I've taken ibuprofen for years and have never had that problem. Perhaps you have a pinched nerve. The ibuprofen reduces the inflammation and you move the area and the nerve then gets pinched. If you can't move the arm well then the nerve doesn't get pinched. That's my uneducated guess.
Post Edited (mssusan) : 4/5/2009 4:57:07 AM (GMT-6)