Examining the safety of vonoprazan in pregnant women and their babies

Vonoprazan Pregnancy Registry: An Observational Study of the Safety of Vonoprazan Exposure in Pregnant Women and Their Offspring

Observational Phathom Pharmaceuticals, Inc. · NCT06660342

This study is testing whether taking vonoprazan during pregnancy is safe for both mothers and their babies by comparing outcomes between those who took the medication and those who didn’t.

Quick facts

Study typeObservational
Enrollment728 (estimated)
Ages15 Years to 50 Years
SexFemale
SponsorPhathom Pharmaceuticals, Inc. Industry-sponsored
Locations1 site (Wilmington, North Carolina)
Trial IDNCT06660342 on ClinicalTrials.gov

What this trial studies

This observational study aims to assess the safety of vonoprazan exposure in pregnant women by comparing maternal, fetal, and infant outcomes between those who have taken vonoprazan and those who have not. The study will include women aged 15 to 50 who are currently or recently pregnant, with one group having been exposed to vonoprazan and another serving as a comparison cohort. Data will be collected from healthcare providers to evaluate the effects of the medication on both mothers and their offspring.

Who should consider this trial

Good fit: Ideal candidates are pregnant women aged 15 to 50 who have either been exposed to vonoprazan or are part of a comparison group that has not been exposed.

Not a fit: Patients who have experienced pregnancy outcomes prior to the study's initial contact or those exposed to known teratogens may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide critical insights into the safety of vonoprazan for pregnant women and their children.

How similar studies have performed: While this study focuses on a specific medication in a unique population, similar observational studies have provided valuable safety data for other medications during pregnancy.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Women 15 to 50 years of age.
* Currently or recently pregnant.
* Consent to participate.
* Authorization for her health care provider(s) (HCP\[s\]) to provide data to the registry.
* Exposed cohort: Exposure to at least one dose of vonoprazan during pregnancy.
* Unexposed cohort: Unexposed to vonoprazan and diagnosis of any condition for which vonoprazan may be prescribed.

Exclusion Criteria:

* Occurrence of pregnancy outcome prior to first contact with the virtual research coordination center (VRCC) (retrospectively enrolled).
* Exposure to known tetratogens and/or investigational medications during pregnancy.
* Lost to follow-up.

Where this trial is running

Wilmington, North Carolina

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Erosive EsophagitisHeartburnSymptomatic Non-erosive Gastroesophageal Reflux DiseaseHelicobacter Pylori InfectionPregnant WomenFetalInfant
Last reviewed 2026-06-10 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.