Have you tried it? It's used in many "sugar free" products. My naturopath, Jill Clarey, recommends it. But I always like to have more than one opinion!
I struggle with dry mouth, due to some of the prescriptions that I use to manage my chronic pain. Especially at night, sometimes it feels like my lips are glued together, or I wake coughing because I have no spit left! My dentist gave me a sample of Xylimelts, and I'm hooked! They are like breath mints (you can get mint or mint-free) but they have a sticky disc on one side so that it actually sticks to your teeth. So, I stick it to a molar and my saliva glands work more and I can sleep better. I have found that these last between 2-4 hours - much longer than pastes, gels, or tapes. They are sweetened with xylitol, which doesn't cause tooth decay or sugar issues. I highly recommend Xylimelts (even though they're not actually food) for those who deal with dry mouths.