A nurse is preparing to administer phenytoin 5 mg/kg/day PO divided in equal doses every 12 hr to a school-age child who weighs 38 lb. Available is phenytoin 50 mg chewable tablets. How many tablets should the nurse administer per dose? (Round the answer to the nearest whole number. Us a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["1"]
To calculate the dosage of phenytoin for the child, first convert the child's weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The child weighs 38 lb, which is approximately 17.27 kg (38 lb / 2.2). Next, multiply the child's weight in kilograms by the dosage prescribed: 5 mg/kg/day. For this child, that would be 86.36 mg/day (17.27 kg * 5 mg/kg). Since the dose is divided every 12 hours, the amount per dose would be 43.18 mg (86.36 mg/day divided by 2). With phenytoin 50 mg chewable tablets available, the nurse would administer one tablet per dose.
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Related Questions
Correct Answer is ["50"]
Explanation
To calculate the IV pump setting, you would use the formula: Volume (mL) over Time (hr) = Rate (mL/hr). In this case, the total volume of the cefoxitin solution is 50 mL, and it needs to be administered over 1 hour. Therefore, the nurse should set the IV pump to deliver 50 mL/hr. When rounding to the nearest whole number, the rate remains 50 mL/hr.
Correct Answer is ["13"]
Explanation
To calculate the dosage of acetaminophen liquid required, one must use the formula: (desired dose / available dose) x volume of available dose. For the adolescent who needs 400 mg of acetaminophen, and with the available acetaminophen liquid concentration of 160 mg per 5 mL, the calculation would be: (400 mg / 160 mg) x 5 mL. This simplifies to 2.5 x 5 mL, which equals 12.5 mL.
Answer: 13 mL (rounded off to the nearest whole number)
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