Introduction to Pharmacology - NCLEX-RN
Practice Questions:
20 Clinical Scenarios with Detailed Rationales
Question 1
Clinical Scenario
A 72-year-old man is admitted with community-acquired
pneumonia. His medical history includes hypertension, chronic
kidney disease stage 3, and osteoarthritis. The provider
prescribes an oral antibiotic to begin immediately. During
medication reconciliation, the nurse learns the client takes
several over-the-counter herbal supplements and occasionally
forgets to take prescribed medications. Before administering
the first dose, the nurse reviews the client's allergies, current
medications, renal function, and the medication administration
record.
Question Stem
,Which nursing action best demonstrates the application of safe
pharmacology principles before administering the prescribed
medication?
A. Administer the antibiotic immediately because delaying
treatment increases infection risk.
B. Verify the client's identity using two identifiers, review
allergies and current medications, and assess for potential drug
interactions before administration.
C. Ask the client's family whether the medication has been
taken previously and administer it if they agree.
D. Administer the medication first and review laboratory results
afterward.
Correct Answer: B. Verify the client's identity using two
identifiers, review allergies and current medications, and
assess for potential drug interactions before administration.
Detailed Rationale
Safe medication administration begins with a systematic
assessment before giving any medication. Verifying the client's
identity using two approved identifiers, confirming allergies,
reviewing the medication list for prescription, over-the-counter,
and herbal products, and assessing laboratory values such as
renal function are all essential nursing responsibilities. Older
adults commonly take multiple medications, increasing the risk
,for drug-drug interactions, duplicate therapy, and adverse drug
events. Reviewing these factors before administration promotes
patient safety and supports individualized medication therapy.
Option A is incorrect because timely antibiotic administration is
important, but it should never bypass safety checks.
Administering medication without verifying allergies or
interactions may cause preventable harm.
Option C is incorrect because family members cannot replace
appropriate medication verification procedures. Medication
administration decisions should rely on the medical record,
assessment findings, and provider orders.
Option D is incorrect because laboratory values, especially renal
function, may influence medication selection or dosage.
Reviewing laboratory results after administration defeats the
purpose of preventing medication-related complications.
This question highlights the nurse's role in reducing medication
errors through careful assessment, medication reconciliation,
and adherence to established medication administration
standards.
Learning Objectives
After completing this question, the learner should be able to:
• Apply the principles of safe medication administration
before giving medications.
, • Recognize the importance of medication reconciliation.
• Identify assessment findings that influence medication
safety.
• Reduce the risk of preventable medication errors.
Medication Safety Focus: Medication reconciliation
Question 2
Clinical Scenario
A 58-year-old woman with newly diagnosed hypertension asks
the nurse why she must continue taking her antihypertensive
medication even though she feels well. Her blood pressure is
164/96 mm Hg, heart rate is 78/min, and she denies symptoms.
Question Stem
Which response by the nurse best explains the purpose of
pharmacologic therapy?
A. "You only need the medication when your blood pressure
becomes very high."
B. "The medication treats the underlying cause of hypertension
permanently."
Practice Questions:
20 Clinical Scenarios with Detailed Rationales
Question 1
Clinical Scenario
A 72-year-old man is admitted with community-acquired
pneumonia. His medical history includes hypertension, chronic
kidney disease stage 3, and osteoarthritis. The provider
prescribes an oral antibiotic to begin immediately. During
medication reconciliation, the nurse learns the client takes
several over-the-counter herbal supplements and occasionally
forgets to take prescribed medications. Before administering
the first dose, the nurse reviews the client's allergies, current
medications, renal function, and the medication administration
record.
Question Stem
,Which nursing action best demonstrates the application of safe
pharmacology principles before administering the prescribed
medication?
A. Administer the antibiotic immediately because delaying
treatment increases infection risk.
B. Verify the client's identity using two identifiers, review
allergies and current medications, and assess for potential drug
interactions before administration.
C. Ask the client's family whether the medication has been
taken previously and administer it if they agree.
D. Administer the medication first and review laboratory results
afterward.
Correct Answer: B. Verify the client's identity using two
identifiers, review allergies and current medications, and
assess for potential drug interactions before administration.
Detailed Rationale
Safe medication administration begins with a systematic
assessment before giving any medication. Verifying the client's
identity using two approved identifiers, confirming allergies,
reviewing the medication list for prescription, over-the-counter,
and herbal products, and assessing laboratory values such as
renal function are all essential nursing responsibilities. Older
adults commonly take multiple medications, increasing the risk
,for drug-drug interactions, duplicate therapy, and adverse drug
events. Reviewing these factors before administration promotes
patient safety and supports individualized medication therapy.
Option A is incorrect because timely antibiotic administration is
important, but it should never bypass safety checks.
Administering medication without verifying allergies or
interactions may cause preventable harm.
Option C is incorrect because family members cannot replace
appropriate medication verification procedures. Medication
administration decisions should rely on the medical record,
assessment findings, and provider orders.
Option D is incorrect because laboratory values, especially renal
function, may influence medication selection or dosage.
Reviewing laboratory results after administration defeats the
purpose of preventing medication-related complications.
This question highlights the nurse's role in reducing medication
errors through careful assessment, medication reconciliation,
and adherence to established medication administration
standards.
Learning Objectives
After completing this question, the learner should be able to:
• Apply the principles of safe medication administration
before giving medications.
, • Recognize the importance of medication reconciliation.
• Identify assessment findings that influence medication
safety.
• Reduce the risk of preventable medication errors.
Medication Safety Focus: Medication reconciliation
Question 2
Clinical Scenario
A 58-year-old woman with newly diagnosed hypertension asks
the nurse why she must continue taking her antihypertensive
medication even though she feels well. Her blood pressure is
164/96 mm Hg, heart rate is 78/min, and she denies symptoms.
Question Stem
Which response by the nurse best explains the purpose of
pharmacologic therapy?
A. "You only need the medication when your blood pressure
becomes very high."
B. "The medication treats the underlying cause of hypertension
permanently."
