The patient is a 13-year-old with a severe throat infection. The patient weighs 45 kg.Ordered: Erythromycin 650 mg PO q8h for 7 daysOn hand: See labelDetermine if the dose is safe. If it is safe, calculate the amount to administer: ________. If the dose is not safe, write: not safe. 
Fill in the blank(s) with the appropriate word(s).
16.3 mL
Determine if the dose is safe:
According to the label, the usual dose for children is 30-50 mg/kg/day in divided doses. The maximum dose for this patient would be 45 kg × 50 mg/kg = 2,400 mg per day. Divide this by the number of daily doses: 
mg per dose. The prescribed dose is less than 800 mg, so the dose is safe.
Calculate the amount to administer:
H = 200 mg; Q = 5 mL; D = 650 mg 
A = 3.25 × 5 mL
A = 16.25 mL, rounded to 16.3 mL
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