A nurse is caring for a client who is prescribed ciprofloxacin for bacteremia.What is the mechanism of action for this medication?
This medication is bactericidal due to inhibition of an enzyme necessary for DNA replication.
This medication accelerates bacterial growth.
This medication is a diuretic that works on the distal tubule of the nephron.
This medication is a beta-blocker that blocks beta-2 receptors, which results in a lower heart rate and blood pressure.
The Correct Answer is A
Choice A rationale
Ciprofloxacin is a bactericidal antibiotic that works by inhibiting DNA gyrase, an enzyme necessary for DNA replication in bacteria. This prevents bacterial cells from replicating and ultimately leads to their death.
Choice B rationale
Ciprofloxacin does not accelerate bacterial growth; instead, it inhibits growth by preventing DNA replication.
Choice C rationale
Ciprofloxacin is not a diuretic. Diuretics work on the kidneys to increase urine production, but ciprofloxacin targets bacterial DNA replication.
Choice D rationale
Ciprofloxacin is not a beta-blocker and does not lower heart rate or blood pressure. Beta-blockers work by blocking beta-adrenergic receptors in the heart.
Nursing Test Bank
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Related Questions
Correct Answer is A
Explanation
Choice A rationale
Losartan is an angiotensin II receptor blocker (ARB) that helps lower blood pressure by relaxing blood vessels. It is often prescribed for clients who cannot tolerate angiotensin-converting enzyme (ACE) inhibitors like Captopril or Lisinopril due to side effects such as a persistent cough.
Choice B rationale
Digoxin is a medication primarily used to treat heart failure and atrial fibrillation. It is not typically prescribed for the management of hypertension as it does not directly lower blood pressure.
Choice C rationale
Captopril is an ACE inhibitor that can cause a persistent cough in some patients. Since the client has experienced this side effect, it is unlikely that Captopril would be prescribed again.
Choice D rationale
Lisinopril is another ACE inhibitor, similar to Captopril. Given the client's history of a cough caused by ACE inhibitors, Lisinopril is also not a suitable option.
Correct Answer is B
Explanation
Choice A rationale
Calcium channel blockers are used to treat hypertension and angina, not as cytotoxic chemotherapy agents.
Choice B rationale
Antimetabolites are a class of chemotherapy agents that interfere with DNA and RNA synthesis, making them cytotoxic and effective in treating cancer.
Choice C rationale
Diuretics are used to remove excess fluid from the body and are not cytotoxic chemotherapy agents.
Choice D rationale
Antibiotics are used to treat bacterial infections and are not classified as cytotoxic chemotherapy agents.
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