A nurse is preparing to administer liquid ibuprofen to a school-age child. The prescription reads 200 mg every 8 hr. The amount available is 100 mg/5 mL. How many mL of ibuprofen should the nurse administer over a 24-hr period? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

To calculate the dosage of ibuprofen in milliliters for a 24-hour period, we start by determining the total milligrams required per day. Since the prescription is for 200 mg every 8 hours, the child will need three doses in 24 hours (200 mg x 3 = 600 mg). Next, we convert the total milligrams into milliliters using the concentration provided. The formula is: (Total mg needed / Concentration of mg) x Volume of each concentration = Total mL. Plugging in the numbers: (600 mg / 100 mg) x 5 mL = 30 mL.