The physician orders Zestril 15 mg po daily for hypertension. The medication is supplied in 5-mg tablets. How many tablets will the nurse administer?

1 tablet

2 tablets

3 tablets

4 tablets

Answer and Explanation

The Correct Answer is C

Choice A reason: One 5-mg tablet provides only 5 mg, far below the 15 mg ordered; this underdose fails to control hypertension effectively, risking cardiovascular complications like stroke or heart failure.

Choice B reason: Two tablets yield 10 mg, still short of 15 mg; this insufficient dose wouldn’t achieve therapeutic blood pressure reduction, leaving the patient at risk for hypertensive damage.

Choice C reason: Three 5-mg tablets equal 15 mg, matching the order precisely; this dose effectively inhibits angiotensin-converting enzyme, lowering blood pressure to a therapeutic range safely.

Choice D reason: Four tablets deliver 20 mg, exceeding the order; this overdose could cause hypotension, dizziness, or renal impairment due to excessive ACE inhibition beyond therapeutic needs.

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Correct Answer is C

Explanation

Choice A reason: Informing the patient is secondary; it addresses communication but not immediate safety risks like needlestick injury, which is a higher priority post-injection per occupational health standards.

Choice B reason: Assessing comfort is important but not urgent; pain evaluation can wait after securing the needle, as safety from sharps exposure outweighs immediate patient feedback in priority.

Choice C reason: Engaging the safety sheath prevents needlestick injuries; it’s the priority action to protect the nurse and others from bloodborne pathogens, aligning with universal precautions post-injection.

Choice D reason: Checking for bleeding is routine but not critical; minor oozing is common and manageable later, while needle safety is an immediate concern to prevent infection risks.

A. Lungs B. Liver C. Kidney D. Colon

Correct Answer is B

Explanation

Choice A reason: Lungs excrete volatile drugs like anesthetics; most medications aren’t metabolized here, as they lack the cytochrome enzymes needed for broad drug breakdown.

Choice B reason: The liver is the primary site; cytochrome P450 enzymes metabolize most drugs, converting them into active or excretable forms, critical for pharmacokinetics.

Choice C reason: Kidneys excrete metabolites; they filter, not metabolize, most drugs, relying on prior liver processing, making them secondary in the metabolic pathway.

Choice D reason: The colon absorbs some drugs but doesn’t metabolize most; its role is minimal compared to the liver’s extensive enzymatic drug transformation capacity.

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The physician orders Zestril 15 mg po daily for hypertension. The medication is supplied in 5-mg tablets. How many tablets will the nurse administer?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is C

Explanation

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Correct Answer is B

Explanation

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