1
NCLEX PN Exam Bank Antibiotics Antivirals and
Antifungal Agents
Table of Contents
Subtopic 1: Principles of Antimicrobial Therapy and Mechanisms of Action ....................... 2
Subtopic 2: Antibiotic Classes, Side Effects, and Nursing Interventions ............................ 9
Subtopic 3: Antiviral Therapy—Indications, Safety, and Monitoring ................................. 17
Subtopic 4: Antifungal Medications—Systemic and Topical Use, Monitoring, and Safety .. 25
Subtopic 5: Antibiotic Resistance and Nursing Strategies for Prevention ......................... 33
Subtopic 6: Drug Resistance, Superinfections, and Stewardship .................................... 42
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Subtopic 1: Principles of Antimicrobial Therapy and
Mechanisms of Action
1. Which class of antibiotics works by inhibiting bacterial cell wall synthesis?
A. Tetracyclines
B. Penicillins
C. Aminoglycosides
D. Macrolides
Correct answer: B. Penicillins
Rationale: Penicillins target the bacterial cell wall by inhibiting peptidoglycan synthesis,
leading to cell lysis and death. This makes them particularly effective against gram-positive
organisms.
2. A nurse is educating a patient on why completing a full course of antibiotics is essential.
What is the primary rationale?
A. To prevent nausea and vomiting
B. To prevent the development of antibiotic resistance
C. To increase white blood cell production
D. To prevent allergic reactions
Correct answer: B. To prevent the development of antibiotic resistance
Rationale: Incomplete antibiotic courses can allow bacteria to survive and develop
resistance, making future infections harder to treat.
3. Which of the following antimicrobial agents is known for causing nephrotoxicity and
ototoxicity?
A. Cephalexin
, 3
B. Gentamicin
C. Erythromycin
D. Amoxicillin
Correct answer: B. Gentamicin
Rationale: Gentamicin, an aminoglycoside, can cause damage to the kidneys and inner
ear, especially with prolonged use or high doses.
4. Which antiviral drug is used primarily to reduce the severity of herpes simplex
outbreaks?
A. Oseltamivir
B. Zidovudine
C. Acyclovir
D. Lamivudine
Correct answer: C. Acyclovir
Rationale: Acyclovir interferes with viral DNA synthesis, making it effective in managing
herpes simplex virus infections.
5. What is the mechanism of action for fluconazole?
A. Inhibits bacterial protein synthesis
B. Inhibits DNA replication
C. Disrupts fungal cell membrane synthesis
D. Inhibits viral entry
Correct answer: C. Disrupts fungal cell membrane synthesis
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Rationale: Fluconazole inhibits the fungal cytochrome P450 enzyme, affecting ergosterol
synthesis, crucial for fungal cell membrane integrity.
6. Which antibiotic class may cause teeth discoloration in children under 8 years old?
A. Macrolides
B. Penicillins
C. Tetracyclines
D. Cephalosporins
Correct answer: C. Tetracyclines
Rationale: Tetracyclines bind to calcium in teeth and bones, leading to permanent
discoloration and delayed bone growth in young children.
7. Which factor contributes most to bacterial resistance?
A. IV route of administration
B. Misuse and overuse of antibiotics
C. Low cost of drugs
D. Proper hand hygiene
Correct answer: B. Misuse and overuse of antibiotics
Rationale: The excessive or inappropriate use of antibiotics leads to selective pressure that
encourages the emergence of resistant strains.
8. What is the priority nursing assessment before initiating IV vancomycin?
A. Vision changes
B. Renal function tests (BUN, creatinine)
C. Respiratory rate
NCLEX PN Exam Bank Antibiotics Antivirals and
Antifungal Agents
Table of Contents
Subtopic 1: Principles of Antimicrobial Therapy and Mechanisms of Action ....................... 2
Subtopic 2: Antibiotic Classes, Side Effects, and Nursing Interventions ............................ 9
Subtopic 3: Antiviral Therapy—Indications, Safety, and Monitoring ................................. 17
Subtopic 4: Antifungal Medications—Systemic and Topical Use, Monitoring, and Safety .. 25
Subtopic 5: Antibiotic Resistance and Nursing Strategies for Prevention ......................... 33
Subtopic 6: Drug Resistance, Superinfections, and Stewardship .................................... 42
, 2
Subtopic 1: Principles of Antimicrobial Therapy and
Mechanisms of Action
1. Which class of antibiotics works by inhibiting bacterial cell wall synthesis?
A. Tetracyclines
B. Penicillins
C. Aminoglycosides
D. Macrolides
Correct answer: B. Penicillins
Rationale: Penicillins target the bacterial cell wall by inhibiting peptidoglycan synthesis,
leading to cell lysis and death. This makes them particularly effective against gram-positive
organisms.
2. A nurse is educating a patient on why completing a full course of antibiotics is essential.
What is the primary rationale?
A. To prevent nausea and vomiting
B. To prevent the development of antibiotic resistance
C. To increase white blood cell production
D. To prevent allergic reactions
Correct answer: B. To prevent the development of antibiotic resistance
Rationale: Incomplete antibiotic courses can allow bacteria to survive and develop
resistance, making future infections harder to treat.
3. Which of the following antimicrobial agents is known for causing nephrotoxicity and
ototoxicity?
A. Cephalexin
, 3
B. Gentamicin
C. Erythromycin
D. Amoxicillin
Correct answer: B. Gentamicin
Rationale: Gentamicin, an aminoglycoside, can cause damage to the kidneys and inner
ear, especially with prolonged use or high doses.
4. Which antiviral drug is used primarily to reduce the severity of herpes simplex
outbreaks?
A. Oseltamivir
B. Zidovudine
C. Acyclovir
D. Lamivudine
Correct answer: C. Acyclovir
Rationale: Acyclovir interferes with viral DNA synthesis, making it effective in managing
herpes simplex virus infections.
5. What is the mechanism of action for fluconazole?
A. Inhibits bacterial protein synthesis
B. Inhibits DNA replication
C. Disrupts fungal cell membrane synthesis
D. Inhibits viral entry
Correct answer: C. Disrupts fungal cell membrane synthesis
, 4
Rationale: Fluconazole inhibits the fungal cytochrome P450 enzyme, affecting ergosterol
synthesis, crucial for fungal cell membrane integrity.
6. Which antibiotic class may cause teeth discoloration in children under 8 years old?
A. Macrolides
B. Penicillins
C. Tetracyclines
D. Cephalosporins
Correct answer: C. Tetracyclines
Rationale: Tetracyclines bind to calcium in teeth and bones, leading to permanent
discoloration and delayed bone growth in young children.
7. Which factor contributes most to bacterial resistance?
A. IV route of administration
B. Misuse and overuse of antibiotics
C. Low cost of drugs
D. Proper hand hygiene
Correct answer: B. Misuse and overuse of antibiotics
Rationale: The excessive or inappropriate use of antibiotics leads to selective pressure that
encourages the emergence of resistant strains.
8. What is the priority nursing assessment before initiating IV vancomycin?
A. Vision changes
B. Renal function tests (BUN, creatinine)
C. Respiratory rate
