Dave, I had a dry mouth problem too. If I put the candy in the usual place it didn't last long. But if I placed it between my teeth and my cheek it lasted the entire night and seemed to do the trick. Somehow, I no longer have the problem so I suspect it was not a PD problem. We tend to blame PD for all our ills. Does any other PWP have dry mouth? Just how common is it? Sid Levin