Mom insists on using the commode even though she cannot hold herself up. Will a catheter help?

Mom has been in Hospice care for nearly two months and has declined with each passing week. She is now at a point where she is bedridden, yet still insists on getting up and going on the commode. She gets very agitated when we try to persuade her to remain in bed as she is wearing diapers. She does this twice a day, and gets hostile. She is becoming a threat to herself and us as it is very hard to to do this as she is dead weight. Other than these few outbursts, she sleeps continually. She has eaten very little over the past week, and will drink an Ensure once or twice (but not every day). When in this agitated state she will try to spit out her meds. She gets Haldol and Ativan 3X per day, Morphine every three hours. Will Hospice increase her meds to keep her sedated continually or use a catheter to ease her distress? They thought for sure she would pass away last weekend, but she rallied and is now waking up and is very difficult to deal with. She has Vascular Dementia.