for people ages 12 years and up (full criteria)
at Fresno, California and other locations
study started
estimated completion:



Study VX16-661-114 (Study 114) is a Phase 3b, randomized, double-blind, placebo-controlled, parallel group, multicenter study in subjects aged 12 years and older with CF who are homozygous for the F508del mutation on the CFTR gene and who discontinued treatment with Orkambi due to respiratory symptoms considered related to treatment. This study is designed to evaluate the safety and efficacy of TEZ/IVA.

Official Title

Phase 3b, Randomized, Double-blind, Placebo-controlled, Parallel Group Study to Assess the Safety, Efficacy, and Tolerability of Tezacaftor/Ivacaftor (TEZ/IVA) in an Orkambi-experienced Population Who Are Homozygous for the F508del CFTR Mutation


Cystic Fibrosis Fibrosis Ivacaftor TEZ/IVA IVA Tezacaftor/Ivacaftor (TEZ/IVA)


You can join if…

Open to people ages 12 years and up

  • Willing and able to comply with scheduled visits, treatment plan, study restrictions,laboratory tests, contraceptive guidelines, and other study procedures.
  • Prior discontinuation of Orkambi, with at least 1 respiratory sign or symptom considered related to therapy.
  • Resolution or stabilization of qualifying event(s) >28 days prior to Screening.
  • Discontinuation of Orkambi therapy must have occurred <8 weeks from the first dose of Orkambi.
  • Homozygous for F508del mutation in the CFTR gene as documented in the subject's medical record. If genotype documentation is not available in the medical record,genotyping will be performed during screening.
  • FEV1 ≥25% and ≤90% of predicted normal for age, sex, and height.
  • Stable CF disease as judged by the investigator.
  • Other protocol defined inclusion criteria could apply.

You CAN'T join if...

  • History of any comorbidity that, in the opinion of the investigator, might confound the results of the study or pose an additional risk in administering study drug to the subject.
  • Recent rapid or progressive deterioration in respiratory status.
  • Receiving continuous oxygen at >2L/min or on face-mask ventilation.
  • Any protocol-defined exclusionary laboratory values at Screening.
  • Child-Pugh Class B or C hepatic impairment.
  • An acute upper or lower respiratory infection, pulmonary exacerbation, or change in therapy for pulmonary disease within 28 days before Day 1.
  • Documentation of colonization with organisms associated with a more rapid decline in pulmonary status.
  • History of lung transplantation since most recent initiation of Orkambi.
  • History of alcohol or drug abuse in the past year as deemed by the investigator.
  • Participation in an investigational drug study or use of a CFTR modulator within 28 days or 5 terminal half-lives of the investigational drug or modulator (whichever is longer).
  • Use of restricted medications or foods within the specified window before the first dose of study drug, or an anticipated need or use of restricted medication or foods after the first dose of study drug.
  • Pregnant or nursing females: Females of child-bearing potential must have a negative pregnancy test at Screening and Day 1.
  • Other protocol defined exclusion criteria could apply.


  • UCSF - Fresno, Community Regional Medical Center
    Fresno California 93721 United States
  • Children's Hospital Los Angeles
    Los Angeles California 90027 United States
  • Miller Children's Hospital / Long Beach Memorial
    Long Beach California 90806 United States


in progress, not accepting new patients
Start Date
Completion Date
Vertex Pharmaceuticals Incorporated
Phase 3
Study Type
Last Updated
July 18, 2018