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A Phase 3, 52-Week, Randomized, Double-Blind, Placebo-Controlled, Parallel-Arm Efficacy and Safety Study with Open-Label Extension of BLU-5937 in Adult Participants with Refractory Chronic Cough, Including Unexplained Chronic Cough (CALM-1)

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-513460-26-00
Acronym
BUS-P3-01
Enrollment
275
Registered
2024-09-24
Start date
2023-03-29
Completion date
Unknown
Last updated
2025-12-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Refractory Chronic Cough, Including Unexplained Chronic Cough

Brief summary

24-hour cough frequency at Week 12 by a cough monitor. • Incidence of AEs and SAEs up to Week 52 • Incidence of AEMIs up to Week 52 • Occurrences of study treatment discontinuations due to AEs and SAEs up to Week 52 • Occurrences of AEs and SAEs leading to study withdrawal up to Week 52

Detailed description

CS-VAS • Change from Baseline in CS-VAS at Week 12 • CS-VAS response at Week 12 Objective cough frequency recording • Awake cough frequency at Week 12 • 24-hour cough response at Week 12 LCQ • Change from Baseline in the LCQ total score at Week 12 • LCQ response at Week 12

Interventions

DRUGTablets are round

Sponsors

Bellus Health Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
24-hour cough frequency at Week 12 by a cough monitor. • Incidence of AEs and SAEs up to Week 52 • Incidence of AEMIs up to Week 52 • Occurrences of study treatment discontinuations due to AEs and SAEs up to Week 52 • Occurrences of AEs and SAEs leading to study withdrawal up to Week 52

Secondary

MeasureTime frame
CS-VAS • Change from Baseline in CS-VAS at Week 12 • CS-VAS response at Week 12 Objective cough frequency recording • Awake cough frequency at Week 12 • 24-hour cough response at Week 12 LCQ • Change from Baseline in the LCQ total score at Week 12 • LCQ response at Week 12

Countries

Belgium, France, Hungary, Netherlands, Poland, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026