Levofloxacin
"I am not doubting others have he issues, but cipro and levaquin are the only antibiotics I can take (I have severe allergies to others). When I have a sinus infection levaquin is a life saver. I'm so thankful for it. I do get a bit nauseous on it, but it's strong... I take with food,  and if I get nauseous I eat crackers. It helps when other meds fail me. I just am concerned I will grow an immunity eventually. The drug does make me feel yucky initially , but it's like it's "killing" the infection, then I turn around. It is a strong drug, but me, my husband, my parents, friend, sister in law, nice have all taken it at some point and never had any major issues."