streptococcal infection
"Had an on again, off again strep virus for the last year.  24 hours later after taking Levaquin and I can tell a difference.  Obviously a powerful medicine.  If you are an experienced sinus/throat person and you've tried all of the over the counter medicine, alternative and weaker antibiotic version give this one a try.  There are risks to taking this medicine.  If you are not to sensitive, do it!  This seems to be the only one with any effect that I tried."