sinusitis
"My brother took this and felt very anxious, my only side effect is feeling super tired and kind of out of it.  It really helped my cough and I think it is starting to help with my chronic sinus infection.  I am allergic to Levaquin so I was nervous taking it since it is in the same drug family.  I did not have the same reactions that I had when I was taking Levaquin.  I have had 5 sinus infections in the past 6 months and the Z-pac has quit working....so overall things are getting better."