I've been on a 7 day regime of Levaquin 500mg for an a infection that wasn't cured by other antibiotics and I can say it's worked. Yea I had a some muscle craps in the legs and some leg pain and a first day bout of nausea but overall, it's worked great for me.
I'd suggest that anyone on it do as my doctor said and either eat at least 1 cup of yogurt a day and/or take a Probiotics pill. The antibiotic/any antibiotic kills the "good germs" that help raise your bodies immune system and helps with digestion and the Yogurt/Probitic pills help grow the "good bacteria" back and ease the side effects while on it. Good luck to all