I have had tumors in my bladder twice and burned twice so far. I have now started the chemo. treatments of G?? . I ve had 4 so far and atlease two more to go. I was told to take pyridium for my burning and pain when I urinate. But, after reading about it causing cancer, I am afraid to start it! I ve had cancer in the prostate and had it removed and it had ate thru, so I had to have radiation. I had kidney cancer and I had to have my right kidney removed also! So, I am quite concerned whether to take pyridium? Could you please give me some of your advise?