M14-031: This phase III trial is evaluating two drugs (bortezomib and dexamethasone) in combination with a chemotherapy drug (venetoclax) for the treatment of Multiple MyelomaA Phase 3, Multicenter, Randomized, Double Blind Study of Bortezomib and Dexamethasone in Combination With Either Venetoclax or Placebo in Subjects With Relapsed or Refractory Multiple Myeloma Who Are Sensitive or Naive to Proteasome Inhibitors

Exclusion

• Participant is refractory to any proteasome inhibitor, defined as progression on or within 60 days of the last dose of a proteasome inhibitor-containing regimen.
• Participant has had prior treatment with proteasome inhibitor within 60 days prior to first dose of study drug.
• Participant has any of the following conditions:

Non-secretory multiple myeloma, active plasma cell leukemia i.e., either 20% of peripheral white blood cells or greater than 2.0 X 10^9/liter (L) circulating plasma cells by standard differential, Waldenstrom's macroglobulinemia, amyloidosis, POEMS syndrome (polyneuropathy, organomegaly, endocrinopathy, monoclonal protein, and skin changes), known Human Immunodeficiency Viral (HIV) infection, active hepatitis B or C infection based on blood screen tests, significant cardiovascular disease, including uncontrolled angina, severe or uncontrolled arrhythmia, recent myocardial infarction within 6 months of randomization, or congestive heart failure New York Heart Association (NYHA) Class ≥ 3, major surgery within 4 weeks prior to randomization, acute infections requiring parenteral therapy (antibiotic, antifungal, or antiviral) within 14 days prior to randomization, peripheral neuropathy ≥ Grade 3 or ≥ Grade 2 with pain within 2 weeks prior to randomization, uncontrolled diabetes or uncontrolled hypertension within 14 days prior to randomization, any other medical condition that, in the opinion of the Investigator, would adversely affect the participant's participation in the study

• Participant has a history of other active malignancies, including myelodysplastic syndrome (MDS), within the past 3 years prior to study entry, with the following exceptions: Adequately treated in situ carcinoma of the cervix uteri or the breast, basal cell carcinoma of the skin or localized squamous cell carcinoma of the skin, prostate cancer Gleason grade 6 or lower AND with stable Prostate Specific Antigen (PSA) levels off treatment, previous malignancy with no evidence of disease confined and surgically resected (or treated with other modalities) with curative intent and unlikely to impact survival during the duration of the study
• If participant had prior allogeneic stem cell transplant (SCT), participant has evidence of ongoing graft-versus-host disease (GvHD)