Definition Most common cause of postpartum hemorrhage. Treated with synthetic oxytocins (ex. oxytocin injection, Pitocin®), which do NOT contain vasopressin – if given rapidly (ex. 10 U Pitocin® rapidly, despite that the manufacture recommends only 5 U slowly), these agents can cause vasodilation/hypotension and tachycardia [Pinder AJ et al. Int J Obstetr Anesth 11: 156, […]