Morphine Sulfate SR and drug interaction

My husband has been on Morphine quick release since Jan 2004. He became sleepy , fall asleep anytime anywhere.
This fall , Oct 2004 we went to cancer treatment center in Zion, Ill and they put pain pump in, Medtronic with Fetanyl and Bupivicaine. That seemed to work ok for his long term pain but needed something for breakthrough pain.. They recommended Actic lollypops but the copay was $50 per month so we went with the morphine liquid. That worked ok but like all of you say, his decision making deminished and he slept alot.. Two weeks after he was home he was admitted for dehydration and high BUN. The pcp put him on MS Conten he came home and seemed ok for a week then the side affects started .. jerking , sleeping with wild dreams , talking out loud, seeing people who were not there, it has been awful.. I got on the internet and found out some info.. For one thing the dr put him on laxic and MS Conten should not be used with this med. There are so many things the drs do not take into consideration. Especially the drug interaction.. It has been five days and he is finally calming down.. He is very week, and shaky, dry mouth, eyes roll around. eys open when he is really sleeping. Hallucinations are awful. I have taken him off all morphine. even the MSIR.
Is there any pain med for cancer patients that do not have these horendous side effects. Plz share . thanks!!!

Furious with drs who are ignorant of drugs uses and their side effects.