Question

When Ibuprofen is given for fever to children 6 months of age up to 2 years, the usual dose is 5 milligrams (mg) per kilogram (kg) of body weight when the fever is under 102.5 degrees Fahrenheit. How much medicine would be usual dose for a 18 month old weighing 18 pounds? milligrams

Answer 1

First let’s confirm that the 18 month old is in the age range for the dose they gave. (It is)

Then convert 18 pounds into kg
1 pound = 0.454 kg
18 pounds = 18 • 0.454 = 8.172 kg

Now how many mg of medication for 8.172kg?

5mg/1 kg = x mg/8.172
Cross multiply
5 • 8.172 = 40.86 mg is the dose

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