How is multiple myeloma treated?

Patient: Multiple myeloma
In May 2009, a pathological fracture of the right upper arm humerus was detected by bone marrow aspiration, and the tumor cells were about 20%. He was given oral Marfan every 28 days (7 tablets on the first day, 8 tablets on the second day, 7 tablets on the third day and 8 tablets on the fourth day for four days) and prednisone at the same time for one course of treatment.
In September 2009, the blood test showed that the white blood cells were low and the tumor cells were reduced to about 10% by puncture test.
In September 2009, the blood test showed low white blood cells, and the tumor cells in the puncture test were reduced to about 10%, and the treatment was oral Marfan (4 tablets per day for four days) every 28 days, and prednisone (7 tablets per day for five days) + thalidomide (4 tablets per day for four days). Due to the pain in the leg bones, Eppen has been infused every 28 days since September.
Now the patient feels weakness in her legs and has difficulty moving around. Since March 28th, he has been receiving antibiotic injections, interferon & 2B, and Tebteo, and taking oral thalidomide 6 tablets/day.
I would like to ask the doctor what is the best treatment?
Laboratory and examination results: blood test on March 26, 2010, leukocytes 1.62L, platelets 37L, tumor cells 21.5%; blood test on April 2, 2010, leukocytes 1.95L, platelets 13L, red blood cells 2.22.
Last hospital visit: Jing, Department of Hematology, Beijing 301 Hospital, Luoyang City Three Hospitals