My mother is also on Quietapine. A mental health doctor had visited her at the start of February and rang me to have my opinion and feedback on trying it alongside existing lorazepam. I agreed that we should try it as it might help to stabilise her and make her less aggressive / more compliant with personal care.
Two weeks later the care home emailed social services and copied me in to say it was having no effect and that she was even more distressed and hysterical, especially in the afternoons.
To be honest I don't know how or when they might find the right 'mix' of drugs and I don't like the idea of them mixing things up so much. As Red mentions above, back in November when she was home with dad, she was more mobile, more alert, and able to at least walk to the toilet on her own (although she was already having trouble with soiling or wetting herself then). Now, she is more or less incontinent, talks gibberish most of the time, doesn't know the time of day or day of the week, confused, distressed... everything you would expect.
Mostly due of course being wrenched from her normal home surroundings but also these newly prescribed drugs have made a contribution to her deteriorating state. I had never heard of these medications before but I can see the affects it's having...