A nurse is preparing to administer ceftriaxone 75 mg/kg/day IM in two divided doses to a child who weighs 37 lb. The amount available after reconstitution is ceftriaxone 350 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Answer and Explanation

The Correct Answer is ["1.8 "]

Given:

Desired dose of ceftriaxone: 75 mg/kg/day
Child's weight: 37 lb
Available strength of ceftriaxone after reconstitution: 350 mg/mL

First, convert the child's weight from pounds to kilograms: 37 lb ÷ 2.20462 = 16.78 kg (rounded to the nearest hundredth)

The total daily dose of ceftriaxone:

Total daily dose = Desired dose × Child's weight

Total daily dose = 75 mg/kg/day × 16.78 kg Total daily dose ≈ 1258.5 mg

Since the total daily dose is to be divided into two equal doses, each dose would be:

Each dose = Total daily dose / Number of doses per day Each dose = 1258.5 mg / 2

Each dose = 629.25 mg

The milliliters of ceftriaxone correspond to each dose:

Volume (mL) = Dose / Concentration

Volume (mL) = 629.25 mg / 350 mg/mL Volume (mL) ≈ 1.8 mL

So, the nurse should administer approximately 1.8 mL of ceftriaxone per dose.

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Correct Answer is ["1.8 "]

Explanation

Given:

Desired dose of ceftriaxone: 75 mg/kg/day
Child's weight: 37 lb
Available strength of ceftriaxone after reconstitution: 350 mg/mL

First, convert the child's weight from pounds to kilograms: 37 lb ÷ 2.20462 = 16.78 kg (rounded to the nearest hundredth)

The total daily dose of ceftriaxone:

Total daily dose = Desired dose × Child's weight

Total daily dose = 75 mg/kg/day × 16.78 kg Total daily dose ≈ 1258.5 mg

Since the total daily dose is to be divided into two equal doses, each dose would be:

Each dose = Total daily dose / Number of doses per day Each dose = 1258.5 mg / 2

Each dose = 629.25 mg

The milliliters of ceftriaxone correspond to each dose:

Volume (mL) = Dose / Concentration

Volume (mL) = 629.25 mg / 350 mg/mL Volume (mL) ≈ 1.8 mL

So, the nurse should administer approximately 1.8 mL of ceftriaxone per dose.

A. The total volume of the oral suspension is 250 mL. B. Store the medication in the refrigerator. C. The strength of the oral suspension is 125 mg/mL. D. Shake the bottle well before each use.

Correct Answer is D

Explanation

A. The total volume of the oral suspension is not documented on the drug.

B. The medication is to be stored at temperatures of 20 to 25 degree Celsius. The instructions also state that the drug is not to be frozen. These don’t require refrigeration.
C. The drug contains 125mg/ 5ml and not for every ml.

D. It has been clearly indicated on the drug that it is to be shaken well before use.

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Naxlex Comprehensive Predictor Exams

Correct Answer is ["1.8 "]

Explanation

Which of the following statements about the drug below is true.

Correct Answer is D

Explanation

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