My primary care doctor prescribed Doxycylene for Bronchectisis flare up (coughing with fever 99-101 degrees). I did not get better after 4 days, so He changed to Levoquin, which has worked in the past. This time, however, I experienced nausea and general malaise. After 2 doses of Levoquin, and feeling really bad for 2-3 hours after taking each one, I wondered if Levoquin made me feel worse.