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Showing 1–24 of 39 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 3 Interventional Results available

Evaluation of Long-term Safety and Efficacy of ELX/TEZ/IVA TC Combination Therapy in Participants With Cystic Fibrosis Who Are 6 Years of Age and Older

NCT04183790
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
ELX/TEZ/IVA, IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
6 Years and older
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
13
States / cities
Orange, California • Aurora, Colorado • Chicago, Illinois + 10 more
Source: ClinicalTrials.gov public record
Updated May 17, 2025 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 2 Interventional Results available

A Study Evaluating the Safety and Efficacy of VX-440 Combination Therapy in Subjects With Cystic Fibrosis

NCT02951182
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
TEZ, IVA, VX-440, Matched Placebo
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
22
States / cities
Tucson, Arizona • Palo Alto, California • San Francisco, California + 18 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2020 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Vanzacaftor/Tezacaftor/Deutivacaftor (VNZ/TEZ/D-IVA) on the PK of Rosuvastatin in Healthy Participants

NCT07349394
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VNZ/TEZ/D-IVA, Rosuvastatin
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years to 55 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 3 Interventional Results available

A Study of VX-445 Combination Therapy in CF Subjects Homozygous for F508del (F/F)

NCT03525548
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-445/TEZ/IVA, TEZ/IVA, IVA, Placebo
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
113 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
28
States / cities
Tucson, Arizona • Little Rock, Arkansas • Long Beach, California + 24 more
Source: ClinicalTrials.gov public record
Updated Jan 26, 2020 · Synced Sep 2, 2026, 3:57 PM EDT
Completed No phase listed Observational

A Decentralized Study to Evaluate Physical Activity and Cough Frequency Using Wearable Technology in Cystic Fibrosis

NCT04923464
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Not listed
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
11
States / cities
Denver, Colorado • New Haven, Connecticut • Orlando, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Jan 18, 2022 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 3 Interventional Results available

A Study of VX-121 Combination Therapy in Participants With Cystic Fibrosis (CF) Who Are Homozygous for F508del, Heterozygous for F508del and a Gating (F/G) or Residual Function (F/RF) Mutation, or Have At Least 1 Other Triple Combination Responsive (TCR) CFTR Mutation and No F508del Mutation

NCT05076149
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-121/TEZ/D-IVA, ELX/TEZ/IVA, IVA, Placebo (matched to VX-121/TEZ/D-IVA), Placebo (matched to ELX/TEZ/IVA), Placebo (matched to IVA)
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
597 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
62
States / cities
Birmingham, Alabama • Tucson, Arizona • Little Rock, Arkansas + 55 more
Source: ClinicalTrials.gov public record
Updated Jun 12, 2024 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 3 Interventional Results available

A Study of VX-659 Combination Therapy in CF Subjects Homozygous for F508del (F/F)

NCT03460990
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-659/TEZ/IVA, TEZ/IVA, IVA, Placebo
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
28
States / cities
Birmingham, Alabama • New Haven, Connecticut • Miami, Florida + 25 more
Source: ClinicalTrials.gov public record
Updated Oct 16, 2019 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate the Pharmacokinetics, Safety, and Tolerability of VX-661/Ivacaftor in Pediatric Subjects With Cystic Fibrosis (CF)

NCT02953314
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
TEZ, TEZ/IVA, IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
6 Years to 11 Years
Enrollment
83 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
30
States / cities
Birmingham, Alabama • Anchorage, Alaska • Little Rock, Arkansas + 27 more
Source: ClinicalTrials.gov public record
Updated Mar 3, 2020 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 2 Interventional Results available

A Study Evaluating the Safety and Efficacy of VX-659 Combination Therapy in Subjects With Cystic Fibrosis

NCT03224351
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-659, TEZ/IVA, IVA, Placebo (matched to VX-659/TEZ/IVA), TEZ, VX-561, Placebo (matched to VX-659/TEZ/VX-561)
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years and older
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
25
States / cities
New Haven, Connecticut • Miami, Florida • Morton Grove, Illinois + 22 more
Source: ClinicalTrials.gov public record
Updated Apr 21, 2021 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Evaluation of VX-828 in Healthy Participants and in Participants With Cystic Fibrosis

NCT06154447
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-828, Placebo, Itraconazole, Midazolam, Tezacaftor, VX-118, Deutivacaftor
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years and older
Enrollment
165 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
12
States / cities
Hollywood, Florida • Orlando, Florida • Overland Park, Kansas + 9 more
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 2, 2026, 3:57 PM EDT
Active, not recruiting Phase 3 Interventional

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

NCT05444257
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-121/TEZ/D-IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
822 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
72
States / cities
Birmingham, Alabama • Tucson, Arizona • Little Rock, Arkansas + 65 more
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 2 Interventional Results available

A Study Evaluating the Safety of VX-152 Combination Therapy in Adults With Cystic Fibrosis

NCT02951195
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-152, TEZ/IVA, IVA, Placebo
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
16
States / cities
Birmingham, Alabama • La Jolla, California • Los Angeles, California + 13 more
Source: ClinicalTrials.gov public record
Updated Jan 27, 2021 · Synced Sep 2, 2026, 3:57 PM EDT
Active, not recruiting Phase 3 Interventional

Evaluation of VX-121/Tezacaftor/Deutivacaftor in Cystic Fibrosis (CF) Participants 1 Through 11 Years of Age

