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VNZ/TEZ/D-IVA

Phase 3

Cystic Fibrosis | Small molecule | Respiratory |Vertex Pharmaceuticals Incorporated|Last Updated: Apr 29, 2026

Success Probability

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Trial Design

RandomizedCONTROLLED
Total Trials4
Total Enrollment236

FDA Designations

No designations recorded

Clinical trial landscape

VNZ/TEZ/D-IVA · 4 trials · 1 indication

Phase 3 1Phase 1 3
NCT05844449Evaluation of Long-Term Safety and Efficacy of Vanzacaftor/Tezacaftor/Deutivacaftor in Cystic Fibrosis Participants 1 Year of Age and OlderCystic Fibrosis
ENROLLING BY_INVITATION174 Analytics
PHASE3ENROLLING BY_INVITATION
Evaluation of Long-Term Safety and Efficacy of Vanzacaftor/Tezacaftor/Deutivacaftor in Cystic Fibrosis Participants 1 Year of Age and Older
Cystic FibrosisUnlock trial analytics

Study Endpoints

Primary Endpoints

Part A: Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs)
From Baseline up to Week 100
Part B: Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs)
From Baseline up to Week 196
Maximum Observed Concentration (Cmax) of Rosuvastatin in the Absence and Presence of VNZ/TEZ/D-IVA
Day 1 up to Day 23
Area Under the Concentration Time-curve (AUC) of Rosuvastatin in the Absence and Presence of VNZ/TEZ/D-IVA
Day 1 up to Day 23
Flavor Assessment Based on Flavor Profile Method of Descriptive Sensory Analysis per American Society for Testing and Material (ASTM) Approved Sensory Evaluation Method
Periodic Intervals up to 30 minutes post oral administration
Part A: Maximum Observed Plasma Concentration (Cmax) of VNZ, TEZ, and D-IVA
Pre-dose up to 288 hours Post-dose
Part B: Maximum Observed Plasma Concentration (Cmax) of VNZ, TEZ, and D-IVA
Pre-dose up to 384 hours Post-dose
Part A: Area Under the Concentration Versus Time Curve (AUC) of VNZ, TEZ, and D-IVA
Pre-dose up to 288 hours Post-dose
Part B: Area Under the Concentration Versus Time Curve (AUC) of VNZ, TEZ, and D-IVA
Pre-dose up to 384 hours Post-dose

Secondary Endpoints

Part A (All Cohorts): Absolute Change in Sweat Chloride (SwCl)
From Baseline Through Week 96
Part B: Absolute Change in Sweat Chloride (SwCl)
From Baseline Through Week 192
Part A (Cohort 1): Absolute Change in Percent Predicted Forced Expiratory Volume (ppFEV1)
From Baseline Through Week 100
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
VNZ/TEZ/D-IVAEXPERIMENTALPart A: Participants (Cohort 1: 6 through 11 years of age (inclusive); Cohort 2: 2 through 5 years of age (inclusive) and Cohort 3: 1 to less than (\<) 2 years of age) will receive VNZ/TEZ/D-IVA once daily at doses determined based on their age and weight. The age range is based on date of informed consent in parent study. Part B: Participants in Cohort 1 who meet the eligibility criteria will receive VNZ/TEZ/D-IVA for an additional 96 weeks.
VNZ/TEZ/D-IVA and RosuvastatinEXPERIMENTALRosuvastatin will be administered to participants as a single oral dose on Day 1 and then co-administered with VNZ/TEZ/D-IVA on Day 18.VNZ/TEZ/D-IVA dose will be administered once daily (qd) from Day 5 to Day 22.
Part A: Sequence 1EXPERIMENTALParticipants will receive VNZ/TEZ/D-IVA reference fixed dose combination (FDC) tablet in dosing period 1, then VNZ/TEZ/D-IVA test FDC granules dose level 1 in dosing period 2, and finally VNZ/TEZ/D-IVA test FDC granules dose level 2 in dosing period 3. A washout period of 14 days will be maintained between 3 dosing periods.
Part A: Sequence 2EXPERIMENTALParticipants will receive VNZ/TEZ/D-IVA test FDC granules dose level 1 in dosing period 1, then VNZ/TEZ/D-IVA test FDC granules dose level 2 in dosing period 2, and finally VNZ/TEZ/D-IVA reference FDC tablet in dosing period 3. A washout period of 14 days will be maintained between 3 dosing periods.
Part A: Sequence 3EXPERIMENTALParticipants will receive VNZ/TEZ/D-IVA test FDC granules dose level 2 in dosing period 1, then VNZ/TEZ/D-IVA reference FDC tablet in dosing period 2, and finally VNZ/TEZ/D-IVA test FDC granules dose level 1 in dosing period 3. A washout period of 14 days will be maintained between 3 dosing periods.
Part B: Sequence 1EXPERIMENTALParticipants will receive VNZ/TEZ/D-IVA test FDC granules under fasted condition in dosing period 1, then VNZ/TEZ/D-IVA test FDC granules under fed state in dosing period 2. A washout period of 18 days will be maintained between 2 dosing periods.
Part B: Sequence 2EXPERIMENTALParticipants will receive VNZ/TEZ/D-IVA test FDC granules under fed state in dosing period 1, then VNZ/TEZ/D-IVA test FDC granules under fasted condition in dosing period 2. A washout period of 18 days will be maintained between 2 dosing periods.

