A provider orders ampicillin 80 mg/kg/day IV divided every 6 hours for a child weighing 4.2 kg. The pharmacy stock is ampicillin 150 mg per 3 mL. What volume in milliliters should the nurse administer per dose? Round your answer to the nearest tenth.

Identify the child's weight and the ordered dosage Child's Weight: 4.2 kg Ordered Dosage: 80 mg/kg/day Calculate the total daily dose in milligrams (mg) Total Daily Dose = Weight × Dosage Total Daily Dose = 4.2 × 80 = 336 mg/day Calculate the dose per administration (Frequency: every 6 hours) Doses per day = 24 ÷ 6 = 4 doses Single Dose (mg) = Total Daily Dose ÷ 4 Single Dose = 336 ÷ 4 = 84 mg Calculate the volume to administer in milliliters (mL) Available Concentration: 150 mg per 3 mL Volume = (Single Dose ÷ Available Dose) × Available Volume Volume = (84 ÷ 150) × 3 Volume = 0.56 × 3 = 1.68 mL Round the final answer to the nearest tenth 1.68 mL rounded = 1.7 mL