Hi Diane,
Since I was diagnosed with cepacia some 10+ years ago, I have also been on chronic antibiotics. Back then it was ceclor and bactrim. I got tired of taking two of them, so I am only taking Bactrim. I have spoken to my doctor about stopping the Bactrim too, and he says that is fine. I just haven't gotten up the guts to do it yet.
My theory is that I have been on Bactrim for so long that it can't possibly be helping me. Before I started nasal irrigation, I was always getting sinus infections....why didn't the Bactrim protect against that?