What dosage in g/kg of body weight does a 160. lb man receive if he takes three 200. mg tablets of ibuprofen? How many 100. mg tablets should a 40. lb child take to receive the same dosage?

Answer 1

Conversions:

2.2 lb / kg

1000 mg / g

1000 g / kg

200 mg / 160 lbs = 1.25 mg / lb x 1 g / 1000 mg = 1.25x10^-3 g / lb x 2.2 lbs / kg = 2.75x10^-3 g / kg

40 lbs x 1 kg / 2.2 lbs = 18.18 kg x 2.75x10-3 g / kg = 0.05 g x 1000 mg / g = 50 mg

The child will require 1/2 of a 100 mg tablet