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Study details
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A Phase 1/2 Trial of VX-522 in People with Cystic Fibrosis

Vertex Pharmaceuticals Incorporated
NCT IDNCT05668741ClinicalTrials.gov data as of Apr 2026
Phase

Phase 1/2

Target enrollment

39

Study length

about 4.2 years

Ages

18–65

Locations

24 sites in AL, CA, CO +15

What this study is about

Researchers are testing the safety and how well a treatment called VX-522 works in people with cystic fibrosis who haven't responded to other treatments. The trial will last for about 1535 days.

Simplified from trial records by PatientMatch.

What you may be asked to do

  • 1.Take IVA
  • 2.Take VX-522 mRNA therapy

Participation Burden

What's physically and logistically required of participants.

Logistics & Travel
In-person visits

Requires travel to a study site

Physical Intervention
Standard

How treatment is administered

Treatment Assignment
Standard assignment

Assignment is predetermined by the study protocol.

Extracted study details

Pulled from the trial record to show what is being tested and what the study is measuring.

Endpoints

Primary: Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)

Secondary: MAD: Change From Baseline in Percent Predicted Forced Expiratory Volume in 1 Second (ppFEV1), MAD: Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)

Body systems

Respiratory