A nurse is preparing to administer phenytoin 15 mg/kg PO as a loading dose to a client who weighs 264 lb. How many mg should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Convert weight from pounds (lb) to kilograms (kg): We know 1 kg is equal to 2.2 lb. Client's weight (kg) = 264 lb / 2.2 lb/kg = 120 kg (rounded to nearest whole number) Calculate total phenytoin dosage: Dosage (mg) = Client's weight (kg) × Dosage per kg (mg/kg) Dosage (mg) = 120 kg × 15 mg/kg Dosage (mg) = 1800 mg Round the answer to the nearest whole number: Rounded dosage = 1800 mg Therefore, the nurse should administer 1800 mg of phenytoin.