I have discoid lupus and Sjogrens - haven't slept well for over a year. My mouth is so dry and painful even with sprays. Sjogrens magazine popped thou the door and a fellow sufferer had written about Xylimelts made in USA but available here at mouth ulcers.co.uk - you can't buy them anywhere else so far. You put the darker side of disc to your gum and it slowly melts during the night. They work! Have much improved sleep since - now if only they had similar for the eyes. I had to share this in the hope that it would help others. Good luck everyone.