The healthcare provider prescribes an IV bolus of diltiazem 0.25 mg/kg for a client with atrial fibrillation. The client weighs 178 pounds. How many mg should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest whole number.)

To find the mg to administer, we need to multiply the dose per kg by the weight in kg and convert the units from pounds to kg. The dose per kg is 0.25 mg/kg, and the weight in pounds is 178 pounds. The conversion factor from pounds to kg is 0.4536 kg/pound. Therefore, the weight in kg is (178 pounds x 0.4536 kg/pound) = 80.74 kg. The mg to administer is (0.25 mg/kg x 80.74 kg) = 20.19 mg. If rounding is required, we round to the nearest whole number, which is 20 mg.