A child who weighs 25 kg receives a prescription for methylprednisolone 0.5 mg/kg/day to be given intramuscularly in divided doses every 12 hours. The medication is available in a 20 mg/mL. How many mL should the nurse administer with each dose? (Enter numerical value only. If rounding is required, round to the tenth.)
The Correct Answer is ["0.3"]
Step 1: Calculate total daily dose
Total daily dose (mg) = Weight (kg) × Dose (mg/kg/day)
= 25 × 0.5
= 12.5 mg/day
Step 2: Determine dose per administration
The medication is given every 12 hours → 2 doses/day
Dose per administration = Total daily dose ÷ 2
= 12.5 ÷ 2
= 6.25 mg per dose
Step 3: Convert mg to mL using concentration
Volume (mL) = Dose ÷ Concentration
= 6.25 ÷ 20
Step 4: Calculate
= 0.3125 mL
Step 5: Round to the nearest tenth
≈ 0.3 mL
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