A Study to Learn if Taking BIIB141 (Omaveloxolone) Affects How Omeprazole is Processed in the Body and About BIIB141's Safety in Healthy Adults Aged 18 to 55

Exclusion Criteria

• •History of any clinically significant cardiac, endocrine, gastrointestinal, hematologic, hepatic, immunologic, metabolic, urologic, pulmonary, neurologic, dermatologic, psychiatric, or renal disease, or other major disease, as determined by the Investigator.
• •Clinically significant, as determined by the Investigator, 12-lead electrocardiogram (ECG) abnormalities.
• •History of, or positive test result at Screening for, human immunodeficiency virus (HIV).
• •History of hepatitis C infection or positive test result at Screening for hepatitis C virus antibody (HCV Ab).
• •Current hepatitis B infection \[defined as positive for hepatitis B surface antigen (HBsAg) and/or total anti-HBc\]. Participants with immunity to hepatitis B from previous natural infection (defined as negative HBsAg, positive anti-HBc, and positive anti-HBs) or vaccination (defined as negative HBsAg, negative anti-HBc, and positive anti-HBs) are eligible to participate in the study.
• •Chronic, recurrent, or serious infection (e.g., pneumonia, septicemia, and herpes simplex virus), as determined by the Investigator, within 90 days prior to Screening or between Screening and Day -1.
• •Symptoms of bacterial, fungal, or viral infection (including upper respiratory tract infection) within 14 days prior to Screening or between Screening and Day -1. Participants with local fungal infection (e.g., candidiasis, tinea) are eligible to be rescreened after successful treatment of the infection.
• •Prior exposure to omaveloxolone.