Clinical trial Recruiting at 1 site Observational Ages 15 to 50 Women only

Examining the safety of vonoprazan in pregnant women and their babies

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

Run by Phathom Pharmaceuticals, Inc. · NCT06660342 · Data updated 2026-11-12

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.

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Quick facts

Study typeObservational
Ages15 Years to 50 Years
SexWomen only
Enrollment728 (estimated)
SponsorPhathom Pharmaceuticals, Inc.
Industry-sponsored
Locations1 site (Wilmington, North Carolina)
StatusRecruiting
StartedMay 15, 2025
Main results expectedSeptember 2034
Study endsSeptember 2034
Registry record updatedSeptember 18, 2026
Trial IDNCT06660342 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a 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.

Probably 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.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

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.

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 gone: 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.

Who can join: the full rules

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 it's running

  • Ppd
    Wilmington, North Carolina, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.