question: What is the treatment for taking a suplfa antibiotic for a UTI and the drug killing all the good bacteria along with the bad? I have had all kinds of tests and everything comes back normal. I am having lower abdominal pain which will move to my right side and to my back. Doesn t bother me one bit when I lay down. Been suffering for about 3 1/2 months with this. Never gets any worse just constant and aggravating. Eating lots of live culture yogurt and taking probiotics.