I've been prescribed Bactrim until I can get in to see the urologist next month to deal with a recurring serratia marcescens infection. Even with the Bactrim it appears I've picked up a UTI during my recent hospital stay, presumably something that is not sensitive to Bactrim. I've yet to get a positive c&s on this current infection, but nonetheless all the symptoms are there. I'll add that EVERY time I've had a foley in a hospital I've contracted a UTI. If I have a UTI that won't respond to Bactrim, can I take Cipro (or something else) in addition to the Bactrim, at least until I see my urologist next month?