I was prescribed Levaquin 500mg for a sinus infection and it has caused me to have extreme nausea and gastric distress. I felt better before I took the drug and have a call in to my doctor for a different antibiotic. A friend of mine took this drug and had bad joint pain that stopped when she stopped the Levaquin. A drug with so many different side effects shouldn't be prescribed to anyone. I never usually have any bad reactions to medication. I felt better before I took the Levaquin - I feel lousy now!