A Phase 1b/2 Open-Label, Multicenter Study to Evaluate the Safety and Efficacy of TAK-981 in Combination With Monoclonal Antibodies in Adult Patients With Relapsed and/or Refractory Multiple Myeloma

TAK-981 is being tested in combination with anti-CD38 monoclonal antibodies (mAbs) to treat participants who have relapsed or refractory multiple myeloma (RRMM).The main aims of the study are to evaluate the safety and efficacy of TAK-981 in combination with anti-CD38 (mAbs) and to determine the recommended Phase 2 dose (RP2D).Participants will be on this combination treatment for 28-day cycles. They will continue with this treatment until disease progression or unacceptable toxicity.