An Open-Label, Phase 1 Study in Healthy Adult Subjects to Examine the Effects of Multiple-Dose Ciprofloxacin on Ivacaftor and VX-661 in Combination With Ivacaftor

Study Overview
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Brief Summary
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To evaluate the effect of ciprofloxacin on the pharmacokinetics (PK) of ivacaftor and on the pharmacokinetics of VX-661 when administered in combination with ivacaftor

Official Title
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An Open-Label, Phase 1 Study in Healthy Adult Subjects to Examine the Effects of Multiple-Dose Ciprofloxacin on the Multiple-Dose Pharmacokinetics of Ivacaftor and on the Multiple-Dose Pharmacokinetics of VX-661 Administered in Combination With Ivacaftor

Conditions
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Cystic Fibrosis

Intervention / Treatment
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* Drug: ivacaftor
* Drug: VX-661
* Drug: ciprofloxacin


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Willing and able to comply with scheduled visits, treatment plan, study restrictions,laboratory tests, contraception guidelines, and other study procedures Healthy subjects, as defined by no clinically relevant abnormalities identified by a detailed medical history and full physical examination, including blood pressure and heart rate measurement, standard 12-lead ECG, and clinical laboratory tests. Body mass index (BMI) of 18.0 to 31.0 kg/m2, inclusive, and a total body weight >50 kg Female subjects of childbearing potential must have a negative serum pregnancy test at screening and at the Day -1 Visit. Exclusion Criteria: History of any illness, clinical condition, or other factor that, in the opinion of the investigator or the subject's general practitioner, might confound the results of the study or pose an additional risk in administering study drug(s) to the subject Inability to swallow capsules, or inadequate venous access. History of febrile illness within 5 days before the first study drug dose A screen positive for hepatitis B surface antigen, hepatitis C virus antibody, or human immunodeficiency virus 1 or 2 antibodies. For female subjects: Pregnant or nursing subjects and female subjects of childbearing potential who are unwilling or unable to use an acceptable method of contraception as outlined in this protocol. For male subjects: Subject has a female partner who is pregnant, nursing, or planning to become pregnant during the study or within 120 days after the last study drug dose. Any condition possibly affecting drug absorption Abnormal renal function at screening

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 55 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Non-Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Cohort 1<br>participants in Cohort 1 will be administered ivacaftor alone followed by ivacaftor with concomitant ciprofloxacin. | Drug: ivacaftor<br> <br> Drug: ciprofloxacin<br> <br> |
| Experimental: Cohort 2<br>Participants in Cohort 2 will be administered VX-661 in combination with ivacaftor followed by VX-661 in combination with ivacaftor and concomitant ciprofloxacin | Drug: ivacaftor<br> <br> Drug: VX-661<br> <br> Drug: ciprofloxacin<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| PK parameters of ivacaftor and metabolites following concomitant dosing with ciprofloxacin relative to ivacaftor administered alone | PK Parameters - maximum observed plasma concentrations (Cmax) and area under the concentration versus time curve (AUC), | Day 7, Day 14 | 
| PK parameters of VX-661 and metabolites when dosed in combination with ivacaftor and concomitant ciprofloxacin relative to VX-661 administered in combination with ivacaftor | PK parameters - maximum observed plasma concentrations (Cmax) and area under the concentration versus time curve (AUC), | Day 10, Day 20 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| PK parameters of ivacaftor and metabolites when administered in combination with VX-661, with and without concomitant ciprofloxacin | PK Parameters - maximum observed plasma concentrations (Cmax) and area under the concentration versus time curve (AUC), | Day 10, Day 20 | 
| Safety and tolerability, as assessed by adverse events (AEs), vital signs, ECGs and laboratory assessments |  | Day 1 through Day 21 (cohort 1) or Day 34 (cohort2) |