@rafcer
I’ve had many catheters and my experience has been frequent urine urges for at least 24 hours after each one. My immediate concern, after the doctor explained how the BCG treatments were going to work, was all the catheters that would be required. She said that I would get used to them. I can’t say that I ever got used to them but after a while I did get where I knew what to expect. The secret to them really is to relax, as hard as that is to do. The only side effect I had from the treatments was burning for the first few urinations after the treatment. As I said above the frequent urine urges would continue through the night. I did not have any diet changes. You can get through it. Hope this helped.