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 \(1\space kg = 2.2\space lb\), then \(weight\space in\space kg=\frac{53.9}{2.2}=24.5\space kg\)

Step2: Calculate the daily dose range

The daily dose range is \(4\space mg/kg/day\times24.5\space kg = 98\space mg/day\) (lower - bound) and \(6\space mg/kg/day\times24.5\space kg=147\space mg/day\) (upper - bound)

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

The single - dose range is \(\frac{98}{2}=49\space mg\) (lower - bound) and \(\frac{147}{2}=73.5\space mg\) (upper - bound)

Answer:

C. \(75\space mg\)