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. If rounding is required, round to the nearest tenth.)

Here's how to calculate the total volume (mL) the nurse should administer for the combined medication dose 1. Calculate the volume for each medication: Hydromorphone: Dose: 4 mg (given) Concentration: 10 mg/mL (given) Volume (mL) = Dose (mg) / Concentration (mg/mL) Volume (mL) = 4 mg / 10 mg/mL Volume (mL) = 0.4 mL Hydroxyzine: Dose: 25 mg (given) Concentration: 50 mg/mL (given) Volume (mL) = Dose (mg) / Concentration (mg/mL) Volume (mL) = 25 mg / 50 mg/mL Volume (mL) = 0.5 mL 2. Add the volumes for each medication to find the total volume: Total volume (mL) = Volume of hydromorphone (mL) + Volume of hydroxyzine (mL) Total volume (mL) = 0.4 mL + 0.5 mL Total volume (mL) = 0.9 mL (round to nearest tenth) Therefore, the nurse should administer a total of 0.9 mL.