Perhaps they need to take another look at her meds to see if a possible adjustment is in order.
I lost my Mother in October 2008 and think of her and miss her every day. She was my very best friend.
She lived 1500 miles away from me and was in a nursing home in the city where my sister lived although I would have preferred to have her live with me. In prior years she would spend the winter months with me. I could not spend much time with her in her final few years ..which I sadly regret...as my hubby has PD/LBD, cannot travel and I am his 24/7 caregiver.
Spend as much time with her as you can or phone often. She will hear you.
Aren't we fortunate to have had that close relationship with our Moms?