This clinical trial is focused on studying Cystic Fibrosis, a genetic condition that affects the lungs and digestive system. The study will evaluate a new treatment involving a combination of three medications: VX-121, Tezacaftor, and Deutivacaftor. These medications are taken as a film-coated tablet and are designed to work together to help improve the function of a protein that is defective in people with Cystic Fibrosis.
The purpose of the study is to assess how the body processes these medications and to ensure they are safe and well-tolerated in children aged 1 to 11 years. Participants will be divided into different groups, and the study will be conducted in two parts. In the first part, the focus will be on understanding how the medications are absorbed and processed by the body. In the second part, the safety and tolerability of the treatment will be monitored over a period of 24 weeks.
Throughout the study, participants will receive either the combination of VX-121, Tezacaftor, and Deutivacaftor or a placebo. The study aims to gather information on any side effects and how the treatment affects the symptoms of Cystic Fibrosis. This research is important for developing new therapies that could improve the quality of life for those living with this condition.



Belgium
France
Germany
Sweden
The Netherlands