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Clinical Trial Summary

The primary objective of this study is to compare the efficacy and safety of vaginal and buccal misoprostol for women undergoing labor induction at greater than or equal to 37+ 0 completed weeks gestation. Thus, the investigators have both efficacy and a safety primary outcomes. The secondary objective of this study is to assess the pharmacokinetic(PK) parameters with these two routes of administration in a sub-cohort of this trial. The long term objective of this line of research is to inform providers' clinical decision making for the large number of women having labor induction. By providing robust PK and pharmacodynamic (PD) evaluation, clinical outcomes data for these two routes of administration, clinicians will be informed for evidence-based decisions about the preferred route of administration of misoprostol.


Clinical Trial Description

Misoprostol is currently administered in many different ways. It can be administered vaginally, rectally, orally, buccally, and sublingually. Each route has its benefits and potential drawbacks. While vaginal administration is most common, recent trends in practice have yielded more buccal use of this drug. There is extensive clinical experience with this agent and a large body of published reports supporting its safety and efficacy when used appropriately. However, we only found one published trial directly comparing buccal to vaginal misoprostol head-to-head. In that trial, there were no significant differences in any of the outcomes other than higher rates of tachysystole in the buccal group. However, this trial utilized higher doses of misoprostol (up to 100mcg) than are typically used clinically per the ACOG Practice Bulletin (starting at 25 mcg). Additionally, there are few comparisons of the pharmacokinetics of misoprostol between the buccal and vaginal routes. In fact, all of the PK studies comparing these routes are in women undergoing pregnancy terminations in the 1st or 2nd trimesters and do not include women undergoing labor induction at term. As the physiological changes in pregnancy have a profound impact on drug metabolism and disposition, this is an important gap in the current knowledge. The 3 Specific Aims of this trial are: 1. To compare the efficacy and safety of 25 mcg of misoprostol initially followed by 50mcg thereafter administered by either buccal or vaginal route in a placebo-controlled, double blind RCT. We will recruit women at term undergoing labor induction to accomplish this trial. 2. To compare the PK parameters of 25 mcg and 50 mcg of misoprostol administered by either buccal or vaginal routes. Further, we will analyze the clinical outcomes in Aim 1 based on the PK parameters, controlling for patient characteristics, to assess the impact of PK parameters on clinical success of this drug. In this way, we hope to comment on the strategic dose and individualized dosing model potential for labor induction with misoprostol. 3. To compare the trial participant satisfaction with each route of administration to improve patient-based outcomes. This will be done by administering a satisfaction survey at the end of the trial. As participants will have study drug placed both buccally and vaginally, they will be uniquely able to comment on comfort and preference for route of delivery. We will recruit women who are admitted for term labor induction and for whom the provider plans to utilize misoprostol. Women will be randomized to receive either buccal or vaginal misoprostol; first dose will be 25 mcg followed by 50mcg for subsequent doses. Three hundred women will be recruited to the overall trial and a subcohort of 60 women will be recruited to participate in the PK portion of the trial. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT02408315
Study type Interventional
Source Indiana University
Contact
Status Completed
Phase Phase 3
Start date September 2015
Completion date December 2021

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