@jrs619 My radiation cystitis hit a year later, with back to back UTIs and hematuria. I never had leakage, but I did have my detrusor muscle go into overdrive and leave me afraid to go far from the house, even with pads or absorbent briefs on.

Eventually, Myrbetriq helped the detrusor muscle relax (it took 2× the initial dose), and dietary tweaks calmed down the irritation. I titrated off Myrbetriq after a year.

3½ years later, things are almost back to normal now, except that I go to the bathroom a bit more frequently and get up 1–2× most nights. But I managed a redeye to Europe OK.

Counterintuitively, the biggest help is drinking lots of water. You'd think it would make incontinence worse, but it actually dilutes irritants and flushes them out of the bladder.