A nurse is preparing to administer phenytoin 300 mg PO every 12 hr to a client who has a seizure disorder. Available is phenytoin oral suspension 125 mg/5 mL. How many mi 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.)

Determine the total daily dosage: The client is prescribed 300 mg of phenytoin every 12 hours. There are 24 hours in a day: 24/12 = 2 times a day. Total daily dosage is 300 mg/dose x 2 doses = 600 mg per day. Calculate the dosage per dose: The medication is to be administered in divided doses every 12 hours. There are 24 hours in a day: 24/12 = 2 times a day. Dosage per dose is 600 mg / 2 doses = 300 mg per dose. Determine the volume per dose: The phenytoin oral suspension contains 125 mg per 5 mL. The nurse needs to administer 300 mg per dose. To find the volume per dose, we can set up a proportion: 125 mg / 5 mL = 300 mg / x mL Cross-multiplying gives us: 125x = 1500 Dividing both sides by 125, we get: x = 12 mL