A Study of Bortezomib, Cyclophosphamide, and Dexamethasone in Patients With Untreated Multiple Myeloma and Planned for a High Dose Chemotherapy

In Part 1, cyclophosphamide with dose ranging from 900 to 1500 mg will be administered intravenously on Day 1 of each 21 day cycle for 3 cycles to determine optimal dose. In Part 2, optimal dose determined in Part 1 will be administered on Day 1 of each 21 day cycle for 3 cycles.

Bortezomib 1.3 mg/m2 will be administered intravenously on Days 1,4,8, and 11 of each 21 day cycle for 3 cycles in both parts (Part 1 and Part 2).

Participants will receive dexamethasone 40 mg orally or intravenously on Days 1, 2, 4, 5, 8, 9, 11, and 12 of each 21 day cycle for 3 cycles in both parts (Part 1 and Part 2).