CHANGE to diphenhydramine. A nurse is given an order to give…

CHANGE to diphenhydramine. A nurse is given an order to give promethazine 25mg IVP administered slowly over 15 minutes. They have available a 50mg/mL vial of promethazine and know that they must dilute the dose to prevent tissue damage and irritation. According to hospital policy they must dilute the promethazine to 1.25mg/mL with NS. How many milliliters (mL) of NS must the nurse add to the promethazine dose to dilute it to 1.25mg/mL? Please round the final answer to one decimal place, except no trailing zeros.    mL