Interventions

NameTypeDescription
VNZ/TEZ/D-IVADRUGFixed-dose combination tablets or granules for oral administration.
RosuvastatinDRUGTablet for oral administration.
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Eligibility Criteria

Age Range1 Year to N/A
SexALL
Healthy VolunteersNo
Study Sites37

Key Inclusion Criteria: Parts A and B: • Participants who have completed study drug treatment in the parent study (VX21-121-105; NCT Number: NCT05422222) Part B: -Meets at least 1 of the following criteria: * Completed study drug treatment in Part A * Had study drug interruption(s) in Part A, b...

Countries:United StatesAustraliaCanadaFranceGermanyNetherlandsNew ZealandSwedenSwitzerlandUnited Kingdom
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Frequently asked questions about VNZ/TEZ/D-IVA

What is VNZ/TEZ/D-IVA used for?

VNZ/TEZ/D-IVA, also known as vanzacaftor/tezacaftor/deutivacaftor, is an investigational small molecule being developed for the treatment of cystic fibrosis. It is currently in Phase 3 clinical development and is being studied in patients as young as 1 year of age.

Who makes VNZ/TEZ/D-IVA?

VNZ/TEZ/D-IVA is being developed by Vertex Pharmaceuticals Incorporated, a biopharmaceutical company traded on the NASDAQ under the ticker symbol VRTX. The company is conducting clinical trials of this triple combination therapy for cystic fibrosis.

What phase is VNZ/TEZ/D-IVA in?

VNZ/TEZ/D-IVA is currently in Phase 3 clinical development for cystic fibrosis. The most advanced trial is a Phase 3 study evaluating long-term safety and efficacy in participants 1 year of age and older, which is currently enrolling by invitation.

What clinical trials is VNZ/TEZ/D-IVA in?

VNZ/TEZ/D-IVA has been studied in four clinical trials. The active Phase 3 trial is NCT05844449, evaluating long-term safety and efficacy in cystic fibrosis patients aged 1 year and older. Three Phase 1 trials (NCT06299696, NCT06299709, NCT07349394) have been completed, studying the drug in healthy participants.

Is VNZ/TEZ/D-IVA the same as vanzacaftor/tezacaftor/deutivacaftor?

Yes, VNZ/TEZ/D-IVA is the abbreviation for vanzacaftor/tezacaftor/deutivacaftor, a triple combination therapy. This naming convention is used in clinical trial documentation to refer to the fixed-dose combination of these three active pharmaceutical ingredients.