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NR 545 exam testbank Newest Exam Preparation
With Complete Questions And Correct Answers With
Rationales Already Graded A+Brand New Version!!
Question 1
A 68-year-old patient with chronic kidney disease (Stage 3) is prescribed
a medication that undergoes significant renal elimination. The
prescriber orders a standard dose based on normal renal function.
Which pharmacokinetic parameter is MOST likely to be affected, and
what adjustment is needed?
A. Absorption; dose should be administered with food
B. Distribution; dose should be increased
C. Metabolism; dose should be decreased
D. Elimination; dose should be decreased
Correct Answer: D
Explanation: In renal impairment, drug elimination is reduced, leading
to drug accumulation and toxicity. Dose reduction or extended dosing
intervals are necessary. The half-life increases, requiring adjustments.
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Renal function directly impacts the elimination phase of
pharmacokinetics.
Question 2
A nurse practitioner is explaining to a patient why a loading dose is
being prescribed for a severe infection. What is the PRIMARY purpose
of administering a loading dose?
A. To minimize adverse drug reactions
B. To achieve therapeutic drug levels more rapidly
C. To prolong the duration of drug action
D. To reduce the frequency of dosing
Correct Answer: B
Explanation: A loading dose is given to rapidly achieve therapeutic drug
concentrations in the blood, allowing the drug to begin working sooner
than would occur with maintenance dosing alone. It does not minimize
adverse reactions, prolong duration, or reduce dosing frequency.
Question 3
Which pharmacokinetic process is most affected in elderly patients due
to decreased hepatic blood flow?
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A. Absorption
B. Metabolism
C. Distribution
D. Excretion
Correct Answer: B
Explanation: Metabolism is affected because hepatic blood flow and
enzyme activity decline with age, reducing drug clearance. The liver's
ability to metabolize drugs diminishes, leading to prolonged drug action
and increased risk of adverse effects.
Question 4
A patient taking warfarin is prescribed trimethoprim-sulfamethoxazole.
What is the major concern?
A. Decreased warfarin effect
B. Increased bleeding risk
C. Hypertension
D. Bradycardia
Correct Answer: B
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Explanation: Trimethoprim-sulfamethoxazole inhibits warfarin
metabolism, increasing the INR and bleeding risk. This drug interaction
can lead to serious hemorrhagic complications and requires close
monitoring of coagulation parameters.
Question 5
The nurse should teach a patient taking lithium to avoid which common
over-the-counter medication?
A. Ibuprofen
B. Acetaminophen
C. Aspirin
D. Loratadine
Correct Answer: A
Explanation: NSAIDs like ibuprofen reduce renal lithium clearance,
increasing the risk of lithium toxicity. Patients on lithium should be
counseled to avoid NSAIDs and maintain adequate hydration.
Question 6
Which drug class is first-line for chronic hypertension in African
American patients without chronic kidney disease or diabetes?
NR 545 exam testbank Newest Exam Preparation
With Complete Questions And Correct Answers With
Rationales Already Graded A+Brand New Version!!
Question 1
A 68-year-old patient with chronic kidney disease (Stage 3) is prescribed
a medication that undergoes significant renal elimination. The
prescriber orders a standard dose based on normal renal function.
Which pharmacokinetic parameter is MOST likely to be affected, and
what adjustment is needed?
A. Absorption; dose should be administered with food
B. Distribution; dose should be increased
C. Metabolism; dose should be decreased
D. Elimination; dose should be decreased
Correct Answer: D
Explanation: In renal impairment, drug elimination is reduced, leading
to drug accumulation and toxicity. Dose reduction or extended dosing
intervals are necessary. The half-life increases, requiring adjustments.
,2|Page
Renal function directly impacts the elimination phase of
pharmacokinetics.
Question 2
A nurse practitioner is explaining to a patient why a loading dose is
being prescribed for a severe infection. What is the PRIMARY purpose
of administering a loading dose?
A. To minimize adverse drug reactions
B. To achieve therapeutic drug levels more rapidly
C. To prolong the duration of drug action
D. To reduce the frequency of dosing
Correct Answer: B
Explanation: A loading dose is given to rapidly achieve therapeutic drug
concentrations in the blood, allowing the drug to begin working sooner
than would occur with maintenance dosing alone. It does not minimize
adverse reactions, prolong duration, or reduce dosing frequency.
Question 3
Which pharmacokinetic process is most affected in elderly patients due
to decreased hepatic blood flow?
,3|Page
A. Absorption
B. Metabolism
C. Distribution
D. Excretion
Correct Answer: B
Explanation: Metabolism is affected because hepatic blood flow and
enzyme activity decline with age, reducing drug clearance. The liver's
ability to metabolize drugs diminishes, leading to prolonged drug action
and increased risk of adverse effects.
Question 4
A patient taking warfarin is prescribed trimethoprim-sulfamethoxazole.
What is the major concern?
A. Decreased warfarin effect
B. Increased bleeding risk
C. Hypertension
D. Bradycardia
Correct Answer: B
, 4|Page
Explanation: Trimethoprim-sulfamethoxazole inhibits warfarin
metabolism, increasing the INR and bleeding risk. This drug interaction
can lead to serious hemorrhagic complications and requires close
monitoring of coagulation parameters.
Question 5
The nurse should teach a patient taking lithium to avoid which common
over-the-counter medication?
A. Ibuprofen
B. Acetaminophen
C. Aspirin
D. Loratadine
Correct Answer: A
Explanation: NSAIDs like ibuprofen reduce renal lithium clearance,
increasing the risk of lithium toxicity. Patients on lithium should be
counseled to avoid NSAIDs and maintain adequate hydration.
Question 6
Which drug class is first-line for chronic hypertension in African
American patients without chronic kidney disease or diabetes?
