Question

the hcp has ordered cefixime for your pediatric patient to treat her tonsilitis. the recommended dosage: cefixime 4 mg to 6 mg/kg/day po q12h which of the following doses would be a safe effective single dose for a child weighing 53.9 lb? a 50 mg b 147 mg c 75 mg d 98 mg

Explanation:

Step1: Convert weight from pounds to kilograms

Since \(1\ kg = 2.2\ lb\), the weight of the child in kilograms is \(w=\frac{53.9}{2.2}=24.5\ kg\)

Step2: Calculate the daily dosage range

The lower - bound of the daily dosage: \(d_{min}=4\times24.5 = 98\ mg\)
The upper - bound of the daily dosage: \(d_{max}=6\times24.5=147\ mg\)

Step3: Calculate the single - dose range (q12h means 2 doses per day)

The lower - bound of the single - dose: \(s_{min}=\frac{98}{2}=49\ mg\)
The upper - bound of the single - dose: \(s_{max}=\frac{147}{2}=73.5\ mg\)

Answer:

C. \(75\ mg\)