I know this is something that may not be apt for a Sunday morning but here goes. I recently ( the day before my wedding) suddenly had a full blown bout of cystitis. I take the pill back to back without break and have done for a year or so. I ended up having 3 lots of antibiotics, and it still wouldn't go. It spread to my kidneys and I was very worried. I stopped the pill and had 7 days of bleeding and wow uti gone without trace. I wont be going back to the pill back to back. Does anyone else use the pill back to back and do you have any problems