Thalidomide, Dexamethasone, and Clarithromycin in Treating Patients With Multiple Myeloma Previously Treated With Transplant

This phase II trial studies the side effects and how well giving thalidomide, dexamethasone, and clarithromycin together works in treating patients with multiple myeloma previously treated with transplant. Biological therapies, such as thalidomide and clarithromycin, may stimulate the immune system in different ways and stop cancer cells from growing. Dexamethasone also works in different ways to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Giving thalidomide together with dexamethasone and clarithromycin after a transplant may be an effective treatment for multiple myeloma