sinusitis
"I took this medication for 6 of the 10 prescribed days and discontinued it on my own due to severe pain all over my body.  The pain felt like a serious muscle/joint pain, mostly in my elbows, feet, ankles and shoulders.  It has been about a week and I am still hurting and taking it easy.  Forget the gym, that makes it much worse.  I am taking pain medication daily (both NSAIDs and other meds) and it seems to help."