NCT05422222
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-121/TEZ/D-IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
1 Year to 11 Years
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
19
States / cities
Orange, California • Palo Alto, California • Aurora, Colorado + 16 more
Source: ClinicalTrials.gov public record
Updated May 27, 2026 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Impact of Rifabutin on the Pharmacokinetics of Elexacaftor/Tezacaftor/Ivacaftor

NCT04840862
View directory record Official record
Conditions
Drug Drug Interaction
Interventions
Trikafta [orange tablet containing ELX 100mg, TEZ 50mg, and IVA 75mg], Rifabutin 300mg
Drug
Lead sponsor
University of Southern California
Other
Eligibility
18 Years to 65 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 8, 2024 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 3 Interventional Results available

Evaluation of VX 445/TEZ/IVA in Cystic Fibrosis Subjects 6 Through 11 Years of Age

NCT03691779
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
ELX/TEZ/IVA, IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
6 Years to 11 Years
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
13
States / cities
Orange, California • Aurora, Colorado • Chicago, Illinois + 10 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2021 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate the Safety and Efficacy of Long Term Treatment With VX-661 in Combination With Ivacaftor in Participants With Cystic Fibrosis Who Have an F508del-CFTR Mutation

NCT02565914
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
TEZ/IVA, IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
1,131 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
69
States / cities
Birmingham, Alabama • Tucson, Arizona • Little Rock, Arkansas + 66 more
Source: ClinicalTrials.gov public record
Updated Sep 27, 2023 · Synced Sep 2, 2026, 3:57 PM EDT
Completed No phase listed Observational Results available

: TRANSITION: An Observational Study of Transition From Lumacaftor/Ivacaftor to Tezacaftor/Ivacaftor (Tez/Iva)

NCT03445793
View directory record Official record
Conditions
Cystic Fibrosis (CF)
Interventions
Not listed
Lead sponsor
National Jewish Health
Other
Eligibility
12 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 22, 2024 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 3 Interventional Results available

A Phase 3 Study of VX-445 Combination Therapy in Subjects With Cystic Fibrosis Heterozygous for the F508del Mutation and a Minimal Function Mutation (F/MF)

NCT03525444
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-445/TEZ/IVA, IVA, Placebo
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
405 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
53
States / cities
Tucson, Arizona • Little Rock, Arkansas • Long Beach, California + 48 more
Source: ClinicalTrials.gov public record
Updated May 18, 2020 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 3 Interventional Results available

Study Evaluating the Long-term Safety and Efficacy of VX-445 Combination Therapy

NCT04058366
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
ELX/TEZ/IVA, IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
251 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
33
States / cities
Tucson, Arizona • Long Beach, California • Palo Alto, California + 28 more
Source: ClinicalTrials.gov public record
Updated Jan 15, 2024 · Synced Sep 2, 2026, 3:57 PM EDT
Terminated Phase 3 Interventional Results available

Evaluation of VX-659/TEZ/IVA in Cystic Fibrosis Subjects 6 Through 11 Years of Age

NCT03633526
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-659/TEZ/IVA, IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
6 Years to 11 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
6
States / cities
Aurora, Colorado • Chicago, Illinois • Kansas City, Missouri + 3 more
Source: ClinicalTrials.gov public record
Updated Feb 4, 2020 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 3 Interventional Results available

A Study Evaluating the Long-term Safety and Efficacy of VX-445 Combination Therapy

NCT03525574
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
ELX/TEZ/IVA, IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
507 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
52
States / cities
Tucson, Arizona • Little Rock, Arkansas • Long Beach, California + 47 more
Source: ClinicalTrials.gov public record
Updated Sep 23, 2025 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 2 Interventional Results available

A Study to Evaluate the Safety and Efficacy of VX-121 Combination Therapy in Subjects With Cystic Fibrosis

NCT03912233
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-121, TEZ, VX-561, TEZ/IVA, IVA, Placebo
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years and older
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
12
States / cities
Los Angeles, California • Oakland, California • Lexington, Kentucky + 9 more
Source: ClinicalTrials.gov public record
Updated Apr 19, 2023 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 3 Interventional Results available

Evaluation of ELX/TEZ/IVA in Cystic Fibrosis (CF) Subjects 2 Through 5 Years

NCT04537793
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
ELX/TEZ/IVA, IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
2 Years to 5 Years
Enrollment
83 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
13
States / cities
Tucson, Arizona • Palo Alto, California • Aurora, Colorado + 10 more
Source: ClinicalTrials.gov public record
Updated Jun 27, 2023 · Synced Sep 2, 2026, 3:57 PM EDT
Completed Phase 2 Interventional Results available

A Phase 2 Study to Evaluate Effects of VX-661/Ivacaftor on Lung and Extrapulmonary Systems in Subjects With Cystic Fibrosis, Homozygous for the F508del-CFTR Mutation

NCT02508207
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Tezacaftor/Ivacaftor, Ivacaftor, Tezacaftor/Ivacaftor matching placebo, Ivacaftor matching placebo
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
7
States / cities
Birmingham, Alabama • Indianapolis, Indiana • Baltimore, Maryland + 4 more
Source: ClinicalTrials.gov public record
Updated Jul 18, 2021 · Synced Sep 2, 2026, 3:57 PM EDT