My husband had been taking 2mg of dilaudid every 4 hours due to post op surgery of a bilateral thoractomy and a esophageal rupture. He can go 8 hrs without needing something and wants to get off the dilaudid as he is experiencing lots of nausea. He tried morphine in icu for a week but it messed with his mind. He seems to be sensitive to the pyschosis of the narcotics. The docs say switching to oxycodone is a choice but we are afraid if more physcosis and addiction. Any suggestions?