Question

A prescription calls for erythromycin 40 mg/kg/day and the patient is a child that weighs 44 pounds. How many mg of erythromycin would the patient need to take per dose if there are 4 doses per day?

A. 2 mg
B. 10 mg
C. 20 mg
D. 40 mg

Answer 1

c. 20 mg because if the child weighs 44 pounds, then it's best to give them 20 mg. Just start counting by two's and it will make more sense.

Answer 2

40 mg/kg/day (20kg)=800 mg/day / 4 doses = 200 mg

44 lbs = 20 kg