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Atrial FibrillationHeart and circulationDrugPhase 3

What this study is

This is a multi-national, multi-center, randomized, double-blind, placebo-controlled study to evaluate the effects of etripamil NS in patients with atrial fibrillation (AF). This study includes Screening Visit, Randomization Visit, a Treatment Period with scheduled Follow-up Visits (Monthly Follow-up and Post-treatment Follow-up Visits), a Final Study Visit, and an End of Study Telephone Follow up Visit.

Each patient will be randomized 1:1 to receive placebo or 70 mg Etripamil NS regimens. Patients will self-administer study drug for a perceived episode of AF with RVR with an initial dose of placebo or 70 mg etripamil NS, followed by an optional second dose of the same study drug 10 minutes after the first dose if the patient continues to experience symptoms. Patients may treat up to a maximum of 4 episodes in the study.

Informed consent will be obtained prior to any study procedures.

What's being tested

  • Placebo

    Intervention · DRUG

    The formulation of placebo will consist of water, sodium acetate, disodium EDTA, and sulfuric acid to reproduce the same pH as the etripamil formulation.

  • Etripamil

    Intervention · DRUG

    The formulation of etripamil is for IN administration and will consist of etripamil, water, acetic acid, disodium ethylene-diamine-tetra-acetic acid (EDTA), and sulfuric acid. The dose of etripamil to be evaluated in this study is 70 mg with an optional second dose of 70 mg 10 minutes after the first dose if symptoms persist.

Study details

Official title
Multi-Center, Placebo-Controlled, Phase 3 Study of Etripamil Nasal Spray (NS) in Patients With Atrial Fibrillation and Rapid Ventricular Rate (RVR)
Sponsor
Milestone Pharmaceuticals Inc.
Conditions
Atrial Fibrillation
Enrolling
750 people
Starts
2026-08-20
Est. completion
2029-12
Design
Quadruple-blind, randomized, parallel groups, Phase 3
Record
View on ClinicalTrials.gov ↗