The healthcare provider prescribes ampicillin 140 mg intravenously (IV) every 8 hours for a child with meningitis. The vial is labeled "ampicillin 250 mg for intravenous (IV) use" and requires reconstitution with 83 mL of sterile normal saline for injection to yield a total solution concentration of 30 mg/mL. How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

The healthcare provider prescribes ampicillin 140 mg intravenously (IV) every 8 hours for a child with meningitis. The vial is labeled "ampicillin 250 mg for intravenous (IV) use" and requires reconstitution with 83 mL of sterile normal saline for injection to yield a total solution concentration of 30 mg/mL. This means that for every mL of the solution, there is 30 mg of ampicillin. To administer a dose of 140 mg, the nurse should give the child 4.7 mL of the solution (140 mg ÷ 30 mg/mL = 4.7 mL).