- Have a documented diagnosis of multiple myeloma and have relapsed and refractory disease. Patients must have received at least 2 prior therapies. Patients must have relapsed after having achieved at least stable disease for at least one cycle of treatment to at least one prior regimen and then developed PD. Patients must also have documented evidence of PD during or within 60 days (measured from the end of the last cycle) of completing treatment with the last anti-myeloma drug regimen used just prior to study entry (refractory disease)