Study of Fluphenazine in Relapsed or Relapsed-and-Refractory Multiple Myeloma

Fluphenazine HCl will be administered intravenously. To quickly reach and maintain the target bone marrow concentration for 18 hours, the study drug will be administered using 3 bolus injections (0, 6, and 12 hours). Fluphenazine will be dose-escalated according to a modified Fibonacci scheme, terminating in 40% increments. Treatments will be administered on days 1 and 8 of every 21 day cycle.