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Showing 1–24 of 61 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Tezacaftor Clear all
Recruiting Phase 4 Interventional

Ensuring Access to Optimal Therapy in CF: The ENACT Study

NCT07148739
View directory record Official record
Conditions
Cystic Fibrosis (CF)
Interventions
Elexacaftor / Ivacaftor / Tezacaftor, therapeutic drug monitoring
Drug · Other
Lead sponsor
Arkansas Children's Hospital Research Institute
Other
Eligibility
3 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
3
States / cities
Birmingham, Alabama • Little Rock, Arkansas • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 2 Interventional Results available

Trikafta in Cystic Fibrosis Patients

NCT03506061
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Trikafta
Drug
Lead sponsor
Emory University
Other
Eligibility
12 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
2
States / cities
Birmingham, Alabama • Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Sep 2, 2026, 7:19 AM EDT
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)

NCT04058353
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
ELX/TEZ/IVA, IVA, TEZ/IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
271 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
37
States / cities
Birmingham, Alabama • Tucson, Arizona • Long Beach, California + 32 more
Source: ClinicalTrials.gov public record
Updated Jul 1, 2021 · Synced Sep 2, 2026, 7:19 AM 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, 7:19 AM 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, 7:19 AM EDT
Completed Phase 3 Interventional Results available

A Phase 3 Study of VX-659 Combination Therapy in Subjects With Cystic Fibrosis Heterozygous for the F508del Mutation and a Minimal Function Mutation (F/MF)

NCT03447249
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-659/TEZ/IVA, IVA, Placebo
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
385 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
48
States / cities
Birmingham, Alabama • Palo Alto, California • Aurora, Colorado + 44 more
Source: ClinicalTrials.gov public record
Updated Mar 12, 2020 · Synced Sep 2, 2026, 7:19 AM EDT
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, 7:19 AM 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, 7:19 AM 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, 7:19 AM EDT
Recruiting No phase listed Observational

Sinus Disease in Young Children With Cystic Fibrosis

NCT06191640
View directory record Official record
Conditions
Cystic Fibrosis in Children, Cystic Fibrosis, Chronic Rhinosinusitis (Diagnosis), Olfactory Disorder, Olfactory Impairment
Interventions
Ivacaftor or elexacaftor/tezacaftor/ivacaftor
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
2 Years to 8 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
6
States / cities
Aurora, Colorado • Iowa City, Iowa • Kansas City, Kansas + 3 more
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

A Study of VX-445 in Healthy Subjects and Subjects With Cystic Fibrosis

NCT03227471
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
IVA, TEZ/IVA, VX-445, Matched Placebo, TEZ, VX-561
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years and older
Enrollment
225 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
26
States / cities
Tucson, Arizona • Little Rock, Arkansas • Madera, California + 23 more
Source: ClinicalTrials.gov public record
Updated Jan 17, 2022 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate the Efficacy and Safety of VX-661 in Combination With Ivacaftor in Subjects Aged 12 Years and Older With Cystic Fibrosis, Heterozygous for the F508del-CFTR Mutation

NCT02516410
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-661 plus ivacaftor combination, Ivacaftor, Placebo (matched to VX-661 plus ivacaftor combination), Placebo (matched to ivacaftor)
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
168 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
22
States / cities
Birmingham, Alabama • La Jolla, California • Los Angeles, California + 19 more
Source: ClinicalTrials.gov public record
Updated Jun 11, 2018 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 2 Interventional Results available

Study to Evaluate Safety and Efficacy of VX-661 in Combination With Ivacaftor in Subjects With Cystic Fibrosis, Homozygous for the F508del-CFTR Mutation With an Open-Label Expansion

NCT02070744
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-661, Ivacaftor, Placebo matched to VX-661, Placebo matched to Ivacaftor
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
23
States / cities
Birmingham, Alabama • Palo Alto, California • Stanford, California + 20 more
Source: ClinicalTrials.gov public record
Updated Sep 23, 2025 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 3 Interventional Results available

A Phase 3 Study of Tezacaftor (VX-661) in Combination With Ivacaftor (VX-770) in Subjects Aged 12 Years and Older With Cystic Fibrosis (CF), Who Have One F508del-CFTR Mutation and a Second Mutation That Has Been Demonstrated to be Clinically Responsive to Ivacaftor

NCT02412111
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Ivacaftor, Tezacaftor/Ivacaftor
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
156 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
33
States / cities
Birmingham, Alabama • Oakland, California • San Diego, California + 30 more
Source: ClinicalTrials.gov public record
Updated Jan 7, 2019 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 3 Interventional Results available

