 4. Concomitant medications that include corticosteroids except as indicated for other medical conditions or up to 100 mgs of hydrocortisone or equivalent as premedication for administration of certain medications or blood products, chemotherapy, or other therapy that is or may be active against myeloma within 2 weeks prior to Cycle 1 Day 1. Nitrosoureas must be discontinued 6 weeks prior to Cycle 1 Day 1. 