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RECRUITING
NCT07626411
PHASE3

Stroke and Systemic Embolism Prevention in Adult Participants With Atrial Fibrillation

Sponsor: Regeneron Pharmaceuticals

View on ClinicalTrials.gov

Summary

This study is researching an experimental drug called REGN7508 (called "study drug") and how it compares against another treatment called apixaban. The study is focused on people who have atrial fibrillation, which means that the heart beats too fast and unevenly. The aim of the study is to see how safe and effective REGN7508 is in preventing stroke and/or systemic embolism in participants with atrial fibrillation and how it compares against participants that will receive apixaban in this study. The study is looking at several other research questions, including: * What side effects may happen from taking the study drug * Whether the body makes antibodies against the study drug (which could make the study drug less effective or could lead to side effects)

Official title: A Phase 3, Randomized, Multicenter, Double-blind Study to Assess Stroke and Systemic Embolism Prevention With REGN7508, a Monoclonal Antibody Against Factor XI, Versus Apixaban in Participants With Atrial Fibrillation (ROXI-EVEREST)

Key Details

Gender

All

Age Range

18 Years - Any

Study Type

INTERVENTIONAL

Enrollment

15364

Start Date

2026-08-10

Completion Date

2029-12-10

Last Updated

2026-08-25

Healthy Volunteers

No

Interventions

DRUG

REGN7508

Administered per the protocol

DRUG

Apixaban

Administered per the protocol

DRUG

Placebo

Administered per the protocol

Locations (8)

SEC Clinical Research

Dothan, Alabama, United States

Radin Cardiovascular Medical Group

Newport Beach, California, United States

Southern California Heart Specialists

Pasadena, California, United States

Sec Clinical Research

Pensacola, Florida, United States

Monroe Research, LLC

West Monroe, Louisiana, United States

PharmaTex Research

Amarillo, Texas, United States

West Houston Area Clinical Trial Consultants, LLC

Houston, Texas, United States

Permian Research Foundation

Odessa, Texas, United States