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
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Right patient ensures identity verification; errors here cause harm via misadministration, as drugs affect individuals differently based on physiology and condition.
Choice B reason: Right drug prevents wrong medication errors; each drug’s pharmacokinetics targets specific issues, and mistakes disrupt therapy or cause adverse reactions.
Choice C reason: Color isn’t a standard right; it’s not a reliable identifier, as formulations vary, and clinical safety relies on name, dose, and route, not appearance.
Choice D reason: Right route ensures correct delivery (e.g., IV vs. oral); wrong routes alter bioavailability and onset, risking toxicity or inefficacy per drug design.
Choice E reason: Right time optimizes efficacy; timing aligns with drug half-life and patient needs, preventing under- or overdosing from improper administration schedules.
Correct Answer is A
Explanation
Choice A reason: IM injections use a 90-degree angle; this ensures deep muscle penetration for average-weight adults, optimizing drug absorption into vascular tissue.
Choice B reason: 45 degrees is for subcutaneous injections; it’s too shallow for IM, risking fat deposition instead of muscle, reducing efficacy in this context.
Choice C reason: 15 degrees is far too shallow; it’s not a standard angle, likely depositing drug in skin layers, failing to reach muscle for intended absorption.
Choice D reason: 25 degrees mimics subcutaneous; it doesn’t reach muscle depth, compromising IM delivery and therapeutic effect in an average-weight client.
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