I was prescribed Levaquin for a persistent cough and sinus condition I have had for six weeks. I am on day two and I can tell you if I have the same side effects tonight as I had this past night I am calling my Doctor. After taking Levaquin my symptons became worse, I could not stop coughing (it seems to have exacerbated the cough) all night and when I did fall asleep the nightmares I had were, to say the least, horrible. I would urge caution on taking this drug.