I am 39-year-old very active healthy female. I can say I am tolerant to most drugs I have taken in my life so far. However, I took Levaquin yesterday and today, 750 mg per day for five days for the sinus infection, I felt so horrible starting 2-3 hours after I first took it. I felt nausea, headache, extremely fatigue, stomach pain, diarrhea, vomiting, lose sleep.I also felt painful in my heart area this morning......After checking on the internet today, I know I was poisoned by Levaquin. I felt more horrible that my doctor did not tell my the side effect even when I asked this question specifically when was given the prescription. I am not allergy to other antibiotics, and I had no clue why the doctor would think this medication is necessary to me. I decided to stop Levaquin, and also not to see that doctor again. Please be careful to pick your doctor, some are very dumb and cannot even treat a cold.