Ciprofloxacin
"While I've used this med. in the past, it has been increasingly difficult each time.  While it appears to help the bronchitis, I can't stay on it long enough anymore to get the benefit as the muscle pain (low back/legs/feet) is intolerable to the point that I have to take pain medication for my ongoing back pain issues to deal with the myalgia that the Cipro causes!  For me, Cipro is no longer an option and I'm having to find another medicine to help with bronchitis.  The tendonitis issue is something to watch out for as this last time, several days after stopping the Cipro, I got up from my chair and my feet buckled underneath me. I fell to the floor and twisted my ankle, so am wondering if the tendons were affected. Be careful with this!"