The generic Cipro I am taking for my cold is suppose to maybe cause tendon pain or muscle pain. My tendons are fine, but not sure if it was the intense leg presses on Saturday, but I am sore as hell. Usually it lasts a day or two, but now it's day four. Still hurts to get out of my car, chair, the can. I feel like a 90 yr old :). Skipped it last night, but off to gym tonight. Will skip the legs for awhile.