Im not wanting to scare any of you, but my reaction to this family of antibiotics happened in Spring 2002. I took one dose of this quinolone antibiotic for a sinus infection and was in the ER four hours later. After taking the medication, I felt very fatigued and lay down on the couch, I woke up a few minutes later feeling like I was falling, and my heart sustained 170+ beats per minute heart palpitations for several hours. The last thing I remember was calling 911 because I was home alone and knew something awful was happening. The ENT's said that they had never seen anything like it. I experienced horrific anxiety attacks for weeks afterward. Keep in mind I had been a very healthy gal before and had never experienced any type of health problems. I now see a rheumatologist, a neurologist and a gastroenterologist. I have been diagnosed with MCTD (Multiple connective tissue disorder) a Lupus like illness. My neurologist says that my central nervous system was damaged in the reaction as well. He also says that physicians are grossly misinformed about this family of antibiotics, and in his opinion, anyone who prescribes them for anything less than a life threatening condition is committing medical malpractice. I agree wholeheartedly since my life will never be the same.