Due to oxytocin's close sequence homology with vasopressin, oxytocin analogs often bind with much lower affinity to vasopressin receptors V1, in the uterine lining, and V2, in the kidneys[REF] and may consequently interact with or disrupt the vasopressin circuitry and feedback loops.
Carbetocin may work synergistically with drugs such as Dinoprostone and Misoprostol that ripen the cervix.