Hi Mary, it's good to hear that your husband is mostly doing well. I do know about this, sometimes known by other names as well.
http://www.mayoclinic.org/tests-proc...h/faq-20058071
I did not use it for my mouth GVHD, but I used it once for severe dry mouth for some other reason a long time ago. And speaking of cavities, I have not had any since my trans 4 yrs ago, and my dentist has not noticed any mouth abnormalities post-trans. I do know that the pre and post trans treatment(s) can cause a lot of diff probs and that everyone reacts in a diff way.
Mario