This is a prospective, multicenter, randomized, double-blind, placebo-controlled, 2-parallel group, phase 3 study to compare efficacy and safety of masitinib 9 mg/kg/day to placebo in the treatment of patients with relapsing multiple myeloma who received one previous therapy.~Patients will receive study treatment (masitinib/placebo) with the standard therapy (bortezomib and dexamethazone).
The purpose of the study is to compare the efficacy and safety of masitinib 6 mg/kg/day in combination with bortezomib and dexamethasone to placebo in combination with bortezomib and dexamethasone in the treatment of patients with relapsing multiple myeloma who have received one previous therapy.