This clinical trial is focused on studying a condition known as juvenile idiopathic arthritis, which is a type of arthritis that affects children and teenagers. The study will use a medication called filgotinib, which is available in two forms: Jyseleca 100 mg film-coated tablets and Jyseleca 200 mg film-coated tablets. Additionally, a version of the medication known as GLPG0634 will also be used. The purpose of the study is to understand how the body processes filgotinib in children and teenagers with this type of arthritis.
Participants in the study will take the medication orally, which means they will swallow the tablets. The study will involve multiple doses of the medication, and researchers will monitor how the medication is absorbed and processed in the body. This will help determine the safety and tolerability of filgotinib in young patients. The study will also look at any side effects that may occur and how well the participants accept the tablets.
The study is designed to gather important information about the medication’s effects in children and teenagers aged 8 to less than 18 years. By understanding how filgotinib works in younger patients, researchers hope to improve treatment options for those with juvenile idiopathic arthritis. The study will continue until the end of 2024, providing valuable insights into the use of filgotinib for this condition.



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