A nurse is preparing administer valproic acid 125 mg PO. Available is valproic acid syrup 250 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["2.5"]
Determine the desired dosage:
The nurse needs to administer 125 mg of valproic acid.
Determine the volume per dose:
The valproic acid syrup contains 250 mg per 5 mL.
The nurse needs to administer 125 mg per dose.
To find the volume per dose:
250 mg / 5 mL = 125 mg / x mL
Cross-multiplying gives us:
250x = 625
Dividing both sides by 250, we get:
x = 2.5 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Take 0.5 oz 30 minutes before meals and at bedtime:
The unit "oz" (ounce) is not a metric unit. Ounces are part of the imperial measurement system, not the metric system. The metric equivalent of ounces for liquid measurements would be milliliters (mL). Therefore, this prescription is using an imperial unit.
B. Take 1 tsp four times daily:
The unit "tsp" stands for teaspoon, which, although used in common medical practice, is not a metric unit. A teaspoon is a unit of volume in the U.S. customary system, equivalent to approximately 5 mL in the metric system. However, teaspoons themselves are not part of the metric system, so this instruction is not using a metric unit.
C. Take 2 drops four times daily:
The unit "drops" is a non-metric unit of measurement and is used to describe small volumes of liquid, often in medication dosages. While the exact volume of a drop can vary depending on the liquid and dropper, it is not a metric measurement.
D. Take 15 mL, 1 hr after meals and at bedtime:
The unit "mL" stands for milliliters, which is a metric unit of volume. The prescription specifically uses the metric system for dosage measurement, making it the correct option. Milliliters are the standard unit for measuring liquid medications in the metric system.
Correct Answer is ["1.6"]
Explanation
Determine the desired dosage:
The nurse needs to administer 480 mcg of filgrastim.
Determine the volume per dose:
The filgrastim injection contains 300 mcg per 1 mL.
The nurse needs to administer 480 mcg per dose.
To find the volume per dose:
300 mcg / 1 mL = 480 mcg / x mL
Cross-multiplying gives us:
300x = 480
Dividing both sides by 300, we get:
x = 1.6 mL
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