A nurse is preparing to administer haloperidol 500 mcg PO to a client. How many mg should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Step by step calculation: Determine the dosage required in mcg: 500 mcg Understand the conversion factor: 1 mg = 1000 mcg Use the formula: Weight (mg)=Weight (mcg)1000 Weight (mg)=500 mcg/1000 Calculate the weight: Weight (mg)=0.5