Question

The nurse practitioner orders cephalexin 0.75 g p.o. q.6h. for a child with otitis media who weighs 55 lb. The drug reference
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Answer #1

b

Step 1 convert pounds to kg by dividing the mass value by 2.205

55lbs/2.205=24.9=25kg

step 2

18.75mg/kg*25kg=468.75mg/day

25mg/kg*25kg=625mg/day

step 3

convert to 0.75 g to mg=750mg

So it is not safe,the safe dose is between 468.75mg to 625mg.

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