Question

The strength of Kefexin oral suspension is 100 mg/ml. Nora has been prescribed cefalexin at a dose of 50 mg/kg/day divided in two single doses. Nora weighs 14 kg. How many milliliters of solution for Nora should be given as a single dose?

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Jett

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To calculate the number of milliliters (ml) of Kefexin oral suspension that Nora should be given for a single dose, you can follow these steps:
Determine the total daily dose for Nora:
Nora's weight is 14 kg, and she has been prescribed a dose of 50 mg/kg/day. So, the total daily dose for Nora is:
Total Daily Dose = Weight (kg) × Dose (mg/kg/day)
Total Daily Dose = 14 kg × 50 mg/kg/day
Total Daily Dose = 700 mg/day
Since she is to be given the total daily dose divided into two single doses, you need to calculate the dose for a single administration:
Dose per Single Administration = Total Daily Dose / Number of Doses per Day
Dose per Single Administration = 700 mg / 2
Dose per Single Administration = 350 mg
Now, you need to convert the dose from milligrams (mg) to milliliters (ml) using the concentration of the oral suspension, which is 100 mg/ml:
Dose in Milliliters = Dose in Milligrams / Concentration (mg/ml)
Dose in Milliliters = 350 mg / 100 mg/ml
Dose in Milliliters = 3.5 ml
So, Nora should be given 3.5 milliliters of Kefexin oral suspension for each single dose.

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