazepam. The NP recognizes that
benzodiazepines are listed on the Beers Criteria for potentially inappropriate medications in older adults. Which
adverse effect is the primary concern that drives this recommendation?
A. Hepatic failure from long-term benzodiazepine use
B. Increased risk of falls, cognitive impairment, delirium, fractures, and motor vehicle accidents due to
prolonged sedation [CORRECT]
C. Renal toxicity requiring dose adjustment
D. Cardiac arrhythmias from QT prolongation
Correct Answer: B
Rationale:
The Beers Criteria explicitly list benzodiazepines (including temazepam, lorazepam, diazepam, alprazolam) as potentially inappropriate in
older adults because of their enhanced sensitivity (increased receptor sensitivity and prolonged half-life from increased adipose
distribution), leading to falls, hip fractures, cognitive impairment, delirium, and motor vehicle accidents. The Beers Criteria recommend
avoiding benzodiazepines for the treatment of insomnia, agitation, and delirium in older adults. Preferred alternatives for insomnia include
non-pharmacologic measures (sleep hygiene, CBT-I), low-dose melatonin, or, if pharmacotherapy is required, low-dose doxepin (≤6 mg) or
zolpidem with caution.
Q8: An 81-year-old woman is prescribed oxybutynin for overactive bladder. The NP is concerned because oxybutynin
is on the Beers Criteria list due to its strong anticholinergic properties. Which adverse effect is the NP most
concerned about in this patient?
A. Hypoglycemia due to enhanced insulin sensitivity
B. Cognitive impairment, delirium, constipation, urinary retention, dry mouth, and falls due to anticholinergic
burden [CORRECT]
C. Hepatotoxicity requiring LFT monitoring
D. Bone marrow suppression requiring CBC monitoring
Correct Answer: B
Rationale:
Oxybutynin is a strong anticholinergic and is on the Beers Criteria list of potentially inappropriate medications in older adults.
Anticholinergic effects include cognitive impairment and delirium (especially in patients with underlying dementia), constipation, urinary
retention (which can worsen the very symptoms being treated), dry mouth, blurred vision, tachycardia, and falls. Cumulative anticholinergic
burden is associated with increased mortality in older adults. The NP should consider alternatives such as mirabegron (a beta-3 agonist
without anticholinergic effects), behavioral therapies (bladder training, pelvic floor exercises), or, if an antimuscarinic is necessary,
trospium or darifenacin (which have less CNS penetration).
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