@tracidw The FDA has a black box warning against using Seroquel for Alzheimer / Dementia patients. It can cause increased agitation, strokes, etc. Please look into this and consider stopping that prescription.
My LO was recently in the hospital (an excellent Boston-area hospital). By day 2, my LO's anxiety was off the charts and she was much weaker and unable to manage routine tasks. She also has severe sundowners. I had suspected there was an issue with Seroquel, researched it, and called the hospital to order the dosage stopped immediately. My LO was better the following day and increasingly better since.
https://www.mayoclinic.org/drugs-supplements/quetiapine-oral-route/description/drg-20066912