Cipro
"I get chronic UTI's and kidney infections.  I recently found out that my chronic infections have led to scarring of my left kidney and both ureters so I go in for a cystoscopy and Videourodynamics in December.  Cipro is the only thing that works for me.  It works fast too.   I usually get bad headaches with this medicine, but I am prone to headaches as well...lucky me.  I always make sure I take good probiotics when I am on this medicine to replenish the gut flora.  Bactrim is weak and never works...Cipro is the only thing that works for me and my body.  Everyone's body is different so do your research and talk to your doctor about your concerns."