Examples · Weight-based dose (mg/kg)
Worked example
Weight-based dose (mg/kg) - practice problem 3
A patient weighs 55 lb. The prescriber orders acetaminophen 12.5 mg/kg/dose.
Weight55 lb
Ordered12.5 mg/kg/dose
Safe max15 mg/kg/dose
How many mg is the dose?
Answer: 312.5 mg
Step-by-step solution
1. Convert the patient's weight to kilograms
55 lb × ( 1 kg ÷ 2.2 lb )
= 25 kg
2. Multiply weight by the ordered mg/kg
25 kg × ( 12.5 mg ÷ 1 kg )
= 312.5 mg
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