NCLEX-RN Pharmacology Infection Drugs
Practice Questions |
20 ATI & NGN-Style MCQs with Rationales |
Antibiotics, Antifungals & Antivirals Exam
Prep
Question 1
Clinical Scenario
A 28-year-old female client with a history of recurrent urinary
tract infections (UTIs) presents to the clinic with dysuria,
urgency, and lower abdominal discomfort. The provider
prescribes ciprofloxacin 250 mg PO twice daily for 3 days.
During the medication reconciliation, the nurse notes the
client’s home medications include a multivitamin with iron,
calcium carbonate, and oral ethinyl estradiol/levonorgestrel (an
oral contraceptive).
Question Stem
Which instruction is most critical for the nurse to include in the
teaching plan for this client?
,A. "Take the ciprofloxacin at the same time as your calcium
carbonate to minimize stomach upset."
B. "Use a barrier method of contraception, such as condoms,
during therapy and for at least one week after completing the
course."
C. "Take your multivitamin and calcium carbonate at least 2
hours before or 6 hours after taking your ciprofloxacin."
D. "Expect your urine to turn a bright orange-red color while
taking this medication."
Correct Answer
Correct Answer: C. "Take your multivitamin and calcium
carbonate at least 2 hours before or 6 hours after taking your
ciprofloxacin."
Detailed Rationale
Fluoroquinolones, such as ciprofloxacin, are subject to chelation
when administered concurrently with divalent or trivalent
cations (such as iron, calcium, magnesium, aluminum, and zinc).
This chelation significantly impairs the absorption of the
antibiotic in the gastrointestinal tract, leading to subtherapeutic
drug levels and potential treatment failure. To prevent this
drug-nutrient interaction, the client must space out the
administration of these supplements—taking the ciprofloxacin
,either 2 hours before or 6 hours after any cation-containing
products.
• Option A is incorrect because taking ciprofloxacin
concurrently with calcium carbonate will severely decrease
its bioavailability.
• Option B is incorrect because while some broad-spectrum
antibiotics have historically been thought to reduce oral
contraceptive efficacy, current evidence indicates that non-
enzyme-inducing antibiotics (like ciprofloxacin) do not
significantly compromise oral contraceptive efficacy.
• Option D is incorrect because orange-red urine is a
common side effect of phenazopyridine (a urinary
analgesic), not ciprofloxacin.
Learning Objective
After completing this question, the learner should be able to:
• Identify significant drug-nutrient interactions involving
fluoroquinolones.
• Counsel patients on the proper timing of mineral
supplements and antacids relative to fluoroquinolone
administration.
• Explain the physiological consequences of chelation on
drug bioavailability.
, Medication Safety Focus
Drug interaction
Question 2
Clinical Scenario
An 82-year-old male client is admitted with severe healthcare-
associated pneumonia. The provider initiates empirical
intravenous therapy with vancomycin and
piperacillin/tazobactam. The client has a history of stage 3
chronic kidney disease (CKD) with a baseline creatinine of
1.6 mg/dL.
Question Stem
Which assessment finding requires immediate intervention by
the nurse?
A. The client reports a persistent metallic taste in his mouth.
B. Serum creatinine increases from 1.6 mg/dL to 2.4 mg/dL
within 48 hours.
C. The client reports mild localized itching at the intravenous
insertion site.
D. A vancomycin trough level drawn 30 minutes prior to the
fourth dose is 12 mcg/mL.
Correct Answer
Practice Questions |
20 ATI & NGN-Style MCQs with Rationales |
Antibiotics, Antifungals & Antivirals Exam
Prep
Question 1
Clinical Scenario
A 28-year-old female client with a history of recurrent urinary
tract infections (UTIs) presents to the clinic with dysuria,
urgency, and lower abdominal discomfort. The provider
prescribes ciprofloxacin 250 mg PO twice daily for 3 days.
During the medication reconciliation, the nurse notes the
client’s home medications include a multivitamin with iron,
calcium carbonate, and oral ethinyl estradiol/levonorgestrel (an
oral contraceptive).
Question Stem
Which instruction is most critical for the nurse to include in the
teaching plan for this client?
,A. "Take the ciprofloxacin at the same time as your calcium
carbonate to minimize stomach upset."
B. "Use a barrier method of contraception, such as condoms,
during therapy and for at least one week after completing the
course."
C. "Take your multivitamin and calcium carbonate at least 2
hours before or 6 hours after taking your ciprofloxacin."
D. "Expect your urine to turn a bright orange-red color while
taking this medication."
Correct Answer
Correct Answer: C. "Take your multivitamin and calcium
carbonate at least 2 hours before or 6 hours after taking your
ciprofloxacin."
Detailed Rationale
Fluoroquinolones, such as ciprofloxacin, are subject to chelation
when administered concurrently with divalent or trivalent
cations (such as iron, calcium, magnesium, aluminum, and zinc).
This chelation significantly impairs the absorption of the
antibiotic in the gastrointestinal tract, leading to subtherapeutic
drug levels and potential treatment failure. To prevent this
drug-nutrient interaction, the client must space out the
administration of these supplements—taking the ciprofloxacin
,either 2 hours before or 6 hours after any cation-containing
products.
• Option A is incorrect because taking ciprofloxacin
concurrently with calcium carbonate will severely decrease
its bioavailability.
• Option B is incorrect because while some broad-spectrum
antibiotics have historically been thought to reduce oral
contraceptive efficacy, current evidence indicates that non-
enzyme-inducing antibiotics (like ciprofloxacin) do not
significantly compromise oral contraceptive efficacy.
• Option D is incorrect because orange-red urine is a
common side effect of phenazopyridine (a urinary
analgesic), not ciprofloxacin.
Learning Objective
After completing this question, the learner should be able to:
• Identify significant drug-nutrient interactions involving
fluoroquinolones.
• Counsel patients on the proper timing of mineral
supplements and antacids relative to fluoroquinolone
administration.
• Explain the physiological consequences of chelation on
drug bioavailability.
, Medication Safety Focus
Drug interaction
Question 2
Clinical Scenario
An 82-year-old male client is admitted with severe healthcare-
associated pneumonia. The provider initiates empirical
intravenous therapy with vancomycin and
piperacillin/tazobactam. The client has a history of stage 3
chronic kidney disease (CKD) with a baseline creatinine of
1.6 mg/dL.
Question Stem
Which assessment finding requires immediate intervention by
the nurse?
A. The client reports a persistent metallic taste in his mouth.
B. Serum creatinine increases from 1.6 mg/dL to 2.4 mg/dL
within 48 hours.
C. The client reports mild localized itching at the intravenous
insertion site.
D. A vancomycin trough level drawn 30 minutes prior to the
fourth dose is 12 mcg/mL.
Correct Answer
