I don't think you can say, across the board, what medications are bad or good. My mom's physician heads up a memory loss/alzheimer's medical center and he is a geriatrician. He has prescribed lorazapam for my mom, for anxiety and agitation with no problems. I think a physician that sees hundreds of patients with dementia has a pretty good grasp on what meds work well.
I'm glad for you, Reachout, that you were able to come to a decision along with your family, for her. Sounds like you have picked a fine facility. If it is at all possible, try to go and see her often, whether it is you or someone in the family. Bottom line, it is the residents that have family involved that end up getting the best care. This is from my personal experience, from other friends as well, and my sister is an RN at a facility.
I wish you all well
Fibromyalgia, Osteoarthritis, scoliosis, back problems, hypothyroidism.