The problem with Cytotec is that if it overstimulates the uterus, they can't remove it. Cervidil is designed for cervical ripening and can be removed if they need to. This can lead to other interventions, including c-section. This is nasty stuff that should NOT be used in labor. If you have to induce, make them use Cervidil.
From the labeling information for Cytotec (from the FDA's website):
http://www.fda.gov/Cder/foi/label/2002/19268slr037.pdf
Labor and Delivery:
Cytotec can induce or augment uterine contractions. ******l administration of Cytotec, outside of its
approved indication, has been used as a cervical ripening agent, for the induction of labor and for
treatment of serious postpartum hemorrhage in the presence of uterine atony. A major adverse effect of
the obstetrical use of Cytotec is hyperstimulation of the uterus which may progress to uterine tetany with
marked impairment of uteroplacental blood flow, uterine rupture (requiring surgical repair, hysterectomy,
and/or salpingo-oophorectomy), or amniotic fluid embolism. Pelvic pain, retained placenta, severe
genital bleeding, shock, fetal bradycardia, and fetal and maternal death have been reported.
There may be an increased risk of uterine tachysystole, uterine rupture, meconium passage, meconium
staining of amniotic fluid, and Cesarean delivery due to uterine hyperstimulation with the use of higher
doses of Cytotec; including the manufactured 100 mcg tablet. The risk of uterine rupture increases with
advancing gestational ages and with prior uterine surgery, including Cesarean delivery. Grand multiparity
also appears to be a risk factor for uterine rupture.
The effect of Cytotec on the later growth, development, and functional maturation of the child when
Cytotec is used for cervical ripening or induction of labor have not been established. Information on
Cytotecs effect on the need for forceps delivery or other intervention is unknown.