A nurse is preparing to administer aspirin 650 mg PO every 12 hours.
The amount available is aspirin 325 mg tablets.
How many tablets should the nurse administer? —
The Correct Answer is ["2"]
Step 1 is: Determine the number of milligrams needed per dose. 650 mg per dose.
Step 2 is: Determine the number of milligrams available per tablet. 325 mg per tablet.
Step 3 is: Calculate the number of tablets to administer. 650 mg ÷ (325 mg/tablet) = 2 tablets. The nurse should administer 2 tablets.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Elevated temperature (fever) is a sign of an infectious or inflammatory process, which typically increases the metabolic demand and often leads to a compensatory increase in heart rate (tachycardia), not a decrease (bradycardia). Bradycardia, defined as a heart rate <60 beats per minute in an adult, may result from various cardiac or non-cardiac causes but is not typically associated with a fever.
Choice B rationale
Fluid volume deficit (hypovolemia) typically stimulates the sympathetic nervous system and the baroreceptor reflex, leading to an increase in heart rate (tachycardia) in an attempt to maintain cardiac output and blood pressure. Severe bradycardia would impair cardiac output and perfusion, but it is not a typical finding or cause of a fluid volume deficit.
Choice C rationale
Lightheadedness, or dizziness, is a common symptom of decreased cerebral perfusion, which occurs when the heart rate is too slow (bradycardia) to maintain adequate cardiac output and blood pressure. Reduced cardiac output directly leads to less oxygenated blood reaching the brain, causing these signs of hypoperfusion.
Choice D rationale
Anxiety activates the sympathetic nervous system, causing the release of epinephrine and norepinephrine. These catecholamines act on beta-adrenergic receptors in the heart, leading to an increase in heart rate (tachycardia). Therefore, anxiety is generally associated with an elevated heart rate, not the decreased heart rate characteristic of bradycardia.
Correct Answer is ["0.5"]
Explanation
Step 1 is: Determine the volume required by dividing the ordered dose by the dose available on the label.
Step 2 is: 25 mg ÷ (50 mg/tab).
Step 3 is: 0.5 tab. The nurse should administer 0.5 tablet(s) per dose.
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