Thanks, so you don't think she threw up because she tried to stop the morphine but because it was too much percocet?
Sorry to hear what you sister is going through. Pain is an evil thing, when I get really bad pain I just want it to go away and unfortunately it makes me do things that I normally wouldn't do, like take that extra pill. The percocet has tylenol in it and if I take any type of tylenol or motrin, it really makes me sick to my stomach. But, that is no excuse to self medicate yourself either. I would definately have her talk to her doctor and if she will let you, go with her to her doctor's appt and you can tell him or her what is going on. the doctor will definately be the one who can help her and tell her what to do and what not to do. If she is getting sick from the percocet's than the doc needs to know that because throwing up is a horrible feeling and doesn't make it any better when you are in pain.
I hope this helps a little bit anyway. let us know what happens o.k. and keep posting if you have more questions or concern's
til next time montanagurl