Examples · Weight-based dose (mg/kg)
Worked example
Weight-based dose (mg/kg) - practice problem 13
A patient weighs 33 lb. The prescriber orders cefazolin 50 mg/kg/dose.
Weight33 lb
Ordered50 mg/kg/dose
Safe max50 mg/kg/dose
How many mg is the dose?
Answer: 750 mg
Step-by-step solution
1. Convert the patient's weight to kilograms
33 lb × ( 1 kg ÷ 2.2 lb )
= 15 kg
2. Multiply weight by the ordered mg/kg
15 kg × ( 50 mg ÷ 1 kg )
= 750 mg
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