Levofloxacin
"Doc said I had pneumonia, but I had very few symptoms: runny nose, sore throat, and cough. Only went to the Dr. when pain started in my right lung when I coughed. Went through one 10-day round of Levofloxacin. Around day 3 my right elbow got a little stiff (no pain) but it stopped after 2 days. Around day 7, my right knee developed a pain that came and went for 2 days. I can't be sure either was caused by the drug since neither issue lasted more than 2 days. After x-rays and CT scan, Dr. said infection much improved, but not totally knocked out. And I"m still having pain in my chest and back. So after a break of several days, I'm starting a second 10-day round. My main point is I did not experience the bad side effects."