My husband has been on pain medications for several years. They recently could not fill his prescription and the dr had to give him a different kind of meds. He now has a rash down both arms that almost looks like measles. He told me tonite that his mouth fills funny almost like a rash on his tongue. I told him to stop the pain medication and take the ones he was prescribed before (he has a couple days worth of the previous meds. I wanted to see if in the morning he still has the rash. Do you think you can get a rash from pain medication. It s morphine sulp ER. His other pain med is Avinza