A nurse is preparing to administer diclofenac sodium 200 mg PO daily in equally divided doses every 6 hr. How many mg should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Total daily dose = 200 mg. Determine the number of doses per day. The medication is given every 6 hours. Number of doses per day = 24 hours/day / 6 hours/dose = 4 doses. Calculate the dose to be administered per dose. Dose per administration (mg) = Total daily dose (mg) / Number of doses per day = 200 mg / 4 = 50 mg.