A nurse is preparing to administer nafcillin 25 mg/kg/day IM divided in equal doses every 12 hr to a school-age child who weighs 83 lb. Available is nafcillin injection 250 mg/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.)

Identify the given information: Dose of nafcillin: 25 mg/kg/day Weight of the child: 83 lb Concentration of nafcillin injection: 250 mg/mL Convert the child's weight from pounds to kilograms: 1 lb ≈ 0.453592 kg Calculate the total daily dose of nafcillin in mg: Total daily dose = Dose/kg/day x Weight (kg) Substitute the values: Total daily dose = 25 mg/kg/day x 83 lb x (0.453592 kg/1 lb) Total daily dose ≈ 936.82 mg Calculate the dose per dose (every 12 hours): Dose per dose = Total daily dose / 2 Substitute the values: Dose per dose = 936.82 mg / 2 Dose per dose ≈ 468.41 mg Calculate the volume of nafcillin injection to be administered: Volume = Dose per dose (mg) / Concentration (mg/mL) Substitute the values: Volume = 468.41 mg / 250 mg/mL Volume ≈ 1.87 mL Round the answer to the nearest tenth: Volume ≈ 1.9 mL