The nurse is preparing a client's dose of an IM analgesic in a single syringe. The prescription is hydromorphone 4 mg and hydroxyzine 25 mg. The hydromorphone is available in a 10 mg/ml ampule, and the hydroxyzine is available in a 50 mg/ml, vial. How many total mL should the nurse administer? (Enter the numeric value only it rounding is required, round to the nearest tenth.)

Given Information: Hydromorphone dose: 4 mg Hydromorphone concentration: 10 mg/mL Hydroxyzine dose: 25 mg Hydroxyzine concentration: 50 mg/mL Calculate the volume of hydromorphone Volume of hydromorphone = Hydromorphone dose / Hydromorphone concentration Volume of hydromorphone = 4 mg / 10 mg/mL = 0.4 mL Calculate the volume of hydroxyzine Volume of hydroxyzine = Hydroxyzine dose / Hydroxyzine concentration Volume of hydroxyzine = 25 mg / 50 mg/mL = 0.5 mL Calculate the total volume Total volume = Volume of hydromorphone + Volume of hydroxyzine Total volume = 0.4 mL + 0.5 mL = 0.9 mL