The nurse is preparing to administer a medication to a 5-year-old who weighs 35 pounds. The prescribed single dose is 1 to 2 mg/kg/day. Which is the appropriate dose range for this child?
A) 8 to 16 mg
B) 16 to 32 mg
C) 35 to 70 mg
D) 70 to 140 mg
Ans: B
The nurse should convert the child's weight in pounds to kilograms by dividing the child's weight in pounds by 2.2. (35 pounds divided by 2.2 = 16 kg). The nurse would then multiply the child's weight in kilograms by 1 mg for the low end (16 kg × 1 mg = 16 mg) and then by 2 mg for the high end (16 kg × 2 mg = 32 mg).
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