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Completed Phase 3 Interventional Results available

A Phase 3 Study of VX-445 Combination Therapy in Cystic Fibrosis (CF) Subjects Heterozygous for F508del and a Gating or Residual Function Mutation (F/G and F/RF Genotypes)

ClinicalTrials.gov ID: NCT04058353

Public ClinicalTrials.gov record NCT04058353. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Oct 17, 2026, 12:15 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Phase 3, Randomized, Double-blind, Controlled Study Evaluating the Efficacy and Safety of VX-445 Combination Therapy in Subjects With Cystic Fibrosis Who Are Heterozygous for the F508del Mutation and a Gating or Residual Function Mutation (F/G and F/RF Genotypes)

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

This study will evaluate the efficacy, safety and pharmacodynamics of elexacaftor (ELX, VX-445) in triple combination (TC) with tezacaftor (TEZ) and ivacaftor (IVA) in subjects with cystic fibrosis (CF) who are heterozygous for F508del and a gating or residual function mutation (F/G and F/RF genotypes).

Study identification

NCT ID
NCT04058353
Recruitment status
Completed
Study type
Interventional
Phase
Phase 3
Enrollment
271 participants

Conditions and interventions

Interventions

Drug

Eligibility (public fields only)

Age range
12 Years and older
Sex
All
Healthy volunteers
Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Aug 28, 2019 (Actual)
Primary completion
Jun 12, 2020 (Actual)
Completion
Jun 12, 2020 (Actual)
Last update posted
Jul 2, 2021

2019 – 2020

United States locations

U.S. sites
37
U.S. states
24
U.S. cities
35
Facility City State ZIP Site status
University of Alabama at Birmingham Birmingham Alabama 35233 —
Banner University of Arizona Medical Center Tucson Arizona 85724 —
Miller Children's Hospital / Long Beach Memorial Long Beach California 90806 —
Stanford University Palo Alto California 94304 —
University of California Davis Medical Center Sacramento California 95817 —
University of California San Francisco, Lung Transplant Program San Francisco California 94143 —
National Jewish Health Denver Colorado 80206 —
University of Miami Miller School of Medicine Miami Florida 33136 —
Central Florida Pulmonary Group, PA Orlando Florida 32803 —
Indiana University Indianapolis Indiana 46202 —
The University of Iowa Hospitals and Clinics Iowa City Iowa 52242 —
University of Kansas Medical Center Kansas City Kansas 66160 —
University of Kentucky Lexington Kentucky 40536 —
Massachusetts General Hospital Cystic Fibrosis Center Clinical Rsearch Center Boston Massachusetts 02114 —
Boston Children's Hospital Boston Massachusetts 02115 —
Michigan Medicine Ann Arbor Michigan 48109-5212 —
University of Minnesota Minneapolis Minnesota 55455 —
Washington University School of Medicine / St. Louis Children's Hospital St Louis Missouri 63110 —
Dartmouth Hitchcock Medical Center Lebanon New Hampshire 03756 —
Northwell Health- Long Island Jewish Medical Center New Hyde Park New York 11040 —
Mount Sinai Beth Israel New York New York 10003 —
Columbia University Medical Center New York New York 10032 —
University of North Carolina Hospitals Chapel Hill North Carolina 27514 —
UC Health Holmes Cincinnati Ohio 45220 —
Rainbow Babies and Children's Hospital/University Hospitals Cleveland Medical Center Cleveland Ohio 44106 —
Nationwide Children's Hospital Columbus Ohio 43205 —
ProMedica Toledo Hospital/Toledo Children's Hospital/Pediatric Pulmonary & Cystic Fibrosis Center Toledo Ohio 43606 —
University of Oklahoma Health Sciences Center Oklahoma City Oklahoma 73104 —
Oregon Health & Science University Portland Oregon 97239 —
Children's Hospital of Philadelphia Philadelphia Pennsylvania 19104 —
Children's Hospital of Pittsburgh of UPMC Pittsburgh Pennsylvania 15224 —
Dell Children's Medical Group Austin Texas 78723 —
The University of Texas Southwestern Medical Center Dallas Texas 75390 —
Texas Children's Hospital Houston Texas 77030 —
University of Utah / Primary Children's Medical Center Salt Lake City Utah 84132 —
University of Washington Medical Center Seattle Washington 98195 —
University of Wisconsin Hospital and Clinics Madison Wisconsin 53792 —

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 56 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT04058353, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Jul 2, 2021 · Synced Oct 17, 2026

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Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT04058353 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →