My 86-year old mother has been taking the oral form of morphine for about 4 weeks.  After about two weeks she started becoming very confused (not knowing the day of the week, forgetting she had spoken to me on the phone, believing we were going on a trip, etc.)  and hallucinating (believing people were at her home when they were not, believing she had held a phone conversation with someone when she had not, etc).  Could this be a side effect of the morphine?
HiMorphine is definitely known to cause hallucinations and confusion. In fact that is one of the reasons that morphine is given very carefully.Having said that, I would like to know the entire medical/surgical history because a large number of conditions, drugs and their side effects can cause this kind of pattern.I would suggest checking sugars and electrolytes at least.Best of luckHope that helps