Carbetocin (CAS 37025-55-1) is a high-purity, long-acting synthetic oxytocin analog peptide API with a molecular formula of C45H69N11O12S and a molecular weight of 988.17. As a selective oxytocin receptor agonist, it binds specifically to oxytocin receptors on uterine smooth muscle, triggering rhythmic contractions to enhance uterine tone and frequency, which is highly effective in preventing uterine atony and postpartum hemorrhage after cesarean section or vaginal delivery. It also promotes uterine involution in the early postpartum period, with a longer duration of action than natural oxytocin (about 1 hour of sustained uterine activity after a single dose).
