The patient is delivered by cesarean section under general anaesthesia. The baby and placenta are easily delivered, but the uterus is noted to be boggy and atonic despite the intravenous infusion of Pitocin. All of the following are appropriate agents to use next Except
Methylergonovine (Methergine) administered intramuscularly Prostaglandin F2a intramuscularly Misoprostol (Cytotec) suppositories Terbutaline administered intravenously