The nurse is caring for a woman during the first hour of the…

The nurse is caring for a woman during the first hour of the fourth stage of labor who is experiencing persistent uterine atony despite administration of Pitocin and Misoprostol (Cytotec). The woman’s history reveals she has asthma, had a previous postpartum hemorrhage with her first child and was induced for this delivery due to pregnancy induced hypertension. The nurse should plan to administer which drug from this woman’s medication orders?