Thanks for your message Jan -- my urologist has also put me on 300mg of Progout which is a gout medication as well as two sachets of Ural every day in an effort to stop me from producing any more 'sand', so heres hoping that it works. It sounds similar to what your husband is taking. He took samples of the sand and its been sent off to the lab so hopefully he will know exactly what we are dealing with before too long. I'm expecting him to call me when the results come back, but if he doesn't I'll give him a ring in a week or so. Because Revlimid is so new I'm sure that there will be comments from others in the future regarding kidney stones -- probably not many, but some. I was speaking to a highly regarded Australian oncologist and he said that my reaction to Revlimid (20mos. paraprotein down from90-8 and NO dexamethasone) is very unusual, however he does have one patient who has been on it for 4 years with a paraprotein of 2 and its still working well. I hope that this continues for me, but I do need to find ways of getting rid of the kidney sand production without giving up the Revlimid!! Thanks again for your message!! Cath