A nurse is preparing to administer procaine penicillin G 50,000 units/kg IM once daily to a child that weighs 55 lb. The amount available is procaine penicillin G injection 600,000 units/mL. How many mL should the nurse administer? (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 ["2.1"]

To calculate the dosage of procaine penicillin G for the child, first convert the child's weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The child weighs 55 pounds, which is equivalent to 25 kilograms (55 ÷ 2.2). Next, multiply the child's weight in kilograms by the prescribed dosage of 50,000 units/kg, resulting in a total dosage of 1,250,000 units (25 kg × 50,000 units/kg). Finally, divide the total dosage by the concentration of the available medication, 600,000 units/mL, to find the volume to administer. This results in approximately 2.08 mL (1,250,000 units ÷ 600,000 units/mL). Therefore, the nurse should administer 2.1 mL.

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Correct Answer is ["30"]

Explanation

To calculate the dosage of dexamethasone in milliliters for the child, first convert the child's weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The child weighs 66 pounds, which is approximately 30 kilograms (66 / 2.2). According to the prescription, the child requires 0.2 mg of dexamethasone per kilogram per day. So, for a 30 kg child, the total daily dosage is 6 mg (30 kg * 0.2 mg/kg). This total daily dose should be divided into two doses, which means each dose will be 3 mg (6 mg / 2). Given that the available elixir concentration is 0.5 mg per 5 mL, to administer a 3 mg dose, the nurse would need 30 mL of the elixir (3 mg / 0.5 mg * 5 mL). Therefore, the nurse should administer 30 mL per dose.

Correct Answer is ["0.042"]

Explanation

To convert milligrams (mg) to grams (g), one must remember that 1 gram is equivalent to 1000 milligrams. Therefore, to find the equivalent in grams for 42 mg, the amount in milligrams should be divided by 1000. Doing the math, 42 mg divided by 1000 gives 0.042 grams. When rounding this to the nearest thousandth, it remains 0.042, as the fourth decimal place is not significant enough to round up the third decimal place. Hence, 42 mg is equivalent to 0.042 g.

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Naxlex Comprehensive Predictor Exams

Correct Answer is ["30"]

Explanation

A nurse is preparing to administer fluconazole 42 mg PO to an infant. The nurse should recognize that this is equivalent to how many g? (Round the answer to the nearest thousandth. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer is ["0.042"]

Explanation

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