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 C
Explanation
Choice A reason: Recording at shift’s end risks memory errors or omissions; delayed documentation compromises accuracy and legal accountability for controlled substances and patient care.
Choice B reason: Pharmacy technicians don’t administer drugs; nurses document their own actions, ensuring responsibility and precision in the medication administration record.
Choice C reason: Immediate recording post-administration ensures accuracy, timeliness, and compliance with standards; it reflects real-time events, reducing errors in patient care documentation.
Choice D reason: Recording others’ actions is inaccurate and unethical; nurses must document only their administrations, maintaining individual accountability and patient safety.
Correct Answer is A
Explanation
Choice A reason: Therapeutic effects define expected outcomes; knowing these (e.g., pain relief) lets the nurse assess if the drug meets its clinical goal effectively.
Choice B reason: Chemical composition informs structure, not outcome; it’s irrelevant to evaluating if the drug achieves its intended physiological effect directly.
Choice C reason: Mechanism explains how drugs work; it’s useful but secondary to knowing the actual therapeutic result needed for outcome assessment.
Choice D reason: Side effects monitor safety, not efficacy; they don’t directly measure if the drug achieves its primary therapeutic purpose as intended.
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