There's always hope but they have had a field day with your mother so I really don't know what to tell you. She's probably on a wide variety of meds too.
The big idea behind Medicare is to make a ton of money off the old folks. Meds, meds and more meds, surgery, tests, tests, and more tests. All payable by Medicare.
If you can get her off the meds the best thing I've seen that help the old folks is colon cleansing. Barefoots LBB and the coffee enema do wonders for the elderly. Just getting them off the meds does wonders also and may be all she needs.