Levofloxacin
"I am immunodeficient and need antibiotics often. My doctors try to stay with the older generations of antibiotics for a lot of things, plus I'm allergic to a lot of them now; and Levaquin is prescribed for when I am having acute issues like sinus infection and it does work very well. I have never had any of the bad side effects from it other than feeling a bit out of sorts, maybe an upset stomach, but I'm also sick while taking it so I would feel "off" regardless. Unfortunately (because it's a fairly expensive antibiotic) it has over the last years worked quite well, even with me."