I am being treated with BCG for my NMIBC Ta-T1, an approach I tried to learn about from my surgeon and through my own research. Two different nurses have done my installations, four to date, and I noticed something that concerned me. The amount of sterile solution that contained the BCG was quite different depending on the nurse, either 50ml, or 2-3 times that amount. That amount seems relevant as BCG is dissolved in solution and the standard is 50ml. When I asked about it, the nurse today said it didn't matter. Really? I telephoned Merck and spoke at length to a representative who carefully explained that there is a distinct procedure for preparing the product, and that she couldn't speak to my particular caregiver and her protocol, but she suggested this: Merck will send her a letter indicating my concerns about how the product is being administered. I am now worried that I may have received a diluted dose which hasn't been effective and has been a waste of time and product. This is one more thing I am anxious about. My surgeon is out of office until next week; can anyone suggest anything else I can do?