What's the alternative to antibiotics?

I had a bladder infection once in college, and I thought I was going to die from the pain.  So I fully understand the need for a quick fix—antibiotics.  However...if you're prone to UTIs, as some women are, repeated use of antibiotics can be rough on your body. (Not only that, they'll stop working eventually, as the e.coli bacteria learn resistance to them.)   A good friend recently had an extremely scary allergic reaction to Cipro, which she'd been prescribed repeatedly (over several years) to treat a chronic UTI. Anyway, as a result, I pitched this "What's the Alternative?" to Prevention.