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VX-561

Phase 2

Cystic Fibrosis | Small molecule | Respiratory |Vertex Pharmaceuticals Incorporated|Last Updated: Jan 25, 2022

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindACTIVE_CONTROLLEDBiomarker
Total Trials1
Total Enrollment77
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03911713A Phase 2 Study to Evaluate Efficacy and Safety of VX-561 in Subjects Aged 18 Years and Older With Cystic FibrosisPHASE2 COMPLETED 77Apr 17, 2019Aug 20, 2020Jan 25, 202248 United States, Australia +5
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Study Endpoints
Primary Endpoints
Absolute Change in Percent Predicted Forced Expiratory Volume in 1 Second (ppFEV1)
From Baseline at Week 12

FEV1 is the volume of air that can forcibly be blown out in one second, after full inspiration.

Secondary Endpoints
Absolute Change in Sweat Chloride (SwCl)
From Baseline at Week 12
Observed Pre-Dose Concentration (Ctrough) of VX-561 and Its Metabolites (M1-VX-561 and M6-VX-561) and IVA and Its Metabolites (M1-IVA and M6-IVA)
At Week 4
Safety and Tolerability as Assessed by Number of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)
Baseline up to Week 16
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
IvacaftorACTIVE_COMPARATORParticipants received IVA 150 milligrams (mg) orally every 12 hours (q12h) in the treatment period for 12 weeks.
VX-561: 25 mgEXPERIMENTALParticipants received VX-561 25 mg orally daily (qd) in the treatment period for 12 weeks.
VX-561: 50 mgEXPERIMENTALParticipants received VX-561 50 mg orally qd in the treatment period for 12 weeks.
VX-561: 150 mgEXPERIMENTALParticipants received VX-561 150 mg orally qd in the treatment period for 12 weeks.
VX-561: 250 mgEXPERIMENTALParticipants received VX-561 250 mg orally qd in the treatment period for 12 weeks.
Interventions
NameTypeDescription
VX-561DRUGVX-561 tablets for oral administration.
IVADRUG150-mg film-coated tablet for oral administration.
PlaceboDRUGPlacebo matched to IVA.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites48

Key Inclusion Criteria: * Must have 1 of the following 9 CFTR mutations on at least 1 allele: G551D, G178R, S549N, S549R, G551S, G1244E, S1251N, S1255P, or G1349D * On ivacaftor therapy * FEV1 value ≥40% and ≤100% of predicted mean for age, sex, and height Key Exclusion Criteria: * History of cli...

Countries:United StatesAustraliaBelgiumGermanyIrelandNetherlandsUnited Kingdom
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