Introduction to Pharmacology NCLEX-RN
Test Bank |
20 Clinical Judgment MCQs with
Rationales
Question 1
Clinical Scenario
A 68-year-old man is admitted to the medical unit with
community-acquired pneumonia. His medical history includes
hypertension, chronic kidney disease stage 3, and
osteoarthritis. The provider prescribes ceftriaxone 1 g IV every
24 hours. During the admission assessment, the nurse discovers
the client reports a "severe allergic reaction" to penicillin as a
teenager that included difficulty breathing and facial swelling.
Vital signs are stable.
Question Stem
Which action should the nurse take before administering the
first dose of ceftriaxone?
,A. Administer the medication as prescribed because
cephalosporins are unrelated to penicillins.
B. Administer diphenhydramine before the antibiotic to reduce
the risk of an allergic reaction.
C. Hold the medication and notify the provider about the
client's history of anaphylaxis to penicillin.
D. Administer half the prescribed dose and observe the client
closely.
Correct Answer
C. Hold the medication and notify the provider about the
client's history of anaphylaxis to penicillin.
Detailed Rationale
Medication administration begins with a thorough assessment
of allergies and previous hypersensitivity reactions. Although
many patients with penicillin allergies safely receive
cephalosporins, a history of anaphylaxis (airway swelling,
respiratory distress, facial edema) warrants careful evaluation
before administering a cephalosporin such as ceftriaxone. The
nurse should withhold the medication and immediately notify
the provider so the risks and alternative antibiotics can be
considered. This action prioritizes patient safety and prevents a
potentially life-threatening reaction.
,Option A is incorrect because cephalosporins share structural
similarities with penicillins, and while cross-reactivity is
uncommon, caution is required in patients with severe IgE-
mediated reactions.
Option B is incorrect because administering diphenhydramine
does not prevent anaphylaxis and should never be used to
justify giving a potentially contraindicated medication.
Option D is incorrect because reducing the dose does not
reduce the risk of an allergic reaction. Even a small exposure
can trigger severe hypersensitivity.
Nurses should always distinguish between mild adverse effects
(such as nausea) and true allergies, document reactions
accurately, and clarify unclear allergy histories before
medication administration.
Learning Objectives
After completing this question, the learner should be able to:
• Differentiate a medication allergy from a side effect.
• Identify when a medication should be withheld because of
allergy history.
• Prioritize safe nursing actions before administering
antibiotics.
Medication Safety Focus
, Contraindication and Allergy Assessment
Question 2
Clinical Scenario
A nurse is preparing morning medications for four hospitalized
clients. The electronic medication administration record (eMAR)
indicates all medications are due at 0900. Before
administration, the nurse verifies each client's identity using
two approved identifiers and compares the medications with
the provider's prescriptions.
Question Stem
Which nursing principle is being demonstrated to reduce
medication errors?
A. Therapeutic drug monitoring
B. The rights of medication administration
C. Medication reconciliation
D. Dose titration
Correct Answer
B. The rights of medication administration
Detailed Rationale
Test Bank |
20 Clinical Judgment MCQs with
Rationales
Question 1
Clinical Scenario
A 68-year-old man is admitted to the medical unit with
community-acquired pneumonia. His medical history includes
hypertension, chronic kidney disease stage 3, and
osteoarthritis. The provider prescribes ceftriaxone 1 g IV every
24 hours. During the admission assessment, the nurse discovers
the client reports a "severe allergic reaction" to penicillin as a
teenager that included difficulty breathing and facial swelling.
Vital signs are stable.
Question Stem
Which action should the nurse take before administering the
first dose of ceftriaxone?
,A. Administer the medication as prescribed because
cephalosporins are unrelated to penicillins.
B. Administer diphenhydramine before the antibiotic to reduce
the risk of an allergic reaction.
C. Hold the medication and notify the provider about the
client's history of anaphylaxis to penicillin.
D. Administer half the prescribed dose and observe the client
closely.
Correct Answer
C. Hold the medication and notify the provider about the
client's history of anaphylaxis to penicillin.
Detailed Rationale
Medication administration begins with a thorough assessment
of allergies and previous hypersensitivity reactions. Although
many patients with penicillin allergies safely receive
cephalosporins, a history of anaphylaxis (airway swelling,
respiratory distress, facial edema) warrants careful evaluation
before administering a cephalosporin such as ceftriaxone. The
nurse should withhold the medication and immediately notify
the provider so the risks and alternative antibiotics can be
considered. This action prioritizes patient safety and prevents a
potentially life-threatening reaction.
,Option A is incorrect because cephalosporins share structural
similarities with penicillins, and while cross-reactivity is
uncommon, caution is required in patients with severe IgE-
mediated reactions.
Option B is incorrect because administering diphenhydramine
does not prevent anaphylaxis and should never be used to
justify giving a potentially contraindicated medication.
Option D is incorrect because reducing the dose does not
reduce the risk of an allergic reaction. Even a small exposure
can trigger severe hypersensitivity.
Nurses should always distinguish between mild adverse effects
(such as nausea) and true allergies, document reactions
accurately, and clarify unclear allergy histories before
medication administration.
Learning Objectives
After completing this question, the learner should be able to:
• Differentiate a medication allergy from a side effect.
• Identify when a medication should be withheld because of
allergy history.
• Prioritize safe nursing actions before administering
antibiotics.
Medication Safety Focus
, Contraindication and Allergy Assessment
Question 2
Clinical Scenario
A nurse is preparing morning medications for four hospitalized
clients. The electronic medication administration record (eMAR)
indicates all medications are due at 0900. Before
administration, the nurse verifies each client's identity using
two approved identifiers and compares the medications with
the provider's prescriptions.
Question Stem
Which nursing principle is being demonstrated to reduce
medication errors?
A. Therapeutic drug monitoring
B. The rights of medication administration
C. Medication reconciliation
D. Dose titration
Correct Answer
B. The rights of medication administration
Detailed Rationale
