ClinicalTrials.gov record
A Study to Evaluate the Efficacy and Safety of Vonoprazan Compared to Placebo in Participants With Symptomatic Non-Erosive Gastroesophageal Reflux Disease
ClinicalTrials.gov ID: NCT04799158
Public ClinicalTrials.gov record NCT04799158. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
ClinicalTrials.gov public records Last synced May 19, 2026, 11:57 PM EDT
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Phase 2, Randomized, Double-Blind, Multicenter Study to Evaluate the Efficacy and Safety of Vonoprazan 10 mg, 20 mg, and 40 mg Compared to Placebo for Relief of Episodic Heartburn in Subjects With Symptomatic Non-Erosive Gastroesophageal Reflux Disease
Study identification
- NCT ID
- NCT04799158
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 2
- Lead sponsor
- Phathom Pharmaceuticals, Inc.
- Industry
- Enrollment
- 458 participants
Conditions and interventions
Interventions
- Placebo Drug
- Vonoprazan Drug
Drug
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Mar 24, 2021
- Primary completion
- Dec 15, 2021
- Completion
- Jan 16, 2022
- Last update posted
- Jan 3, 2023
2021 – 2022
United States locations
- U.S. sites
- 63
- U.S. states
- 26
- U.S. cities
- 58
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Pinnacle Research Group | Anniston | Alabama | 36207 | — |
| North Alabama Research Center LLC | Athens | Alabama | 35611-2456 | — |
| Medical Affiliated Research Center Inc | Huntsville | Alabama | 35801 | — |
| Elite Clinical Studies, LLC | Phoenix | Arizona | 85018 | — |
| Del Sol Research Management - Clinedge | Tucson | Arizona | 85712-5637 | — |
| Preferred Research Partners - ClinEdge | Little Rock | Arkansas | 72211-3868 | — |
| Arkansas Gastroenterology | North Little Rock | Arkansas | 72117-2924 | — |
| GW Research, Inc | Chula Vista | California | 91910-3906 | — |
| eStudySite | Chula Vista | California | 91911-6660 | — |
| Paragon Rx Clinical | Garden Grove | California | 92840-3103 | — |
| OM Research LLC | Lancaster | California | 93534-5504 | — |
| Medical Associates Research Group, Inc. | San Diego | California | 92123-4207 | — |
| Paragon Rx Clinical, Inc. | Santa Ana | California | 92703-1811 | — |
| Western States Clinical Research Inc | Wheat Ridge | Colorado | 80033-6800 | — |
| Imagine Research of Palm Beach County | Boynton Beach | Florida | 33435-5610 | — |
| Riverside Clinical Research | Edgewater | Florida | 32132 | — |
| Nature Coast Clinical Research | Inverness | Florida | 34452-4717 | — |
| ENCORE Borland-Groover Clinical Research | Jacksonville | Florida | 32256-6004 | — |
| ClinCloud | Maitland | Florida | 32751-3320 | — |
| G. Medical Center | Orlando | Florida | 32807-4346 | — |
| Advanced Gastroenterology Associates, LLC | Palm Harbor | Florida | 34684 | — |
| Clinical Research Center of Florida | Pompano Beach | Florida | 33060-6934 | — |
| Precision Clinical Research, LLC | Sunrise | Florida | 33351-7311 | — |
| Guardian Angel Research Center | Tampa | Florida | 33614 | — |
| Florida Medical Clinic, LLC Clinical Research Division | Zephyrhills | Florida | 33542 | — |
| IACT Health | Columbus | Georgia | 31904-8946 | — |
| In Quest Medical Research | Suwanee | Georgia | 30024-9134 | — |
| Treasure Valley Medical Research | Boise | Idaho | 83706-1345 | — |
| Care Access | Chicago | Illinois | 60616 | — |
| Iowa Digestive Disease Center | Clive | Iowa | 50325-8151 | — |
| Clinical Trials Management LLC | Covington | Louisiana | 70433-4966 | — |
| Legacy Clinical Solutions: Tandem Clinical Research, LLC | Marrero | Louisiana | 70072-3156 | — |
| Clinical Trials Management LLC | Metairie | Louisiana | 70006-4165 | — |
| Investigative Clinical Research | Annapolis | Maryland | 21401-1091 | — |
| Gastroenterology Associates of Western Michigan, PLC | Wyoming | Michigan | 49519-9691 | — |
| GI Associates and Endoscopy Center | Flowood | Mississippi | 39232 | — |
| Quality Clinical Research | Omaha | Nebraska | 68114 | — |
| Sierra Clinical Research - ClinEdge | Las Vegas | Nevada | 89106-4159 | — |
| Site 2 | Las Vegas | Nevada | 89119 | — |
| Site 1 | Las Vegas | Nevada | 89128 | — |
| Advanced Research Institute | Reno | Nevada | 89511 | — |
| Drug Trials America | Hartsdale | New York | 10530-1837 | — |
| Javara Inc | Charlotte | North Carolina | 28287-3884 | — |
| Medication Management LLC | Greensboro | North Carolina | 27408-7099 | — |
| Carolina Research | Greenville | North Carolina | 27834-3761 | — |
| Peters Medical Research, LLC | High Point | North Carolina | 27262-4800 | — |
| Trial Management Associates LLC | Wilmington | North Carolina | 28403-7018 | — |
| Remington Davis Inc | Columbus | Ohio | 43215-7098 | — |
| Frontier Clinical Research, LLC | Uniontown | Pennsylvania | 15401-9069 | — |
| Coastal Carolina Research Center | North Charleston | South Carolina | 29405 | — |
| Rapid City Medical Center LLP | Rapid City | South Dakota | 57701-5462 | — |
| Clinical Research Associates Inc | Nashville | Tennessee | 37203-2066 | — |
| Inquest Clinical Research | Baytown | Texas | 77521-2416 | — |
| Family Medicine Associates of Texas | Carrollton | Texas | 75010 | — |
| Synergy Group US, LLC | Houston | Texas | 77036 | — |
| Biopharma Informatic, LLC | Houston | Texas | 77084 | — |
| Rio Grande Gastroenterology | McAllen | Texas | 78530 | — |
| Quality Research Inc | San Antonio | Texas | 78209-1744 | — |
| Gastroenterology Research of San Antonio (GERSA) | San Antonio | Texas | 78229-3270 | — |
| Sherman Clinical Research | Sherman | Texas | 75092 | — |
| Advanced Research Institute | Ogden | Utah | 84405 | — |
| Advanced Research Institute | Sandy City | Utah | 84092-4350 | — |
| Virginia Gastroenterology Institute | Suffolk | Virginia | 23435 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04799158, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jan 3, 2023 · Synced May 19, 2026
Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.
Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04799158 live on ClinicalTrials.gov.