sinusitis
"I have never reacted to an antibiotic, Ever, In my whole life.  Until now.  Within 30 mins of taking Avelox, I was experiencing nausea, sweats, shortness of breath, heart flutters.  I was so weak I had to be carried to bed.  Then the vomiting started, it was short-lived, but violent.  It also has many NSAID contraindications, so be careful.  Especially if your sinus infection is very painful, watch what you take.  Glad to see it's worked for some - but for me."