Phathom Pharmaceuticals Announces Initiation of Registrational Phase 3 Study of VOQUEZNA® (vonoprazan) for As-Needed Treatment of Non-Erosive GERD

* Initiation of registrational Phase 3 study of VOQUEZNA® (vonoprazan) for as-needed (PRN) use in Non-Erosive Reflux Disease (NERD) builds on previously reported positive Phase 2 data

* pHalcon-NERD-302, if successful, is intended to support a potential VOQUEZNA label expansion to include as-needed treatment of heartburn episodes in patients with Non-Erosive GERD, a treatment regimen of interest to patients for which proton pump inhibitors (PPIs) are not currently approved in the U.S. FLORHAM PARK, N.J., Sept. 29, 2026 (GLOBE NEWSWIRE) -- Phathom Pharmaceuticals, Inc. (Nasdaq: PHAT), a biopharmaceutical company focused on the development and commercialization of novel treatments for gastrointestinal diseases, today announced the initiation of patient screening in pHalcon-NERD-302, a registrational Phase 3 study evaluating an as-needed (PRN or on-demand) investigational dosing regimen of VOQUEZNA® (vonoprazan) tablets in adults with Non-Erosive Gastroesophageal Reflux Disease, or Non-Erosive GERD (NERD). Topline results are expected in the first quarter of 2028. If successful, the study is intended to support a potential regulatory submission seeking a label expansion for VOQUEZNA tablets for this treatment regimen.