The nurse is preparing medication for a 30-month-old child with otitis media in the right ear. The child weighs 33 pounds. The physician has ordered Keflex, 50 mg/kg/d in equally divided doses every 8 hours
The medication concentration is 250 mg/5 mL. How many milliliters should the nurse give the toddler for each dose?
5 mL
Feedback:
To calculate the correct dosage, the nurse first converts the child's weight from pounds to kilograms by dividing weight in pounds by 2.2 (2.2 lb = 1 kg). 33 pounds ÷ 2.2 pounds/kg = 15 kg. The child is to receive 50 mg for every kilogram. To determine this child's dosage multiply weight times daily dose (15 kg × 50 mg/kg = 750 mg). Thus, 750 mg is to be administered in equally divided dosages every 8 hours, or 3 times a day. 750 mg ÷ 3 = 250 mg/dose. There is 250 mg in 5 mL of medication so the patient would be given 5 mL.
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