Any experience with the antipsychotic Zyprexa for late stage Alzheimer’s patients?

My husband is in memory care and has been on Seroquel for 6 months for behavioral issues, primarily extreme anxiety, hallucinations, and paranoia. The doctor is suggesting that he may switch him to zyprexa because he is becoming increasingly agitated and disruptive, even when he receives Xanax to calm him down during an episode. I would like to read comments from others who have experienced their loved one being put on this medication. Thanks for your comments.