An infant ibuprofen suspension contains 100 mg/5.0mL suspension. The recommended dose is 10 mg/kg body weight. How many milliliters of this suspension should be given to an infant weighing 25 lb?

Converts the 25 lb to kg

multiply the kilograms by the dose (10 mg/kg)

multiply the amount of ibuprofen by the conversion factor of the concentration of the suspension to calculate the mL

25 lb x 0.453592 kg/1lb = "A kg"

A kg x 10 mg/kg = B mg

B mg x 5.0 mL / 100 mg = "C mL of suspension"