Effect of Phenytoin or Itraconazole on How BGB-16673 is Absorbed and Removed From the Body in Healthy Participants

Inclusion Criteria: * Male or female, of any race, between 18 and 65 years of age * In good health, as determined by no clinically significant findings from medical history,12- lead ECG and vital signs measurements, physical examination and clinical laboratory evaluations * Body mass index between 18.0 and 32.0kg/m2, inclusive Exclusion Criteria: * Significant history or clinical manifestation of any metabolic, allergic, dermatological, hepatic, renal, hematological, pulmonary, cardiovascular, gastrointestinal, neurological, respiratory, endocrine, or psychiatric disorder, as determined by the investigator or designee. * Evidence of any infections (bacterial, viral, fungal, parasitic) within 4 weeks prior to the first dose of study drug, as determined by the investigator (or designee). * History of malignancy, except for appropriately treated carcinoma in situ of the cervix or nonmelanoma skin carcinoma not requiring ongoing systemic treatment. * History of stomach or intestinal surgery or resection that would potentially alter absorption and/or excretion of orally administered drugs (uncomplicated appendectomy and hernia repair are allowed). * Participants who have acute gastrointestinal symptoms at the time of screening and or/admission (eg, nausea, vomiting, diarrhea, or heartburn).