Postpartum hemorrhage is a major cause of maternal morbidity and mortality worldwide. Carbetocin have been shown effective in the prevention of uterine atony, which is the leading cause of postpartum hemorrhage. The Society of Obstetricians and Gynecologists of Canada recommends a single 100 mcg dose of carbetocin after elective cesarean delivery to prevent postpartum hemorrhage. However, there is no clear data in the literature regarding the lowest effective dose of carbetocin that should be administered. The use of the minimum effective dose of carbetocin may reduce its side effects, including hypotension, tachycardia, nausea, vomiting and flushing.