I had my husband go with me the first time I had BCG, as much for moral support as for driving as we are only 5 minutes from the hospital, but after that I went alone. I found that I did have some pain and spasms, especially the first few times I urinated after the instillation. However, I even had spasms after cystoscopy, so it wasn't unexpected. Sitting in a hot tub helped (in between trips to the toilet). If you find you have problems after your first treatment, you can ask your Dr. to give you a prescription for one of the medications given for "irritable bladder" and take that ahead of time. I used to take that plus a couple of ibuprufen beforehand. They will give you instructions about not drinking for a number of hours beforehand and emptyping your bladder right before the BCG instillation. The nurse also gave me a good tip which was to start drinking a lot of water about 1/2 hour before the 2-hour "holding" period is up and to keep drinking a lot thereafter. This will help flush the BCG out and thereby cut down on the irritative symptoms.
Over time if the symptoms are very severe they can cut the dose back to 1/3rd or even 1/10th and still have the same effect.
Best of luck to you!
Ann
Small TA Grade 1, May-06; recur (2 tiny), same, June-08; TURBTs both times. BCG begun July-08, dosage to 1/3rd May-10, completed treatment December-11. All clear since 2008.