A nurse is preparing to administer cephalexin 25 mg/kg/day PO divided in equal doses every 6 hr to a toddler who weighs 26 lb. Available is cephalexin suspension 250 mg/5 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 ["1.5"]

To calculate the dosage of cephalexin for the toddler, first convert the weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The toddler weighs 26 lb, which is approximately 11.82 kg (26 / 2.2 = 11.82). Next, calculate the daily dose in milligrams using the prescribed dose of 25 mg/kg/day: 11.82 kg * 25 mg/kg/day = 295.5 mg/day. Since the medication is to be divided into equal doses every 6 hours, there will be four doses per day. Therefore, the dose per administration is 295.5 mg/day divided by 4, which equals 73.875 mg/dose. Now, using the concentration of the cephalexin suspension (250 mg/5 mL), calculate the volume of suspension needed per dose: 73.875 mg * (5 mL / 250 mg) = 1.4775 mL. Rounded to the nearest tenth, the nurse should administer 1.5 mL per dose.

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Correct Answer is ["1"]

Explanation

The conversion of milliliters to teaspoons is a common calculation in medical dosing. For the administration of 5 mL of digoxin elixir PO, the equivalent in teaspoons would be approximately 1.01442 teaspoons. When rounding to the nearest whole number, as per medical dosing guidelines which often require precise measurements to ensure safety, the amount would be 1 teaspoon. It's important to use a leading zero if it applies to indicate less than one, and not to use a trailing zero as it could be mistaken for a larger dose. Therefore, the nurse should recognize that 5 mL is equivalent to 1 teaspoon.

Correct Answer is ["0.2"]

Explanation

To calculate the amount of enoxaparin to administer, you would use the formula: (desired dose ÷ available dose) × available volume. For this scenario, it would be (20 mg ÷ 30 mg) × 0.3 mL, which equals 0.2 mL.

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Naxlex Comprehensive Predictor Exams

A nurse is preparing to administer 5 mL of digoxin elixir PO to a toddler. The nurse should recognize that this is equivalent to how many tsp? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Correct Answer is ["1"]

Explanation

A nurse is preparing to administer enoxaparin 20 mg subcutaneously to a school-age child. The amount available is enoxaparin 30 mg/0.3 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.)

Correct Answer is ["0.2"]

Explanation

A nurse is preparing to administer methylphenidate 10 mg PO. Available is methylphenidate oral solution 5 mg/tsp. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

A nurse is administering prochlorperazine 0.13 mg/kg IM to a child who weighs 55 lb. Available is prochlorperazine injection 5 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

A nurse is preparing to administer dimercaprol 3 mg/kg IM to an adolescent who weighs 79 lb. Available is dimercaprol injection 100 mg/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.)

A nurse is preparing to administer triamcinolone 40 mg IM to a child. Available is triamcinolone 80 mg/mL. What is the total mL the nurse should administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)