This clinical trial is focused on studying the disease known as polymyalgia rheumatica, which is a condition that causes muscle pain and stiffness, especially in the shoulders. The trial will evaluate the effectiveness and safety of a medication called baricitinib, which is also known by its code names LY-3009104 and INCB-028050. The study will compare the effects of baricitinib with a placebo, which looks like the medication but does not contain the active ingredient. The goal is to see if baricitinib can help reduce the need for glucocorticoids, a type of steroid medication, in people with new-onset polymyalgia rheumatica.
Participants in the study will take either baricitinib or a placebo in the form of film-coated tablets. The study will be conducted over several weeks, with participants receiving either 2 mg or 4 mg doses of baricitinib. The treatment period will last up to 44 weeks, during which the participants’ progress will be monitored. The study aims to achieve remission of the disease without the use of glucocorticoids, which are commonly used to manage symptoms but can have side effects when used long-term.
The trial will assess various outcomes, including the proportion of participants who achieve remission without glucocorticoids at different time points, the total amount of glucocorticoids used, and the number of relapses experienced by participants. Additionally, the study will evaluate patient-reported outcomes such as fatigue and pain levels, as well as laboratory markers of inflammation. The safety of baricitinib will also be closely monitored, including any side effects or changes in health indicators. The study is expected to conclude by the end of 2025.



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