My MIL constantly calls out at her care home night and day. What can we do?

Following a pelvic hip fracture and hospitalisation she was partially immobile. This was when the calling out started.
She then went to care home sept last year for only three weeks and had severe water infection with sepsis.
Following being in hospital for six weeks where she didn't get up unless really pushed, the care home refused to readmit her due to shouting.
Then to care current care home. She has been at this care home for four months now!

How long has she been at this home, Pamelalilly?

This all started in hospital.
They tried hyperperidol and quetiapine.
The care home use other meds like antihistamine I think just to try and make her drowsy

get better meds