Hello. My mom is 86 and has macular degeration and a bad back, bu...

Hello. My mom is 86 and has macular degeration and a bad back, but there was nothing wrong with her faculties. About a month ago she had severe pain in her back. We went to the emergency room and she was admitted. After a week and numerous MRI's CAT scans, bone scans, and Xrays it was determied she had a compression fracture of the T9 vertabrae. She had on previously.They had her on anhuge amt. of meds. She was being given ms contin, percoset and flexoril. They seemed to sort of work and didn't have any severe side effects, except the flexoril made her groggy. She was sent to a sub-accute center for physical therapy. She did fairly well there and was in for 2 weeks. When she was released ( a week ago Wed.) we had hwe ms contin rx filled. I was giving her her meds (her usual ones she was taking prior) and the morphine. Within 2 days she was getting strange. She wouldn't get out of bed (HIGHLY unusual for her)she was very disoriented, wouldn't eat all the usual side effects I found out about. I have stopped the pills as of Thurs morn. I have seen a pretty good changeEXCEPT for lingering confusion. She can't rember how to use her TV remotes. Since her eyes were bad she used the before by memory for the buttons but now she can't remember where the up/down buttons are. She realizes she is confused. Can you let me know what kind of time table if any there is to this medicines effects leaving the body. Even though she is 86 before she went into the hospital she had NO mental deterioration. I realize that it is only 72 hrs but I wan't to have some idea what to look for. Thank you Linda