xerostomia
"I take Vesicare for an overactive bladder.  It helps a lot, but the side effect is extreme dry mouth!!  

I tried Bioteen and didn't like the taste.  I then tried TheraBreath lozengers which seemed to help, but I didn't like waking up in the night and needing to suck on a strong mint flavored lozenger.

When I tried Mouthkote spray I had instant relief and it left no real bad taste in my mouth.  The bottle is next to me at night, so when I wake up with a Sahara desert in my mouth, I simply spray a couple times into my mouth, swish it around for 10 seconds, and fall right back to sleep."