A child who weighs 42 kg receives a prescription for methylprednisolone succinate 1.5 mg/kg/day IV in divided doses every 6 hours. The medication is available in "Methylprednisolone succinate 40 mg/mL vials." How many mL should the nurse administer with each dose? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Calculation: Calculate the total daily dose in milligrams: Total daily dose (mg) = Prescribed dose (mg/kg/day) x Child's weight (kg) = 1.5 mg/kg/day x 42 kg = 63 mg/day Determine the number of doses per day: Number of doses per day = 24 hours / Frequency of doses (hours) = 24 hours / 6 hours/dose = 4 doses/day Calculate the dose to administer with each dose: Dose per administration (mg) = Total daily dose (mg) / Number of doses per day = 63 mg / 4 doses = 15.75 mg Calculate the volume to administer with each dose in mL: Volume per dose (mL) = Desired dose (mg) / Available concentration (mg/mL) = 15.75 mg / 40 mg/mL =0.39375 mL Round to the nearest tenth: = 0.4 mL