He has terrible back pain due to arthritis in lower back. He takes Oxycodone for pain every 4 hrs or as needed. Now he's constipated and I don't know how to treat that without having him develop the opposite problem. Since he moves so slowly, it takes him a while to get to the bathroom. Any ideas? Does anyone know of a laxative that is gentle and won't give him the runs. Thanks for any help you can give me.