Sublingual misoprostol for labor induction: a randomized clinical trial

Area of Science:

• Obstetrics and Gynecology
• Reproductive Medicine
• Clinical Pharmacology

Background:

• Labor induction is a common obstetric procedure.
• Cervical ripening is often necessary before labor induction.
• Misoprostol is a widely used agent for labor induction and cervical ripening.

Purpose of the Study:

• To compare the effectiveness of 50 mcg versus 100 mcg of repetitive sublingual misoprostol for labor induction.
• To evaluate the impact of different misoprostol dosages on the interval to vaginal delivery and adverse events.

Main Methods:

• A double-blind, randomized controlled trial involving 212 women requiring cervical ripening and labor induction.
• Participants were assigned to receive either 50 mcg or 100 mcg of sublingual misoprostol.
• The primary outcome measured was the time from induction initiation to vaginal delivery.

Main Results:

• The 100 mcg group showed a significantly higher proportion of vaginal deliveries within 12 and 24 hours (28% vs 15% and 63% vs 36%, respectively).
• The 100 mcg group experienced a significantly higher incidence of tachysystole (P = .02).
• Fewer women in the 100 mcg group required oxytocin augmentation (61% vs 81%, P = .002).

Conclusions:

• 100 mcg of sublingual misoprostol is more effective for labor induction than 50 mcg.
• The higher dosage is associated with an increased risk of tachysystole and uterine hyperstimulation syndrome.
• No significant differences were observed in the mode of delivery or perinatal outcomes.