Question

A 41.5 lb child has a Streptococcus infection. Amoxicillin is prescribed at a dosage of 45 mg per kg of body weight per day given b.i.d. How many milligrams of amoxicillin should be given at each administration?

Answer 1

424.8 mg.

Step-by-step explanation:

divide the weight in pounds by 2.2046 to get the weight in kilograms.

41.5 lb / 2.2046 = 18.88 kg

multiply the weight of the child in kg by the prescribed dose of 45 mg/kg per day.

18.88 kg * 45 mg/kg = 849.6 mg per day

Amoxicillin is prescribed to be given twice a day, so divide it by 2.

849.6 mg / 2 = 424.8 mg per administration

Therefore, Amoxicillin should be given to the child twice a day, and each administration should be 424.8 mg.

Answer 2

To determine the amount of amoxicillin to be given at each administration, convert the child's weight from pounds to kilograms. Multiply the weight by the prescribed dosage of 45 mg/kg per day and divide by 2 since the medication needs to be given twice a day. The dosage per administration is therefore 425.065 mg.

Step-by-step explanation:

To determine the amount of amoxicillin that should be given at each administration, we need to convert the weight of the child from pounds to kilograms.

Conversion: 1 lb = 0.4536 kg

Weight of the child in kg = 41.5 lb x 0.4536 kg/lb = 18.814 kg (rounded to three decimal places)

Now we multiply the weight of the child by the prescribed dosage:

Dosage per day = 45 mg/kg x 18.814 kg = 850.13 mg (rounded to three decimal places)

Since the medication needs to be given twice a day (b.i.d), we divide the daily dosage by 2:

Dosage per administration = 850.13 mg / 2 = 425.065 mg (rounded to three decimal places)

Therefore, 425.065 mg of amoxicillin should be given at each administration.