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. 10 mg
B. 200 mg
C. 2 mg
D. 40 mg

Answer 1

B

Explanation:

We know 2.2 pounds = 1 kg, hence,

44 pounds / 2.2 = 20 kg (weight of child in kg)

Now, since 40 mg is administered per kg, the child would need 40 * 20 = 800 mg PER DAY

Since this is going to be taken per 4 dose, each dose would need to be 800/4 = 200 mg

Answer choice B is right.