Suggest Treatment For Confusion And Hallucination In An Elderly Person

I know of an elderly woman (78 YOA) who lost her husband a little over one year ago. She has been having some confusion (ex. got lost going to a friend s house that she s been to many times), repeats herself over and over in the same conversation, and today had a, what I ll call a hallucination. She called her son to ask him where he went. He lives in another state but she thought he had been to her home and disappeared (she couldn t find him). Also today, she told her other son that someone had taken her Kindle that she just got for her birthday yesterday-she lives alone and no one has been to her house today, but it went missing and she feels that someone took it.