My husband with dementia is convinced our house is my house and I am his friend, not his wife. He thinks he has another house and his wife lives there. He wants me to call her and have her come and get him or he wants me to drive him there. If I tell him I can't, he gets nasty and says he will walk there. This is a daily issue and I don;t know how to handle it. Is there medications for this type of behavior?