Study Investigating Blood Levels of Caffeine, Efavirenz, and Omeprazole When Taken Before and
After Abrocitinib in Healthy Participants. A Phase 1, Open-Label, Fixed-Sequence, 2-Period Study to Estimate the Effect of Multiple Dose Abrocitinib on the Pharmacokinetics of Single Doses of Caffeine, Efavirenz, and Omeprazole in Healthy Participants.