What we are studying
The purpose of this study is to find out what effects, good and/or bad, adding the drug carfilzomib to regular treatment with dexamethasone has on you and your disease. Investigationers would like to compare a higher dose of carfilzomib to the lower dose that is usually used to find out which is better. The lower dose of carfilzomib is approved for treatment of your cancer. The higher dose is experimental. Therefore, carfilzomib is experimental for this study.