ATI Pharmacology Made Easy
Introduction to Pharmacology Practice
Questions |
NCLEX-RN NGN Exam Prep | 20 Original
Nursing MCQs with Rationales
Question 1
Clinical Scenario
A nurse is preparing to administer a newly prescribed oral
medication to a 72-year-old client with hypertension and type 2
diabetes mellitus. The client states, "This pill looks different
from the one I usually take at home." The medication
administration record (MAR) lists the drug as lisinopril 20 mg
PO daily. The medication supplied by the pharmacy has a
different color and shape than the client's home medication.
Question Stem
Which action should the nurse take first?
,A. Administer the medication because the dose and medication
name match the MAR.
B. Ask another nurse to administer the medication.
C. Verify the medication with the pharmacy before
administration.
D. Hold all medications until the provider can be contacted.
Correct Answer: C. Verify the medication with the pharmacy
before administration.
Detailed Rationale
Medication appearance frequently varies among manufacturers
and generic formulations. A different color or shape does not
necessarily indicate an incorrect medication. However, a client
expressing concern represents an opportunity to prevent a
potential medication error. The nurse should verify the
medication with the pharmacy before administration to ensure
the correct drug was dispensed. This action follows the
principles of safe medication administration and supports the
client's role in preventing medication errors.
Option A is incorrect because matching the MAR alone is
insufficient when there is uncertainty about the dispensed
medication. Verification is required before administration.
Option B is incorrect because delegating administration does
not resolve the concern or verify medication accuracy.
,Option D is incorrect because immediately holding all
medications could unnecessarily delay essential therapy.
Contacting the pharmacy is the most efficient first step.
Medication safety relies on performing the rights of medication
administration, encouraging clients to speak up about concerns,
and investigating discrepancies before giving any medication.
Learning Objectives
After completing this question, the learner should be able to:
• Apply medication verification strategies before
administration.
• Recognize the importance of involving clients in
medication safety.
• Prioritize nursing actions when medication discrepancies
are identified.
Medication Safety Focus: Medication Administration
Question 2
Clinical Scenario
A nurse is educating a group of newly hired nurses about
pharmacokinetics. One nurse asks why some medications
require multiple daily doses while others are administered once
daily.
, Question Stem
Which pharmacokinetic concept primarily determines how
frequently a medication is administered?
A. Drug half-life
B. Therapeutic index
C. Drug potency
D. Receptor affinity
Correct Answer: A. Drug half-life
Detailed Rationale
Drug half-life is the amount of time required for the
concentration of a medication in the bloodstream to decrease
by approximately 50%. Understanding half-life helps determine
dosing frequency because medications with shorter half-lives
require more frequent administration to maintain therapeutic
blood concentrations, whereas drugs with longer half-lives can
often be given less frequently.
Option B is incorrect because the therapeutic index compares
toxic and effective doses but does not determine dosing
intervals.
Option C is incorrect because potency refers to the amount of
drug needed to produce a desired effect rather than how often
it should be administered.
Introduction to Pharmacology Practice
Questions |
NCLEX-RN NGN Exam Prep | 20 Original
Nursing MCQs with Rationales
Question 1
Clinical Scenario
A nurse is preparing to administer a newly prescribed oral
medication to a 72-year-old client with hypertension and type 2
diabetes mellitus. The client states, "This pill looks different
from the one I usually take at home." The medication
administration record (MAR) lists the drug as lisinopril 20 mg
PO daily. The medication supplied by the pharmacy has a
different color and shape than the client's home medication.
Question Stem
Which action should the nurse take first?
,A. Administer the medication because the dose and medication
name match the MAR.
B. Ask another nurse to administer the medication.
C. Verify the medication with the pharmacy before
administration.
D. Hold all medications until the provider can be contacted.
Correct Answer: C. Verify the medication with the pharmacy
before administration.
Detailed Rationale
Medication appearance frequently varies among manufacturers
and generic formulations. A different color or shape does not
necessarily indicate an incorrect medication. However, a client
expressing concern represents an opportunity to prevent a
potential medication error. The nurse should verify the
medication with the pharmacy before administration to ensure
the correct drug was dispensed. This action follows the
principles of safe medication administration and supports the
client's role in preventing medication errors.
Option A is incorrect because matching the MAR alone is
insufficient when there is uncertainty about the dispensed
medication. Verification is required before administration.
Option B is incorrect because delegating administration does
not resolve the concern or verify medication accuracy.
,Option D is incorrect because immediately holding all
medications could unnecessarily delay essential therapy.
Contacting the pharmacy is the most efficient first step.
Medication safety relies on performing the rights of medication
administration, encouraging clients to speak up about concerns,
and investigating discrepancies before giving any medication.
Learning Objectives
After completing this question, the learner should be able to:
• Apply medication verification strategies before
administration.
• Recognize the importance of involving clients in
medication safety.
• Prioritize nursing actions when medication discrepancies
are identified.
Medication Safety Focus: Medication Administration
Question 2
Clinical Scenario
A nurse is educating a group of newly hired nurses about
pharmacokinetics. One nurse asks why some medications
require multiple daily doses while others are administered once
daily.
, Question Stem
Which pharmacokinetic concept primarily determines how
frequently a medication is administered?
A. Drug half-life
B. Therapeutic index
C. Drug potency
D. Receptor affinity
Correct Answer: A. Drug half-life
Detailed Rationale
Drug half-life is the amount of time required for the
concentration of a medication in the bloodstream to decrease
by approximately 50%. Understanding half-life helps determine
dosing frequency because medications with shorter half-lives
require more frequent administration to maintain therapeutic
blood concentrations, whereas drugs with longer half-lives can
often be given less frequently.
Option B is incorrect because the therapeutic index compares
toxic and effective doses but does not determine dosing
intervals.
Option C is incorrect because potency refers to the amount of
drug needed to produce a desired effect rather than how often
it should be administered.
