Vistaril 75 mg IM is ordered for anxiety. Available: 50 mg/mL. How many milliliters will the nurse administer?
1 mL
1.5 mL
2 mL
2.5 mL
The Correct Answer is B
Choice A reason: 1 mL gives 50 mg; this underdoses the 75 mg order, reducing Vistaril’s sedative effect, risking inadequate anxiety relief for the patient.
Choice B reason: 1.5 mL is correct; 75 mg divided by 50 mg/mL equals 1.5 mL, delivering the precise IM dose for effective anxiolytic action safely.
Choice C reason: 2 mL provides 100 mg; this overdoses Vistaril, risking excessive sedation or hypotension, exceeding the ordered therapeutic amount unnecessarily.
Choice D reason: 2.5 mL yields 125 mg; this far exceeds 75 mg, amplifying side effects like drowsiness or respiratory depression, unsafe for anxiety management.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Retailers use trade or generic names; trade isn’t exclusive here, as generics are sold too, making this a shared rather than unique trait.
Choice B reason: Chemical names define molecular structure (e.g., acetaminophen); trade names (e.g., Tylenol) are brand-specific, not tied to chemistry recognition.
Choice C reason: Orders use trade or generic names (e.g., Zestril or lisinopril); trade isn’t the only option, as generics are equally valid in prescriptions.
Choice D reason: Trade names are trademarked (e.g., Viagra); this legal protection distinguishes them from generic or chemical names, ensuring brand exclusivity.
Correct Answer is C
Explanation
Choice A reason: Toxic effects involve overdose symptoms like coma; staying awake isn’t toxicity, as Nembutal’s sedative intent is reversed, not exaggerated, in this reaction.
Choice B reason: Drug allergy causes immune responses (e.g., rash); insomnia isn’t allergic, but a paradoxical effect, differing from hypersensitivity reactions entirely.
Choice C reason: Idiosyncrasy is an unexpected reaction; Nembutal, a barbiturate, should sedate, but wakefulness is an abnormal, individual response, fitting this category precisely.
Choice D reason: Tolerance reduces efficacy over time; this acute, opposite reaction to a sedative isn’t tolerance, but an immediate, unpredictable drug response.
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