NCLEX-RN Pharmacology Practice Questions |
20 ATI & NGN-Style MCQs with Detailed
Rationales |
Introduction to Pharmacology
Question 1
Clinical Scenario
A newly licensed nurse is preparing to administer several
prescribed medications on a medical-surgical unit. During
orientation, the nurse asks why medication administration
protocols require checking the medication label three times
before administration.
Question Stem
Which principle of pharmacology best supports this nursing
practice?
,A. It improves medication absorption.
B. It reduces the risk of medication administration errors.
C. It increases drug metabolism.
D. It shortens the onset of action.
Correct Answer
Correct Answer: B. It reduces the risk of medication
administration errors.
Detailed Rationale
Medication safety is a foundational principle of pharmacology
and nursing practice. Performing multiple medication checks
helps verify the right patient, medication, dose, route, and time,
which are core components of safe medication administration.
Checking labels when removing the medication, preparing it,
and before administration reduces the likelihood of selecting
the wrong medication, particularly with look-alike or sound-
alike drugs.
Option A is incorrect because label verification does not affect
absorption. Option C is incorrect because metabolism is
determined by physiologic and pharmacokinetic factors rather
than nursing verification procedures. Option D is incorrect
because onset of action depends on drug characteristics and
route of administration.
,Medication errors remain a significant cause of patient harm.
Nurses must follow established safety systems, use barcode
scanning when available, verify allergies, and clarify unclear
prescriptions before administration. These practices improve
patient outcomes and reduce preventable adverse events.
Learning Objective
After completing this question, the learner should be able to:
• Explain the purpose of medication verification procedures.
• Apply medication safety principles during drug
administration.
• Identify strategies to reduce medication errors.
Medication Safety Focus
Medication administration
Question 2
Clinical Scenario
A 72-year-old client with chronic kidney disease is prescribed a
new medication. The nurse reviews laboratory results showing
a serum creatinine of 2.6 mg/dL and an estimated glomerular
filtration rate (eGFR) of 28 mL/min.
Question Stem
, Which pharmacokinetic process is most likely to be altered in
this client?
A. Drug excretion
B. Drug absorption
C. Drug distribution
D. Drug dissolution
Correct Answer
Correct Answer: A. Drug excretion
Detailed Rationale
The kidneys are the primary organs responsible for eliminating
many medications and their metabolites. In clients with
impaired renal function, drug excretion is often delayed, leading
to increased serum drug concentrations and a higher risk for
toxicity. Medications such as digoxin, vancomycin, and certain
anticoagulants may require dose adjustment based on renal
function.
Option B is incorrect because absorption primarily occurs in the
gastrointestinal tract and is less affected by kidney disease.
Option C is incorrect because distribution can be altered in
some disease states but is not the primary pharmacokinetic
concern here. Option D is incorrect because dissolution refers
to a medication's breakdown before absorption.
20 ATI & NGN-Style MCQs with Detailed
Rationales |
Introduction to Pharmacology
Question 1
Clinical Scenario
A newly licensed nurse is preparing to administer several
prescribed medications on a medical-surgical unit. During
orientation, the nurse asks why medication administration
protocols require checking the medication label three times
before administration.
Question Stem
Which principle of pharmacology best supports this nursing
practice?
,A. It improves medication absorption.
B. It reduces the risk of medication administration errors.
C. It increases drug metabolism.
D. It shortens the onset of action.
Correct Answer
Correct Answer: B. It reduces the risk of medication
administration errors.
Detailed Rationale
Medication safety is a foundational principle of pharmacology
and nursing practice. Performing multiple medication checks
helps verify the right patient, medication, dose, route, and time,
which are core components of safe medication administration.
Checking labels when removing the medication, preparing it,
and before administration reduces the likelihood of selecting
the wrong medication, particularly with look-alike or sound-
alike drugs.
Option A is incorrect because label verification does not affect
absorption. Option C is incorrect because metabolism is
determined by physiologic and pharmacokinetic factors rather
than nursing verification procedures. Option D is incorrect
because onset of action depends on drug characteristics and
route of administration.
,Medication errors remain a significant cause of patient harm.
Nurses must follow established safety systems, use barcode
scanning when available, verify allergies, and clarify unclear
prescriptions before administration. These practices improve
patient outcomes and reduce preventable adverse events.
Learning Objective
After completing this question, the learner should be able to:
• Explain the purpose of medication verification procedures.
• Apply medication safety principles during drug
administration.
• Identify strategies to reduce medication errors.
Medication Safety Focus
Medication administration
Question 2
Clinical Scenario
A 72-year-old client with chronic kidney disease is prescribed a
new medication. The nurse reviews laboratory results showing
a serum creatinine of 2.6 mg/dL and an estimated glomerular
filtration rate (eGFR) of 28 mL/min.
Question Stem
, Which pharmacokinetic process is most likely to be altered in
this client?
A. Drug excretion
B. Drug absorption
C. Drug distribution
D. Drug dissolution
Correct Answer
Correct Answer: A. Drug excretion
Detailed Rationale
The kidneys are the primary organs responsible for eliminating
many medications and their metabolites. In clients with
impaired renal function, drug excretion is often delayed, leading
to increased serum drug concentrations and a higher risk for
toxicity. Medications such as digoxin, vancomycin, and certain
anticoagulants may require dose adjustment based on renal
function.
Option B is incorrect because absorption primarily occurs in the
gastrointestinal tract and is less affected by kidney disease.
Option C is incorrect because distribution can be altered in
some disease states but is not the primary pharmacokinetic
concern here. Option D is incorrect because dissolution refers
to a medication's breakdown before absorption.
