I am on my 8th day of Levaquin for pneumonia and have had no side effects. I am a 35 year old female who have NEVER been sick in my life other than strep throat twice. I do feel a bit more tired than usual but I have to believe it is from the pneumonia. Went for a somewhat vigorous walk with my daughter tonight - no aches, no pains, no weakness. Levaquin seems fine for me. But to me, it is important to go with what you believe. If your instinct tells you something isn't right - don't give up, keep calling your doctor.