The healthcare provider prescribes 375 mg of intravenous (iv) ampicillin iv every 6 hours for a 5-month-old with a recurrent respiratory infection. the drug is supplied as 500 mg of powder in a vial. the directions state that the powder should be mixed with 1.8 ml of diluent, which yields 250 mg/ml. how many milliliters should the nurse administer? take your answer to one decimal place. ml

The right answer is 1.5 milliliter

Ampicillin is a broad-spectrum beta-lactam antibiotic acting on Gram-positive bacteria and certain Gram-negative bacteria.

We have the concentration (250mg / ml) and the amount of the antibiotic to administer, so we have to look for the volume by the law:

C = n / V ==> V = n / C = 375 (mg) /250 (mg/ml) = 1.5ml

So you should give 1.5 milliliters of antibiotics every six hours for five days.