NCLEX-RN Pharmacology Practice Questions:
20 Infection Medications
(Antibiotics, Antifungals & Antivirals) with
Detailed Rationales |
ATI & NGN Style Nursing Exam
Question 1
Clinical Scenario
A 24-year-old woman is prescribed amoxicillin for acute
streptococcal pharyngitis. She asks the nurse how she will know
the medication is working.
Question Stem
Which outcome best indicates a therapeutic response to
amoxicillin?
A. White blood cell count increases within 24 hours
B. Resolution of sore throat and fever within several days
C. Development of mild diarrhea after starting therapy
D. Urine becomes dark yellow during treatment
,Correct Answer
B. Resolution of sore throat and fever within several days
Detailed Rationale
Amoxicillin is a beta-lactam antibiotic that inhibits bacterial cell
wall synthesis, leading to bacterial death. The expected
therapeutic response is improvement in infection-related
symptoms such as fever, throat pain, and inflammation. Clinical
improvement generally occurs within 48–72 hours, although
patients should complete the full course even if symptoms
improve sooner.
Option A is incorrect because an increasing WBC count may
indicate worsening infection rather than treatment success.
Option C is incorrect because diarrhea is a potential adverse
effect, not evidence of therapeutic effectiveness. Option D is
incorrect because dark urine is not an expected indicator of
effectiveness and may warrant further evaluation depending on
severity and associated symptoms.
Nurses should educate patients to complete prescribed therapy,
monitor for allergic reactions, and report severe diarrhea
suggestive of Clostridioides difficile infection. Symptom
resolution combined with improved clinical assessment findings
provides the best evidence of therapeutic effectiveness.
Learning Objective
, After completing this question, the learner should be able to:
• Identify expected therapeutic outcomes of penicillin-class
antibiotics.
• Differentiate therapeutic effects from adverse effects.
• Evaluate treatment effectiveness in bacterial infections.
• Educate patients regarding antibiotic adherence.
Medication Safety Focus
Therapeutic Evaluation
Question 2
Clinical Scenario
A 68-year-old man with chronic kidney disease is prescribed
gentamicin for a severe gram-negative infection. Laboratory
results reveal a serum creatinine of 2.4 mg/dL.
Question Stem
Which assessment finding requires the nurse's immediate
attention?
A. Mild nausea after meals
B. Tinnitus and difficulty hearing conversations
C. Oral temperature of 99°F (37.2°C)
D. Decreased appetite
20 Infection Medications
(Antibiotics, Antifungals & Antivirals) with
Detailed Rationales |
ATI & NGN Style Nursing Exam
Question 1
Clinical Scenario
A 24-year-old woman is prescribed amoxicillin for acute
streptococcal pharyngitis. She asks the nurse how she will know
the medication is working.
Question Stem
Which outcome best indicates a therapeutic response to
amoxicillin?
A. White blood cell count increases within 24 hours
B. Resolution of sore throat and fever within several days
C. Development of mild diarrhea after starting therapy
D. Urine becomes dark yellow during treatment
,Correct Answer
B. Resolution of sore throat and fever within several days
Detailed Rationale
Amoxicillin is a beta-lactam antibiotic that inhibits bacterial cell
wall synthesis, leading to bacterial death. The expected
therapeutic response is improvement in infection-related
symptoms such as fever, throat pain, and inflammation. Clinical
improvement generally occurs within 48–72 hours, although
patients should complete the full course even if symptoms
improve sooner.
Option A is incorrect because an increasing WBC count may
indicate worsening infection rather than treatment success.
Option C is incorrect because diarrhea is a potential adverse
effect, not evidence of therapeutic effectiveness. Option D is
incorrect because dark urine is not an expected indicator of
effectiveness and may warrant further evaluation depending on
severity and associated symptoms.
Nurses should educate patients to complete prescribed therapy,
monitor for allergic reactions, and report severe diarrhea
suggestive of Clostridioides difficile infection. Symptom
resolution combined with improved clinical assessment findings
provides the best evidence of therapeutic effectiveness.
Learning Objective
, After completing this question, the learner should be able to:
• Identify expected therapeutic outcomes of penicillin-class
antibiotics.
• Differentiate therapeutic effects from adverse effects.
• Evaluate treatment effectiveness in bacterial infections.
• Educate patients regarding antibiotic adherence.
Medication Safety Focus
Therapeutic Evaluation
Question 2
Clinical Scenario
A 68-year-old man with chronic kidney disease is prescribed
gentamicin for a severe gram-negative infection. Laboratory
results reveal a serum creatinine of 2.4 mg/dL.
Question Stem
Which assessment finding requires the nurse's immediate
attention?
A. Mild nausea after meals
B. Tinnitus and difficulty hearing conversations
C. Oral temperature of 99°F (37.2°C)
D. Decreased appetite
