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A Study to Learn How Different Manufactured Products of the Study Medicine Called Ritlecitinib are Taken up Into the Blood in Healthy Adults When Taken on an Empty Stomach or When Taken With a Meal in Healthy Adults.

This study looks at how a new medicine, ritlecitinib, gets into the blood of healthy adults. We're testing different versions of the medicine, both when taken on an empty stomach and with food. It could help people with conditions like ulcerative colitis or alopecia.