Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Interventional
Official Title: A Pilot Feasibility Study of Metformin/Ritonavir Combination Treatment in Patients With Relapsed/Refractory Multiple Myeloma or Chronic Lymphocytic Leukemia
Brief Summary: This pilot clinical trial studies the side effects and best dose of metformin hydrochloride and ritonavir in treating patients with multiple myeloma or chronic lymphocytic leukemia that has returned after a period of improvement or has not responded to treatment. Metformin hydrochloride and ritonavir may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth.