In addition to other the other replies (Augmentin, Bactrim, Doxy, etc.), I would definitely try Pepto Bismol tablets. For me, worked just as well as any other antibiotic. I was able to be on them for around an entire year before it stopped being effective. And interestingly enough, I tried it again just 2 days ago not expecting it to do anything, and it works again! May not last long, but I'll take it :-)