NCLEX-RN Pharmacology Infection Practice
Questions |
10 Original Antibiotics, Antifungals &
Antivirals MCQs with Detailed Rationales |
ATI & NGN Style
Question 1
Clinical Scenario
A 42-year-old female patient with a history of heart failure and
chronic kidney disease (baseline creatinine $1.8\text{ mg/dL}$)
is admitted with suspected healthcare-associated pneumonia.
The provider prescribes intravenous gentamicin $5\text{
mg/kg}$ daily to be infused over 60 minutes.
Question Stem
Which of the following nursing actions represents the most
critical medication safety intervention prior to administering the
first dose?
,A. Verify that the patient has a patent urinary catheter in place
to monitor hourly output.
B. Ensure a baseline serum creatinine has been drawn and
check if a peak gentamicin level is scheduled 30 minutes after
the infusion ends.
C. Confirm a baseline audiogram has been completed to
establish a hearing threshold.
D. Verify that baseline renal function has been evaluated and
confirm that a trough level is scheduled immediately before the
next dose.
Correct Answer
D. Verify that baseline renal function has been evaluated and
confirm that a trough level is scheduled immediately before the
next dose.
Detailed Rationale
Gentamicin is an aminoglycoside antibiotic with a narrow
therapeutic index and significant risks of nephrotoxicity and
ototoxicity. Aminoglycosides are cleared renally, and patients
with pre-existing renal impairment (like this patient's baseline
creatinine of $1.8\text{ mg/dL}$) are at an exceptionally high
risk for drug accumulation and toxicity.
To ensure safety:
,• Why D is correct: The nurse must confirm that baseline
renal function (Serum Creatinine and calculated
Glomerular Filtration Rate) has been evaluated to ensure
the dose is appropriately adjusted. Furthermore,
therapeutic drug monitoring (TDM) is essential. For once-
daily (extended-interval) dosing of aminoglycosides,
monitoring the trough level (drawn immediately—usually
within 30 minutes—before the next scheduled dose) is the
gold standard for minimizing nephrotoxicity. If the trough
is elevated, the dosing interval must be prolonged.
• Why A is incorrect: While monitoring fluid balance is
important, an indwelling urinary catheter is not routine or
required solely for gentamicin administration; non-invasive
monitoring (daily weights, strict I/O) is preferred to avoid
catheter-associated urinary tract infections (CAUTIs).
• Why B is incorrect: Peak levels (drawn 30 minutes after a
30-minute infusion or immediately after a 60-minute
infusion) are primarily utilized in traditional multi-day
dosing regimens, not once-daily extended-interval dosing,
where the trough level is the primary safety metric.
• Why C is incorrect: Although ototoxicity is a serious
adverse effect of aminoglycosides, delaying urgent
antibiotic therapy for pneumonia to obtain an outpatient-
style audiogram is clinically inappropriate and unsafe. The
, nurse should perform bedside assessments of hearing and
balance instead.
Learning Objectives
After completing this question, the learner should be able to:
• Identify high-risk patient populations for aminoglycoside-
induced nephrotoxicity.
• Determine the correct timing and clinical significance of
drawing aminoglycoside trough levels.
• Prioritize nursing pre-administration assessments for
nephrotoxic high-alert medications.
Medication Safety Focus
Monitoring
Question 2
Clinical Scenario
A 28-year-old male client is diagnosed with pulmonary
tuberculosis (TB) and is prescribed a multi-drug regimen
consisting of isoniazid, rifampin, pyrazinamide, and ethambutol.
During a follow-up clinic visit after 3 weeks of treatment, the
client complains that he has to hold his phone closer to read
text messages and has difficulty distinguishing between the red
and green icons on his screen.
Question Stem
Questions |
10 Original Antibiotics, Antifungals &
Antivirals MCQs with Detailed Rationales |
ATI & NGN Style
Question 1
Clinical Scenario
A 42-year-old female patient with a history of heart failure and
chronic kidney disease (baseline creatinine $1.8\text{ mg/dL}$)
is admitted with suspected healthcare-associated pneumonia.
The provider prescribes intravenous gentamicin $5\text{
mg/kg}$ daily to be infused over 60 minutes.
Question Stem
Which of the following nursing actions represents the most
critical medication safety intervention prior to administering the
first dose?
,A. Verify that the patient has a patent urinary catheter in place
to monitor hourly output.
B. Ensure a baseline serum creatinine has been drawn and
check if a peak gentamicin level is scheduled 30 minutes after
the infusion ends.
C. Confirm a baseline audiogram has been completed to
establish a hearing threshold.
D. Verify that baseline renal function has been evaluated and
confirm that a trough level is scheduled immediately before the
next dose.
Correct Answer
D. Verify that baseline renal function has been evaluated and
confirm that a trough level is scheduled immediately before the
next dose.
Detailed Rationale
Gentamicin is an aminoglycoside antibiotic with a narrow
therapeutic index and significant risks of nephrotoxicity and
ototoxicity. Aminoglycosides are cleared renally, and patients
with pre-existing renal impairment (like this patient's baseline
creatinine of $1.8\text{ mg/dL}$) are at an exceptionally high
risk for drug accumulation and toxicity.
To ensure safety:
,• Why D is correct: The nurse must confirm that baseline
renal function (Serum Creatinine and calculated
Glomerular Filtration Rate) has been evaluated to ensure
the dose is appropriately adjusted. Furthermore,
therapeutic drug monitoring (TDM) is essential. For once-
daily (extended-interval) dosing of aminoglycosides,
monitoring the trough level (drawn immediately—usually
within 30 minutes—before the next scheduled dose) is the
gold standard for minimizing nephrotoxicity. If the trough
is elevated, the dosing interval must be prolonged.
• Why A is incorrect: While monitoring fluid balance is
important, an indwelling urinary catheter is not routine or
required solely for gentamicin administration; non-invasive
monitoring (daily weights, strict I/O) is preferred to avoid
catheter-associated urinary tract infections (CAUTIs).
• Why B is incorrect: Peak levels (drawn 30 minutes after a
30-minute infusion or immediately after a 60-minute
infusion) are primarily utilized in traditional multi-day
dosing regimens, not once-daily extended-interval dosing,
where the trough level is the primary safety metric.
• Why C is incorrect: Although ototoxicity is a serious
adverse effect of aminoglycosides, delaying urgent
antibiotic therapy for pneumonia to obtain an outpatient-
style audiogram is clinically inappropriate and unsafe. The
, nurse should perform bedside assessments of hearing and
balance instead.
Learning Objectives
After completing this question, the learner should be able to:
• Identify high-risk patient populations for aminoglycoside-
induced nephrotoxicity.
• Determine the correct timing and clinical significance of
drawing aminoglycoside trough levels.
• Prioritize nursing pre-administration assessments for
nephrotoxic high-alert medications.
Medication Safety Focus
Monitoring
Question 2
Clinical Scenario
A 28-year-old male client is diagnosed with pulmonary
tuberculosis (TB) and is prescribed a multi-drug regimen
consisting of isoniazid, rifampin, pyrazinamide, and ethambutol.
During a follow-up clinic visit after 3 weeks of treatment, the
client complains that he has to hold his phone closer to read
text messages and has difficulty distinguishing between the red
and green icons on his screen.
Question Stem
