A nurse is preparing to administer methimazole 0.3 mg/kg/day PO divided in equal doses every 8 hr to a school-age child who weighs 55 lb. Available is methimazole 5 mg tablets. How many tablets should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Convert the child's weight from pounds to kilograms: 55 lb÷2.2=25 kg. Calculate the total daily dose in mg: 0.3 mg/kg/day×25 kg=7.5 mg/day. Determine the dose per administration: The medication is to be given every 8 hours, which equals 3 doses per day. 7.5 mg/day÷3=2.5 mg/dose. Calculate the number of tablets per dose: Each tablet contains 5 mg. 2.5 mg÷5 mg/tablet=0.5 tablets. Round to the nearest tenth: 0.5 tablets