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A Phase 3, 24-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-2)

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-513462-19-00
Acronym
BUS-P3-02
Enrollment
257
Registered
2024-08-08
Start date
2023-03-30
Completion date
Unknown
Last updated
2025-11-12

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 24 by a cough monitor in adult participants • Incidence of AEs and SAEs up to Week 24 • Incidence of AEMIs up to Week 24 • Incidence of study treatment discontinuations due to AEs and SAEs leading to study withdrawal up to Week 24 • Changes from Baseline in vital signs at Week 24, clinical laboratory values at Week 24 • Changes from Baseline in ECG values at Week 24

Detailed description

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

Interventions

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 24 by a cough monitor in adult participants • Incidence of AEs and SAEs up to Week 24 • Incidence of AEMIs up to Week 24 • Incidence of study treatment discontinuations due to AEs and SAEs leading to study withdrawal up to Week 24 • Changes from Baseline in vital signs at Week 24, clinical laboratory values at Week 24 • Changes from Baseline in ECG values at Week 24

Secondary

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

Countries

Czechia, Germany, Poland, Slovakia

Outcome results

None listed

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