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A Study Evaluating the Long-term Safety and Efficacy of VX-121 Combination Therapy

A Phase 3, Open-label Study Evaluating the Long-term Safety and Efficacy of VX-121/TEZ/D-IVA Combination Therapy in Subjects With Cystic Fibrosis

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05444257
Enrollment
822
Registered
2022-07-05
Start date
2022-11-08
Completion date
2026-10-30
Last updated
2026-09-10

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

Conditions

Cystic Fibrosis

Brief summary

The purpose of this study is to evaluate the long-term safety, tolerability, and efficacy of VX-121/tezacaftor/deutivacaftor (VX-121/TEZ/D-IVA) in participants with cystic fibrosis.

Interventions

Fixed-dose combination tablets for oral administration.

Sponsors

Vertex Pharmaceuticals Incorporated
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
12 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria: * Part A: Completed study drug treatment in a parent study VX20-121-102 (NCT05033080) and VX20-121-103 (NCT05076149); or had study drug interruption(s) in a parent study but did not permanently discontinue study drug, and completed study visits up to the last scheduled visit of the Treatment Period in the parent study * Part B: Completed study drug treatment in Part A; or had study drug interruption(s) in Part A, but did not permanently discontinue study drug, and completed study visits up to the last scheduled visit of the Treatment Period of Part A Key

Exclusion criteria

* History of drug intolerance in a parent study * Pregnant or breast-feeding females at the time of enrollment in Part A Other protocol defined Inclusion/

Design outcomes

Primary

MeasureTime frame
Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)From Baseline up to Week 148

Secondary

MeasureTime frame
Absolute Change From Baseline in Percent Predicted Forced Expiratory Volume in 1 Second (ppFEV1)From Baseline up to Week 144
Absolute Change From Baseline in Sweat Chloride (SwCl)From Baseline up to Week 144
Number of Pulmonary Exacerbations (PEx)From Baseline up to Week 144

Countries

Australia, Austria, Belgium, Canada, Czechia, Denmark, France, Germany, Greece, Hungary, Ireland, Israel, Italy, Netherlands, New Zealand, Norway, Poland, Portugal, Spain, Sweden, Switzerland, United Kingdom, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 11, 2026