Frank, a 60lb bulldog, needs to receive 60 mg of Prednisone once every other day for 10 days. How many total milligrams of Prednisone does Frank need for 10 days?

• A. 900 mg
• B. 450 mg
• C. 100 mg
• D. 300 mg

Answer: (D)

Dosing every other day means you give a dose on days 1, 3, 5, 7, and 9 within a 10-day window, for a total of five administrations. Each administration is 60 mg, so the total amount needed is 5 × 60 mg = 300 mg. The weight given isn’t needed for this calculation since the problem specifies a fixed dose per administration. If the period were 11 days, there would be six doses.