The physician orders acetaminophen (Tylenol) 15 mg/kg q4 hours PRN (as needed) for pain. The drug is supplied with 160 mg/5 mL. The infant weighs 12 pounds. How many milliliter of medication will the nurse administer?
A) 2.5 mL
B) 5.6 mL
C) 12.4 mL
D) 10.7 mL
A
Feedback:
Begin by converting the infant's weight to kilograms (12 pounds ÷ 2.2 pounds/kg = 5.45 kg). The order says to give 15 mg/kg. To determine this child's dosage multiply weight and 15 mg/kg (5.45 kg × 15 mg/kg = 81.75 mg/dose). Finally, use the ratio and proportion method to calculate how to prepare the medication: 160 mg/5 mL = 81.75 mg/X mL; cross-multiplying yields 2.5 mL.
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