Original Investigation

Proton Pump Inhibitor Use and Survival in Patients With Newly Diagnosed Glioblastoma

JAMA Network Open 10.1001/jamanetworkopen.2025.45578

November 25, 2025 at 11:00 AM EST

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Is exposure of patients with newly diagnosed glioblastoma to proton pump inhibitors associated with survival outcomes?This meta-analysis of individual data from 2981 patients enrolled into 5 prospective clinical trials found that the use of proton pump inhibitors that are potent activators of aldehyde dehydrogenase 1 A1 was associated with inferior survival outcomes, independently of promoter methylation status and steroid use. No such association was observed with other antacid medications.These findings suggest that PA-PPI use should be discouraged in patients with glioblastoma.

Corresponding Author: Emilie Le Rhun, MD, PhD, Department of Medical Oncology and Hematology, University Hospital and University of Zurich, Rämistrasse 100, CH-8091 Zürich, Switzerland (emilie.lerhun@usz.ch).

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