Overview A Study to Evaluate Safety and Pharmacokinetics of VX-659 in Healthy Subjects and in Adults With Cystic Fibrosis Status: Completed Trial end date: 2017-08-01 Target enrollment: Participant gender: Summary Evaluate the safety and tolerability of VX-659 in healthy subjects Phase: Phase 1 Details Lead Sponsor: Vertex Pharmaceuticals IncorporatedTreatments: IvacaftorVX-659