A Phase 1, Randomized, Double-Blind, Placebo-Controlled, Multiple-Dose Study to Assess the Safety, Tolerability, and Pharmacokinetics of BIIB104 in Healthy Japanese and Non-Japanese Participants

The primary objective of the study is to evaluate the pharmacokinetics (PK) of BIIB104 in healthy Japanese and non-Japanese participants. The secondary objective of the study is to evaluate the safety and tolerability of multiple, oral doses of BIIB104 administered twice daily (BID) for 9 days, with an additional dose occurring in the morning on Day 10 in healthy Japanese and non-Japanese participants.