NR568 FINAL EXAM 2026/2027 | Advanced
Pharmacology AGPCNP| Latest Questions and
Rationales
SECTION 1: PHARMACOKINETICS IN AGING (Q1–15)
Q1. Which age-related change most significantly prolongs the half-life of lipophilic drugs like
diazepam?
A. Decreased gastric acid production
B. Increased body fat and decreased lean muscle mass
C. Increased hepatic blood flow
D. Increased glomerular filtration rate
Answer: B
Rationale: Aging increases body fat percentage and decreases lean body mass, expanding the
volume of distribution for lipophilic drugs. Diazepam's half-life can exceed 100 hours in older
adults versus ~24 hours in younger adults.
Q2. A 78-year-old patient on warfarin has a normal total drug level but develops bruising.
Which age-related change explains this?
A. Increased albumin levels
B. Decreased albumin levels increasing free drug
C. Increased renal clearance
D. Decreased body fat
Answer: B
Rationale: Hypoalbuminemia from malnutrition or chronic illness increases free (active) drug
levels for highly protein-bound drugs like warfarin, increasing toxicity risk even when total levels
appear therapeutic.
Q3. Which phase of hepatic metabolism is most affected by aging?
A. Phase I (CYP450 oxidative)
B. Phase II (conjugation)
C. Phase III (transport)
D. All phases equally
Answer: A
Rationale: Phase I (CYP450 oxidative) metabolism decreases with aging due to reduced hepatic
blood flow and enzyme activity. Phase II conjugation is relatively preserved.
,Q4. Which drug requires the most cautious dosing in an 80-year-old with a GFR of 45 mL/min?
A. Amoxicillin
B. Digoxin
C. Acetaminophen
D. Loratadine
Answer: B
Rationale: Digoxin is primarily renally cleared. Declining GFR reduces renal clearance,
prolonging half-life and increasing toxicity risk.
Q5. What is the primary concern when a 75-year-old patient on ketoconazole is also taking
omeprazole?
A. Increased ketoconazole absorption
B. Decreased ketoconazole absorption
C. No interaction
D. Increased omeprazole absorption
Answer: B
Rationale: Aging increases gastric pH due to reduced acid production. Concurrent PPI use
further raises pH, decreasing absorption of drugs requiring an acidic environment (e.g.,
ketoconazole).
Q6. Which statement about polypharmacy in older adults is correct?
A. It only refers to prescription medications
B. It includes prescription, OTC, and herbal products
C. It has no effect on drug interactions
D. It is always appropriate
Answer: B
Rationale: Polypharmacy includes prescription, OTC, and herbal products. A complete
medication reconciliation is essential.
Q7. A 72-year-old patient reports new confusion after a medication change. What should be
assessed first?
A. The complete medication list, including prescription, OTC, and herbal products
B. Only prescription medications
C. Only medications taken in the morning
D. The patient's favorite foods
Answer: A
Rationale: A complete medication list should be assessed first to identify potential drug
interactions or adverse effects.
, Q8. Which age-related change increases the risk of drug toxicity?
A. Increased hepatic blood flow
B. Decreased glomerular filtration rate
C. Increased gastric acid production
D. Increased lean body mass
Answer: B
Rationale: Aging is associated with a decline in GFR, which reduces renal clearance of
medications.
Q9. What is the Beers Criteria?
A. A list of medications to avoid in older adults
B. A list of medications to avoid in children
C. A list of medications to avoid in pregnancy
D. A list of medications to avoid in renal failure
Answer: A
Rationale: The Beers Criteria identifies potentially inappropriate medications for older adults.
Q10. Which medication is on the Beers Criteria list for older adults?
A. Diazepam
B. Lisinopril
C. Metformin
D. Levothyroxine
Answer: A
Rationale: Diazepam is a long-acting benzodiazepine that is potentially inappropriate in older
adults due to prolonged half-life and fall risk.
Q11. What is the START/STOPP criteria?
A. A tool to optimize prescribing in older adults
B. A tool to diagnose hypertension
C. A tool to assess renal function
D. A tool to evaluate thyroid function
Answer: A
Rationale: START/STOPP is a screening tool for potentially inappropriate prescribing in older
adults.
Q12. A 70-year-old patient has a creatinine clearance of 35 mL/min. Which medication
requires dose adjustment?
