Question 1

Which of the following best explains why aminoglycosides are not typically administered orally for systemic infections?

Accepted Answer

They are poorly absorbed from the gastrointestinal tract.

Question 2

A patient is being treated for septicemia with gentamicin. Which of the following adverse effects should the nurse monitor for due to the drug's accumulation in specific tissues?

Accepted Answer

Nephrotoxicity and ototoxicity

Question 3

Which of the following is a key difference between aminoglycosides and fluoroquinolones regarding their spectrum of activity and absorption?

Accepted Answer

Aminoglycosides are mainly active against gram(−) bacteria and are poorly absorbed orally; fluoroquinolones are active against both gram(−) and gram(+) bacteria and are well absorbed orally.

Question 4

A 25-year-old woman with a urinary tract infection is prescribed ciprofloxacin. Which of the following is a contraindication for this medication?

Accepted Answer

Concurrent use of tizanidine

Question 5

Which of the following best describes the mechanism of action of aminoglycosides?

Accepted Answer

Penetrate bacterial cell walls and inhibit protein synthesis necessary for function and replication

Question 6

A patient with endocarditis is prescribed an aminoglycoside in combination with a beta-lactam antibiotic. What is the primary rationale for this combination therapy?

Accepted Answer

To broaden the antimicrobial spectrum and achieve synergistic bactericidal effects

Question 7

Which of the following best explains why fluoroquinolones are not recommended for use in children under 18 years of age?

Accepted Answer

They are associated with adverse effects on cartilage development.

Question 8

A patient with abnormal kidney function is prescribed gentamicin. Which of the following is the most important consideration for dosing this medication?

Accepted Answer

Monitor serum concentrations and adjust the dose to prevent toxicity.

Question 9

Which of the following statements about the excretion of aminoglycosides is correct?

Accepted Answer

They are excreted unchanged in the urine when given parenterally.

Question 10

A patient is receiving a fluoroquinolone for a bone infection. Which of the following best describes the drug's mechanism of action?

Accepted Answer

Inhibits bacterial DNA enzyme synthesis required for growth and development

Question 11

A patient with hepatic coma is prescribed an oral aminoglycoside. What is the primary reason for this route of administration in this scenario?

Accepted Answer

To exert a local effect in the gastrointestinal tract

Question 12

Which of the following is a recommended strategy to reduce the risk of aminoglycoside toxicity in patients?

Accepted Answer

Keep patients well hydrated and monitor for early signs of toxicity

Question 13

A 60-year-old patient with diabetes mellitus is prescribed a fluoroquinolone for a soft tissue infection. Which of the following should be considered when selecting this drug?

Accepted Answer

The specific organism causing the infection and potential for resistance

Question 14

Which of the following best explains why resistance to fluoroquinolones has increased in organisms such as Pseudomonas aeruginosa and Staphylococcus aureus?

Accepted Answer

Overuse and inappropriate prescribing of fluoroquinolones

Question 15

A patient is prescribed a single daily dose of an aminoglycoside. Which of the following best describes the rationale for this dosing strategy?

Accepted Answer

To maximize bactericidal activity while minimizing toxicity

Question 16

Which of the following is a correct statement regarding the metabolism and excretion of fluoroquinolones?

Accepted Answer

They are metabolized mainly in the kidneys, with some hepatic metabolism, and 30% to 60% of the oral dose is excreted unchanged in urine.

Question 17

A patient is scheduled for pre-operative bowel surgery. Which of the following is the most appropriate use of an aminoglycoside in this context?

Accepted Answer

To suppress intestinal bacteria via oral administration

Question 18

Which of the following best describes the distribution of aminoglycosides after parenteral administration?

Accepted Answer

They are widely distributed in extracellular fluids, including blood, urine, bone, and inflamed joints.

Question 19

A patient with a history of hypersensitivity to fluoroquinolones presents with a respiratory tract infection. Which of the following is the most appropriate action?

Accepted Answer

Select an alternative antibiotic class

Question 20

A patient is being treated with an aminoglycoside for osteomyelitis. Which of the following best describes the monitoring required during therapy?

Accepted Answer

Monitor both peak and trough serum concentrations to ensure efficacy and minimize toxicity

Drug Therapy with Aminoglycosides and Fluoroquinolones: Mechanisms, Indications, and Clinical Principles

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