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The nurse is preparing to administer ampicillin PO to a 12-year-old child with impetigo who weighs 88 pounds. The prescription is for 50 mg/kg/day. How many mg should the child receive per day? (Enter numeric value only.)
Answer and Explanation

The Correct Answer is ["2000"]

Here's how to calculate the total milligrams of ampicillin the child should receive per day:

Convert child's weight to kilograms:

Weight (kg) = Weight (lbs) / Conversion factor (lbs/kg)

Weight (kg) = 88 lbs / 2.205 lbs/kg

Weight (kg) = 40 kg (round to nearest whole number)

Calculate the total daily dosage:

Daily dosage (mg) = Dose per kg (mg/kg/day) * Weight (kg)

Daily dosage (mg) = 50 mg/kg/day * 40 kg

Daily dosage (mg) = 2000 mg

Therefore, the child should receive 2000 mg of ampicillin per day.


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Related Questions

Correct Answer is ["2.4"]

Explanation

Here's how to calculate the volume (mL) the nurse should administer for cefazolin:

1. We know the following:

Prescribed dose: 800 mg cefazolin IM every 6 hours (given)

Vial content: 1 gram cefazolin (given)

However, we need to consider the reconstitution process for accurate dosage calculation.

Reconstitution information:

For IM use, add 2.5 mL sterile water for injection.

This dilution creates a total volume of 3.0 mL.

3. We need to find the concentration of cefazolin in the reconstituted solution (mg/mL).

Concentration (mg/mL) = Total drug amount (mg) / Total volume (mL) after reconstitution

Concentration (mg/mL) = 1 gram (which is 1000 mg) / 3.0 mL

Concentration (mg/mL) = 333.33 mg/mL (round to nearest tenth)

4. Now, we can find the volume to administer for the prescribed dose (800 mg) considering the concentration (333.33 mg/mL) in the reconstituted solution.

Volume to administer (mL): Dose (mg) / Concentration (mg/mL)

Volume to administer (mL): 800 mg / 333.33 mg/mL

Volume to administer (mL): 2.40 mL (round to nearest tenth)

Therefore, the nurse should administer approximately 2.4 mL of the reconstituted cefazolin solution intramuscularly.

Correct Answer is ["4.8"]

Explanation

The vial is labeled as “100 mg per 4 mL.”

This means that each mL contains 25 mg of the medication (100 mg / 4 mL = 25 mg/mL).

The nurse needs to administer 120 mg of the medication.

To find out how many mL this is, we divide the dose by the concentration:

VolumeinmL = 120mg / 25mg/mL ​ = 4.8mL

If rounding is required to the nearest tenth, the nurse should administer 4.8 mL of the medication.

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