Posted 11/9/2018 8:06 PM (GMT 0)
The longer you can hold it the better! They're topical and have an almost immediate effect and even if you evacuate then some of it is still retained. So multiple hours is good. It'd be great if you could hold it for 7 or more hours, but with UC urgency and many bms within a day it might be a bit hard.
Certainly, you could ask about a steroid suppository/foam/enema to heal things down there for a week or two before going back to Canasa, could make a big difference in your ability to retain canasa.