A medicine is prescribed at 24 mg/kg/day for a child weighing 22 kg, divided into four equal doses. The liquid contains 120 mg in 5 mL. How many millilitres should the nurse give per dose?
Correct answer: C. 5.5 mL
- A. 4.5 mL
- B. 5 mL
- C. 5.5 mL
- D. 6 mL
Explanation
The daily dose is 24 × 22 = 528 mg. Each dose is 528 ÷ 4 = 132 mg, and 132 × 5 ÷ 120 = 5.5 mL. The daily dose must be divided before calculating the liquid volume.
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About Drug Calculations and Dosage
Drug calculations apply measurement systems, unit conversions, dosage formulas, tablet and liquid doses, percentage and ratio strength, and weight based dosing. Work also includes calculating IV flow rates, infusion times and doses for children, while distinguishing the prescribed dose from the available concentration.
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