The physician orders vancomycin 400 mg oral every 6 hours for a child weighing 90 lb. The vancomycin is available in a 250 mg/5 mL concentration. The recommended dose is 40 mg/kg/24 h divided in four divided doses.
a. What is the child’s weight in kilograms? _____________
b. How many milligrams per kilogram per 24 hours is the patient receiving? ______________
c. Is the order safe? ___________________
d. If yes, how many milliliters are needed for each dose? ______________