A Phase 3 Study to Evaluate the Efficacy and Safety of Ivacaftor and VX-661 in Combination With Ivacaftor in Subjects Aged 12 Years and Older With Cystic Fibrosis, Heterozygous for the F508del-cystic Fibrosis Transmembrane Conductance Regulator (CFTR) Mutation

NCT02392234
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-661/Ivacaftor, Ivacaftor, Placebo matched to VX-661/ ivacaftor, Placebo matched to Ivacaftor
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
248 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
47
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 44 more
Source: ClinicalTrials.gov public record
Updated Jun 11, 2018 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 2 Interventional Results available

Study of VX-661 Alone and in Combination With Ivacaftor in Subjects Homozygous or Heterozygous to the F508del-Cystic Fibrosis Transmembrane Conductance Regulator(CFTR) Mutation

NCT01531673
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-661, Ivacaftor, Placebo matched to VX-661, Placebo matched to ivacaftor
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
194 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
19
States / cities
Birmingham, Alabama • Oakland, California • Boise, Idaho + 16 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2018 · Synced Sep 2, 2026, 7:19 AM EDT
Not listed No phase listed Observational

Simultaneous quanTification of Elexacaftor/tezAcaftor/Ivacaftor Via Reverse Phase High Performance liquiD chromatographY

NCT05822102
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Not listed
Lead sponsor
National Jewish Health
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
2
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 23, 2023 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 3 Interventional Results available

A Phase 3 Study of VX-121 Combination Therapy in Participants With Cystic Fibrosis (CF) Heterozygous for F508del and a Minimal Function Mutation (F/MF)

NCT05033080
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
435 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
69
States / cities
Birmingham, Alabama • Tucson, Arizona • Little Rock, Arkansas + 61 more
Source: ClinicalTrials.gov public record
Updated Oct 2, 2024 · Synced Sep 2, 2026, 7:19 AM EDT
Terminated Phase 4 Interventional Results available

Novel Therapeutic Approaches for Treatment of CF Patients With W1282X Premature Termination Codon Mutations

NCT03624101
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Symdeko, Ivacaftor and Symdeko
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Apr 15, 2025 · Synced Sep 2, 2026, 7:19 AM 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, 7:19 AM EDT
Completed Phase 3 Interventional Results available

A Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study to Evaluate the Efficacy and Safety of VX-661 in Combination With Ivacaftor

NCT02347657
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
VX-661 Plus Ivacaftor Combination, Ivacaftor, VX-661 Plus Ivacaftor Combination Placebo, Ivacaftor placebo
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
12 Years and older
Enrollment
510 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
27
States / cities
Little Rock, Arkansas • Long Beach, California • Denver, Colorado + 24 more
Source: ClinicalTrials.gov public record
Updated Jun 11, 2018 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study Assessing the Safety, Tolerability, Pharmacokinetics, Food Effect, and Drug-Drug Interactions of PTI-801 in Healthy Volunteers, and Safety, Tolerability, and Pharmacokinetics of PTI-801 in Subjects With Cystic Fibrosis

NCT03140527
View directory record Official record
Conditions
Healthy Volunteer, Cystic Fibrosis
Interventions
PTI-801, Placebo, PTI-808
Drug
Lead sponsor
Proteostasis Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
171 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
33
States / cities
Birmingham, Alabama • Anchorage, Alaska • Stanford, California + 28 more
Source: ClinicalTrials.gov public record
Updated Apr 29, 2020 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate the Safety and Efficacy of Long-term Treatment With TEZ/IVA in CF Participants With an F508del CFTR Mutation

NCT03537651
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
TEZ/IVA, IVA
Drug
Lead sponsor
Vertex Pharmaceuticals Incorporated
Industry
Eligibility
6 Years and older
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
28
States / cities
Birmingham, Alabama • Anchorage, Alaska • Little Rock, Arkansas + 25 more
Source: ClinicalTrials.gov public record
Updated Apr 18, 2024 · Synced Sep 2, 2026, 7:19 AM EDT
Completed Phase 4 Interventional

Trikafta for Patients With Non-cystic Fibrosis Bronchiectasis

NCT05743946
View directory record Official record
Conditions
Non-cystic Fibrosis Bronchiectasis
Interventions
Trikafta
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 8, 2026 · Synced Sep 2, 2026, 7:19 AM EDT