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A Phase 3 Study Evaluating the Pharmacokinetics, Safety, and Tolerability of VX 121/Tezacaftor/Deutivacaftor Triple Combination Therapy in Cystic Fibrosis Subjects 1 Through 11 Years of Age (VX21-121-105)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-513754-29-00
Acronym
VX21-121-105
Enrollment
15
Registered
2024-09-20
Start date
2023-03-06
Completion date
Unknown
Last updated
2025-12-17

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

Conditions

Cystic Fibrosis

Brief summary

Part A: PK parameters of VX-121, TEZ, D-IVA, and relevant metabolites, Part A: Safety and tolerability as determined by adverse events (AEs), clinical laboratory values, standard 12 lead ECGs, vital signs, and pulse oximetry, Part B: Safety and tolerability as determined by AEs, clinical laboratory values, standard 12-lead ECGs, vital signs, and pulse oximetry

Detailed description

Part B (ID 1-11): Absolute change in SwCl from baseline through Week 24, PK parameters of VX 121, TEZ, D-IVA, and relevant metabolites, Drug acceptability assessment using Modified Facial Hedonic Scale, Absolute change in ppFEV1 from baseline through Week 24, Number of PEx and CF-related hospitalizations through Week 24, Absolute change in CFQ-R RD score from baseline through Week 24, Absolute change in BMI and BMI-for-age z-score from baseline at Week 24, Absolute change in weight and weight-for-age z-score from baseline at Week 24, Absolute change in height and height-for-age z-score from baseline at Week 24, Proportion of subjects with SwCl <60 mmol/L through Week 24, Proportion of subjects with SwCl <30 mmol/L through Week 24

Interventions

Sponsors

Vertex Pharmaceuticals Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
0 Years to 17 Years

Design outcomes

Primary

MeasureTime frame
Part A: PK parameters of VX-121, TEZ, D-IVA, and relevant metabolites, Part A: Safety and tolerability as determined by adverse events (AEs), clinical laboratory values, standard 12 lead ECGs, vital signs, and pulse oximetry, Part B: Safety and tolerability as determined by AEs, clinical laboratory values, standard 12-lead ECGs, vital signs, and pulse oximetry

Secondary

MeasureTime frame
Part B (ID 1-11): Absolute change in SwCl from baseline through Week 24, PK parameters of VX 121, TEZ, D-IVA, and relevant metabolites, Drug acceptability assessment using Modified Facial Hedonic Scale, Absolute change in ppFEV1 from baseline through Week 24, Number of PEx and CF-related hospitalizations through Week 24, Absolute change in CFQ-R RD score from baseline through Week 24, Absolute change in BMI and BMI-for-age z-score from baseline at Week 24, Absolute change in weight and weight-for-age z-score from baseline at Week 24, Absolute change in height and height-for-age z-score from baseline at Week 24, Proportion of subjects with SwCl <60 mmol/L through Week 24, Proportion of subjects with SwCl <30 mmol/L through Week 24

Countries

France, Germany, Netherlands, Sweden

Outcome results

None listed

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