Yeah I used to think dry mouth was “just” annoying when I took 30mg Ditropan/Oxybutynin, until that dry mouth necessitated seven root canals, nine crowns, 1-4 cavities IN EVERY. SINGLE. TOOTH., and permanent gum damage. I only took Ditropan for three years and that happened. Now my dentin is permanently exposed, for life. I’m at my dentist as I type this. 10 further cavities and a crown just since January 2020, and that’s AFTER I quit taking Ditropan. Dry mouth screwed my teeth for life. In my entire life prior to Ditropan, I’d only had four cavities. So watch out when a medication lists a primary side effect of dry mouth. I know of all the bladder medications, Ditropan causes the driest mouth. Myrbetriq doesn’t cause any, works totally differently. Myrbetriq is a new medication while Ditropan is a 100-years-old crappy medication. I don’t know why I took it so long (2.5 years); it definitely makes OAB more frequent and painful.