NURS 6521N Midterm V2 | NURS 6521N
Advanced Pharmacology | Actual Q&A
with Rationale (NURS6521N Midterm) |
Walden University
1. An Advanced Practice Nurse is prescribing a medication that is known to have a high first-
pass effect. Which route of administration would most likely result in the highest
bioavailability of this drug?
A. Oral
B. Intravenous
C. Sublingual
D. Transdermal
Answer: B
Rationale: The first-pass effect refers to the rapid hepatic metabolism of a drug absorbed
from the gastrointestinal tract before it reaches the systemic circulation. Intravenous
administration bypasses the digestive system and the liver’s initial metabolism entirely,
delivering the full dose directly into the bloodstream. This ensures that 100% of the
medication is bioavailable for therapeutic effect immediately upon administration.
,2. When managing a patient on Warfarin therapy, the nurse practitioner understands that
specific dietary instructions are vital. Which of the following should the patient be advised to
maintain a consistent intake of?
A. Grapefruit juice
B. Green leafy vegetables
C. Dairy products
D. Red meat
Answer: B
Rationale: Warfarin works by inhibiting the synthesis of Vitamin K-dependent clotting
factors, making Vitamin K its natural antagonist. Significant fluctuations in Vitamin K
intake, such as those found in spinach or kale, can drastically alter the International
Normalized Ratio (INR) levels. Maintaining a steady dietary habit ensures that the
anticoagulant dose remains effective and predictable throughout the treatment course.
3. A patient is diagnosed with hypertension and is started on an ACE inhibitor. Two weeks
later, the patient returns with a persistent, dry, non-productive cough. What is the most
likely cause of this side effect?
A. Pulmonary edema
B. Localized allergic reaction
C. Bronchospasm
D. Accumulation of bradykinin
,Answer: D
Rationale: Angiotensin-Converting Enzyme (ACE) is responsible for breaking down
bradykinin in the pulmonary tissues. When this enzyme is inhibited, bradykinin levels rise,
leading to irritation of the respiratory tract and the characteristic dry cough. This is a
common class-specific side effect that often necessitates a transition to an Angiotensin II
Receptor Blocker (ARB).
4. A nurse practitioner is treating an elderly patient with multiple comorbidities and is
concerned about the risk of drug toxicity. Which physiological change associated with aging
contributes most to decreased drug clearance?
A. Increased gastric pH
B. Decreased body fat
C. Increased serum albumin levels
D. Reduced glomerular filtration rate
Answer: D
Rationale: Age-related decline in renal function is the most significant factor impacting
pharmacokinetics in geriatric populations. A reduced glomerular filtration rate (GFR) leads
to the prolongation of half-lives for drugs primarily excreted by the kidneys. Clinicians
must use formulas like Cockcroft-Gault to estimate renal clearance and adjust dosages
accordingly to prevent adverse effects.
, 5. A 55-year-old patient is taking Digoxin for heart failure. Which electrolyte imbalance
should the Advanced Practice Nurse monitor most closely due to its role in potentiating
digoxin toxicity?
A. Hypernatremia
B. Hypercalcemia
C. Hypomagnesemia
D. Hypokalemia
Answer: D
Rationale: Digoxin binds to the same site on the Na+/K+ ATPase pump as potassium ions.
When potassium levels are low, there is less competition for these binding sites, allowing
digoxin to exert an exaggerated effect. This heightened sensitivity can lead to life-
threatening arrhythmias even when serum digoxin levels are within the traditional
therapeutic range.
6. Which of the following describes the ‘steady state’ of a drug in the systemic circulation?
A. The point at which the drug is completely eliminated from the body
B. The state where the rate of drug administration equals the rate of drug elimination
C. The time it takes for the concentration to drop by half
D. The highest concentration reached after a single dose
Answer: B
Advanced Pharmacology | Actual Q&A
with Rationale (NURS6521N Midterm) |
Walden University
1. An Advanced Practice Nurse is prescribing a medication that is known to have a high first-
pass effect. Which route of administration would most likely result in the highest
bioavailability of this drug?
A. Oral
B. Intravenous
C. Sublingual
D. Transdermal
Answer: B
Rationale: The first-pass effect refers to the rapid hepatic metabolism of a drug absorbed
from the gastrointestinal tract before it reaches the systemic circulation. Intravenous
administration bypasses the digestive system and the liver’s initial metabolism entirely,
delivering the full dose directly into the bloodstream. This ensures that 100% of the
medication is bioavailable for therapeutic effect immediately upon administration.
,2. When managing a patient on Warfarin therapy, the nurse practitioner understands that
specific dietary instructions are vital. Which of the following should the patient be advised to
maintain a consistent intake of?
A. Grapefruit juice
B. Green leafy vegetables
C. Dairy products
D. Red meat
Answer: B
Rationale: Warfarin works by inhibiting the synthesis of Vitamin K-dependent clotting
factors, making Vitamin K its natural antagonist. Significant fluctuations in Vitamin K
intake, such as those found in spinach or kale, can drastically alter the International
Normalized Ratio (INR) levels. Maintaining a steady dietary habit ensures that the
anticoagulant dose remains effective and predictable throughout the treatment course.
3. A patient is diagnosed with hypertension and is started on an ACE inhibitor. Two weeks
later, the patient returns with a persistent, dry, non-productive cough. What is the most
likely cause of this side effect?
A. Pulmonary edema
B. Localized allergic reaction
C. Bronchospasm
D. Accumulation of bradykinin
,Answer: D
Rationale: Angiotensin-Converting Enzyme (ACE) is responsible for breaking down
bradykinin in the pulmonary tissues. When this enzyme is inhibited, bradykinin levels rise,
leading to irritation of the respiratory tract and the characteristic dry cough. This is a
common class-specific side effect that often necessitates a transition to an Angiotensin II
Receptor Blocker (ARB).
4. A nurse practitioner is treating an elderly patient with multiple comorbidities and is
concerned about the risk of drug toxicity. Which physiological change associated with aging
contributes most to decreased drug clearance?
A. Increased gastric pH
B. Decreased body fat
C. Increased serum albumin levels
D. Reduced glomerular filtration rate
Answer: D
Rationale: Age-related decline in renal function is the most significant factor impacting
pharmacokinetics in geriatric populations. A reduced glomerular filtration rate (GFR) leads
to the prolongation of half-lives for drugs primarily excreted by the kidneys. Clinicians
must use formulas like Cockcroft-Gault to estimate renal clearance and adjust dosages
accordingly to prevent adverse effects.
, 5. A 55-year-old patient is taking Digoxin for heart failure. Which electrolyte imbalance
should the Advanced Practice Nurse monitor most closely due to its role in potentiating
digoxin toxicity?
A. Hypernatremia
B. Hypercalcemia
C. Hypomagnesemia
D. Hypokalemia
Answer: D
Rationale: Digoxin binds to the same site on the Na+/K+ ATPase pump as potassium ions.
When potassium levels are low, there is less competition for these binding sites, allowing
digoxin to exert an exaggerated effect. This heightened sensitivity can lead to life-
threatening arrhythmias even when serum digoxin levels are within the traditional
therapeutic range.
6. Which of the following describes the ‘steady state’ of a drug in the systemic circulation?
A. The point at which the drug is completely eliminated from the body
B. The state where the rate of drug administration equals the rate of drug elimination
C. The time it takes for the concentration to drop by half
D. The highest concentration reached after a single dose
Answer: B