A. Lisinopril
Pharmacology AGPCNP| Latest Questions and
Rationales
SECTION 1: PHARMACOKINETICS IN AGING (Q1–15)
Q1. Which age-related change most significantly prolongs the half-life of lipophilic drugs like
diazepam?
A. Decreased gastric acid production
B. Increased body fat and decreased lean muscle mass
C. Increased hepatic blood flow
D. Increased glomerular filtration rate
Answer: B
Rationale: Aging increases body fat percentage and decreases lean body mass, expanding the
volume of distribution for lipophilic drugs. Diazepam's half-life can exceed 100 hours in older
adults versus ~24 hours in younger adults.
Q2. A 78-year-old patient on warfarin has a normal total drug level but develops bruising.
Which age-related change explains this?
A. Increased albumin levels
B. Decreased albumin levels increasing free drug
C. Increased renal clearance
D. Decreased body fat
Answer: B
Rationale: Hypoalbuminemia from malnutrition or chronic illness increases free (active) drug
levels for highly protein-bound drugs like warfarin, increasing toxicity risk even when total levels
appear therapeutic.
Q3. Which phase of hepatic metabolism is most affected by aging?
A. Phase I (CYP450 oxidative)
B. Phase II (conjugation)
C. Phase III (transport)
D. All phases equally
Answer: A
Rationale: Phase I (CYP450 oxidative) metabolism decreases with aging due to reduced hepatic
blood flow and enzyme activity. Phase II conjugation is relatively preserved.
,Q4. Which drug requires the most cautious dosing in an 80-year-old with a GFR of 45 mL/min?
A. Amoxicillin
B. Digoxin
C. Acetaminophen
D. Loratadine
Answer: B
Rationale: Digoxin is primarily renally cleared. Declining GFR reduces renal clearance,
prolonging half-life and increasing toxicity risk.
Q5. What is the primary concern when a 75-year-old patient on ketoconazole is also taking
omeprazole?
A. Increased ketoconazole absorption
B. Decreased ketoconazole absorption
C. No interaction
D. Increased omeprazole absorption
Answer: B
Rationale: Aging increases gastric pH due to reduced acid production. Concurrent PPI use
further raises pH, decreasing absorption of drugs requiring an acidic environment (e.g.,
ketoconazole).
Q6. Which statement about polypharmacy in older adults is correct?
A. It only refers to prescription medications
B. It includes prescription, OTC, and herbal products
C. It has no effect on drug interactions
D. It is always appropriate
Answer: B
Rationale: Polypharmacy includes prescription, OTC, and herbal products. A complete
medication reconciliation is essential.
Q7. A 72-year-old patient reports new confusion after a medication change. What should be
assessed first?
A. The complete medication list, including prescription, OTC, and herbal products
B. Only prescription medications
C. Only medications taken in the morning
D. The patient's favorite foods
Answer: A
Rationale: A complete medication list should be assessed first to identify potential drug
interactions or adverse effects.
, Q8. Which age-related change increases the risk of drug toxicity?
A. Increased hepatic blood flow
B. Decreased glomerular filtration rate
C. Increased gastric acid production
D. Increased lean body mass
Answer: B
Rationale: Aging is associated with a decline in GFR, which reduces renal clearance of
medications.
Q9. What is the Beers Criteria?
A. A list of medications to avoid in older adults
B. A list of medications to avoid in children
C. A list of medications to avoid in pregnancy
D. A list of medications to avoid in renal failure
Answer: A
Rationale: The Beers Criteria identifies potentially inappropriate medications for older adults.
Q10. Which medication is on the Beers Criteria list for older adults?
A. Diazepam
B. Lisinopril
C. Metformin
D. Levothyroxine
Answer: A
Rationale: Diazepam is a long-acting benzodiazepine that is potentially inappropriate in older
adults due to prolonged half-life and fall risk.
Q11. What is the START/STOPP criteria?
A. A tool to optimize prescribing in older adults
B. A tool to diagnose hypertension
C. A tool to assess renal function
D. A tool to evaluate thyroid function
Answer: A
Rationale: START/STOPP is a screening tool for potentially inappropriate prescribing in older
adults.
Q12. A 70-year-old patient has a creatinine clearance of 35 mL/min. Which medication
requires dose adjustment?
A. Lisinopril
