NCT06377098

Intrapartum Sildenafil in Laboring Mothers

Sildenafil Citrate to Improve Maternal and Neonatal Outcomes in Low-Resource Settings: A Randomized Pilot Feasibility Trial: Pilot Randomized Intrapartum Sildenafil in Mothers

• Status: Withdrawn
• Phase: Phase 3
• Study type: Interventional
• Enrollment: 0 (actual)
• Sponsor: University of Alabama at Birmingham · Academic / Other
• Sex: All
• Age: 0 Days – 40 Years
• Healthy volunteers: Not accepted

Summary

The goal of this feasibility pilot clinical trial is to learn if sildenafil citrate 50mg orally, up to three times during labor, can be appropriately administered, with limited clinical side effects, to laboring mothers to determine feasibility across a spectrum of available healthcare resources. The main questions it aims to answer are: * What are the fetal heart rate monitoring practices in a low-resource setting? * What are the indications for operative delivery in a low-resource? * What is the rate of relevant primary and secondary outcomes to possibly target in a large RCT of intrapartum sildenafil? * What is the limited effect size of sildenafil citrate on maternal and neonatal outcomes in a low-resource setting? Researchers will compare the administration of sildenafil citrate 50 mg orally to a placebo (a look-alike substance that contains no drug) to see if procedures are feasible, the drug is tolerated, the target outcomes are achievable, and effect size is as expected. Participants will: * Take Sildenafil 50 mg/placebo every eight hours or a placebo every eight hours for up to 24 hours during labor * Have the (mothers \& babies) medical charts reviewed for outcomes, including fetal distress, operative delivery, maternal side effects, neonatal bag \& mask ventilation, Apgar scores, and seizures. * Have a neonatal neurological assessment prior to discharge * Have phone call assessments for re-hospitalization or mortality 7 days post-delivery * Receive child development assessments at 1 year, 2 years and 3 years of age by the Ages and Stages Questionnaire administered via a telephone call The results of this feasibility pilot trial will be used to inform the design and conduct of a large pragmatic randomized controlled trial to determine if sildenafil citrate, compared to placebo, will decrease fetal distress and perinatal asphyxia.

Detailed description

After informed consent obtained, mother will be randomized, using computer-generated stratified randomization codes by the pharmacy. Clinicians, researcher, and primary caregivers will be masked. Subjects will be randomly assigned to either the treatment arm or the placebo concurrent control. Eligible women who consent for the study will be randomized to receive sildenafil 50 mg orally every 8 hours up to a total of 3 doses or to receive the placebo every 8 hours up to a total of 3 does during the course of labor. Neither medication no placebo will be given following completion of labor. All additional care of the mother and infant will be provided according to the local standard of care. Outcomes will be collected following delivery, discharge, and 7-days post-partum. 7-day follow-up for outcomes will be obtained per a telephone call. One, two, and three year infant developmental and behavior outcome will be assessed using the Ages and Stages Questionnaire.

Conditions

• Neonatal Asphyxia
• Intrapartum Fetal Distress
• Development, Infant
• Intrapartum Asphyxia

Interventions

Type	Name	Description
DRUG	Sildenafil 50 mg Oral Tablet	Sildenafil 50 mg given orally every eight hours up to three times while mother is in labor
DRUG	Placebo Oral Tablet	Placebo table given orally every eight hours up to three times while mother is in labor

Timeline

• Start date: 2025-05-01
• Primary completion: 2026-08-31
• Completion: 2028-09-30
• First posted: 2024-04-22
• Last updated: 2025-09-16

Locations

3 sites across 3 countries: Cameroon, Kenya, Zambia