I have broke my top arm close to rotator cuff that does not require surgery as per doctor. They immobilized arm with sling. I I have been taking percocets 10's 3 to 4 times a day. They are not totally effective in taking pain away. I I keep a dull ache in whole arm pretty much constant. This break occurred to me 4 weeks ago tomorrow. Also how much if any should I leave my arm out of immobilizer sling? "Than you for any advice to help me with the pain.